Harbor Freight Tools Automobile Parts 212 User Manual

Owner’s Manual & Safety Instructions  
Save This Manual Keep this manual for the safety warnings and precautions, assembly, operating,  
inspection, maintenance and cleaning procedures. Write the product’s serial number in the back of the manual  
near the assembly diagram (or month and year of purchase if product has no number). Keep this manual and  
the receipt in a safe and dry place for future reference.  
212, 346 and 420 cc  
Horizontal Engines  
Using an engine indoors  
CAN KILL YOU IN MINUTES.  
Engine exhaust contains carbon monoxide.  
This is a poison you cannot see or smell.  
NEVER use inside  
a home or garage,  
EVEN IF doors and  
windows are open.  
Only use OUTSIDE  
and far away from  
windows, doors,  
and vents.  
Email our technical support at: [email protected]  
ITEMS 68120, 68121,  
68136, 68306  
Manual Revised 11k  
When unpacking, make sure that the product is intact  
and undamaged. If any parts are missing or broken,  
please call 1-800-520-0882 as soon as possible.  
©
®
Copyright 2010 by Harbor Freight Tools . All rights reserved.  
No portion of this manual or any artwork contained herein may be reproduced in  
any shape or form without the express written consent of Harbor Freight Tools.  
Diagrams within this manual may not be drawn proportionally. Due to continuing  
improvements, actual product may differ slightly from the product described herein.  
Tools required for assembly and service may not be included.  
Read this material before using this product.  
Failure to do so can result in serious injury.  
SAVE THIS MANUAL.  
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WARNING SYMBOLS AND DEFINITIONS  
This is the safety alert symbol. It is used to alert you to potential personal injury hazards.  
Obey all safety messages that follow this symbol to avoid possible injury or death.  
Indicates a hazardous situation which, if not avoided,  
will result in death or serious injury.  
Indicates a hazardous situation which, if not avoided,  
could result in death or serious injury.  
Indicates a hazardous situation which, if not avoided,  
could result in minor or moderate injury.  
Addresses practices not related to personal injury.  
Symbol Definitions  
Symbol  
Property or Statement  
Symbol  
Property or Statement  
WARNING marking concerning  
Risk of Respiratory Injury.  
Revolutions Per Minute  
RPM  
Operate engine OUTSIDE and far away  
from windows, doors, and vents.  
Horsepower  
HP  
WARNING marking concerning  
Risk of Fire while handling fuel.  
Do not smoke while handling fuel.  
WARNING marking concerning  
Risk of Eye Injury. Wear ANSI-approved  
safety goggles with side shields.  
WARNING marking concerning  
Risk of Fire.  
Do not refuel while operating.  
Keep flammable objects away from engine.  
Read the manual before set-up and/or use.  
WARNING marking concerning  
Risk of Hearing Loss.  
Wear hearing protection.  
Safety Warnings  
WARNING! Read all instructions.  
Failure to follow all instructions listed below may result in fire, serious injury and/or DEATH.  
The warnings and precautions discussed in this manual cannot cover all possible conditions and  
situations that may occur. It must be understood by the operator that common sense and caution  
are factors which cannot be built into this product, but must be supplied by the operator.  
SAVE THESE INSTRUCTIONS  
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Set up Precautions  
1. Gasoline fuel and fumes are flammable, and  
potentially explosive. Use proper fuel storage  
and handling procedures. Do not store fuel  
or other flammable materials nearby.  
4. Set up and use only on a flat, level,  
well-ventilated surface.  
5. Wear ANSI-approved safety goggles, heavy-duty  
work gloves, and dust mask/respirator during set up.  
2. Have multiple ABC class fire extinguishers nearby.  
6. Use only lubricants and fuel recommended  
3. Operation of this equipment may create sparks  
that can start fires around dry vegetation. A spark  
arrestor may be required. The operator should  
contact local fire agencies for laws or regulations  
relating to fire prevention requirements.  
in the Specifications chart of this manual.  
Operating Precautions  
1.  
CARBON MONOXIDE HAZARD  
Using an engine indoors CAN KILL  
YOU IN MINUTES.  
10. Do not leave the equipment unattended when it is  
running. Turn off the equipment (and remove safety  
keys, if available) before leaving the work area.  
Engine exhaust contains carbon  
monoxide. This is a poison you cannot  
see or smell.  
11. Engine can produce high noise levels.  
Prolonged exposure to noise levels above 85  
dBA is hazardous to hearing. Always wear  
ear protection when operating or working  
around the gas engine while it is operating.  
12. Wear ANSI-approved safety glasses, hearing  
protection, and NIOSH-approved dust mask/  
respirator under a full face shield along  
with steel-toed work boots during use.  
13. People with pacemakers should consult their  
physician(s) before use. Electromagnetic fields in  
close proximity to a heart pacemaker could cause  
pacemaker interference or pacemaker failure.  
Caution is necessary when near the  
NEVER use inside a home or garage,  
EVEN IF doors and windows are open.  
engine’s magneto or recoil starter.  
14. Use only accessories that are recommended  
by Harbor Freight Tools for your model.  
Accessories that may be suitable for one  
piece of equipment may become hazardous  
when used on another piece of equipment.  
Only use OUTSIDE and far away from windows,  
doors, and vents.  
15. Do not operate in explosive atmospheres,  
such as in the presence of flammable  
liquids, gases, or dust. Gasoline-powered  
engines may ignite the dust or fumes.  
2. Keep children away from the equipment,  
especially while it is operating.  
3. Keep all spectators at least six feet  
from the Engine during operation.  
16. Stay alert, watch what you are doing and  
use common sense when operating this  
piece of equipment. Do not use this piece of  
equipment while tired or under the influence  
of drugs, alcohol or medication.  
4. Fire Hazard! Do not fill gas tank while engine is  
running. Do not operate if gasoline has been spilled.  
Clean spilled gasoline before starting engine.  
Do not operate near pilot light or open flame.  
5. Do not touch engine during use. Let  
engine cool down after use.  
17. Do not overreach. Keep proper footing and  
balance at all times. This enables better control  
of the equipment in unexpected situations.  
6. Never store fuel or other flammable  
materials near the engine.  
18. Use this equipment with both hands  
only. Using equipment with only one hand  
can easily result in loss of control.  
7. Only use a suitable means of transport and  
lifting devices with sufficient weight bearing  
capacity when transporting the Engine.  
19. Dress properly. Do not wear loose clothing or  
jewelry. Keep hair, clothing and gloves away  
from moving parts. Loose clothes, jewelry or  
long hair can be caught in moving parts.  
8. Secure the Engine on transport vehicles to  
prevent the tool from rolling, slipping, and tilting.  
9. Industrial applications must follow  
OSHA requirements.  
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Operating Precautions (cont.)  
20. Parts, especially exhaust system components,  
get very hot during use. Stay clear of hot parts.  
26. When spills of fuel or oil occur, they must be  
cleaned up immediately. Dispose of fluids and  
cleaning materials as per any local, state, or  
federal codes and regulations. Store oil rags in  
a bottom-ventilated, covered, metal container.  
21. Do not cover the engine or  
equipment during operation.  
22. Keep the equipment, engine, and  
surrounding area clean at all times.  
27. Keep hands and feet away from moving parts. Do  
not reach over or across equipment while operating.  
23. Use the equipment, accessories, etc., in accordance  
with these instructions and in the manner intended for  
the particular type of equipment, taking into account  
the working conditions and the work to be performed.  
Use of the equipment for operations different from  
those intended could result in a hazardous situation.  
28. Before use, check for misalignment or binding of  
moving parts, breakage of parts, and any other  
condition that may affect the equipment’s operation.  
If damaged, have the equipment serviced  
before using. Many accidents are caused  
by poorly maintained equipment.  
24. Do not operate the equipment with known  
leaks in the engine’s fuel system.  
29. Use the correct equipment for the application.  
Do not modify the equipment and do not use the  
equipment for a purpose for which it is not intended.  
25. This product contains or, when used, produces a  
chemical known to the State of California to cause  
cancer and birth defects or other reproductive harm.  
(California Health & Safety Code § 25249.5, et seq.)  
Service Precautions  
1. Before service, maintenance, or cleaning:  
a. Turn the engine switch to its “OFF” position.  
b. Allow the engine to completely cool.  
8. Follow scheduled engine and  
equipment maintenance.  
Refueling:  
c. Then, remove the spark plug  
1. Do not smoke, or allow sparks, flames,  
or other sources of ignition around the  
equipment, especially when refuelling.  
cap from the spark plug.  
2. Keep all safety guards in place and in  
proper working order. Safety guards include  
muffler, air cleaner, mechanical guards,  
and heat shields, among other guards.  
2. Do not refill the fuel tank while the  
engine is running or hot.  
3. TO PREVENT FUEL LEAKAGE AND FIRE  
HAZARD, do not fill fuel above the bottom of  
fuel strainer for the 68121, 212cc engine.  
3. Do not alter or adjust any part of the  
equipment or its engine that is sealed by the  
manufacturer or distributor. Only a qualified  
service technician may adjust parts that may  
increase or decrease governed engine speed.  
4. Wear ANSI-approved safety goggles, heavy-duty  
work gloves, and dust mask/respirator during service.  
5. Maintain labels and nameplates on the equipment.  
These carry important information.  
If unreadable or missing, contact  
Harbor Freight Tools for a replacement.  
68121 Max Fuel  
DO NOT OVERFILL!  
6. Have the equipment serviced by a qualified repair  
person using only identical replacement parts.  
This will ensure that the safety of the equipment  
is maintained. Do not attempt any service or  
maintenance procedures not explained in this  
manual or any procedures that you are uncertain  
about your ability to perform safely or correctly.  
4. Do not fill fuel tank to the top. Leave a little  
room for the fuel to expand as needed.  
5. Refuel in a well-ventilated area only.  
6. Wipe up any spilled fuel and allow excess  
to evaporate before starting engine.  
To prevent FIRE, do not start the engine  
while the smell of fuel hangs in the air.  
7. Store equipment out of the reach of children.  
SAVE THESE INSTRUCTIONS.  
Horizontal Engines  
For technical questions, please call 1-800-520-0882.  
Page 5  
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Set Up  
Read the ENTIRE IMPORTANT SAFETY INFORMATION section at the beginning of this manual  
including all text under subheadings therein before set up or use of this product.  
Model 68120: The emission control system for this  
engine is warranted for standards set by the U.S.  
Environmental Protection Agency. For warranty  
information, refer to the last pages of this manual.  
TO PREVENT SERIOUS INJURY:  
Operate only with proper spark arrestor installed.  
Models 68306, 68121, and 68136: The emission  
control system for this Generator’s Engine is  
warranted for standards set by the U.S. Environmental  
Protection Agency and by the California Air Resources  
Board (also known as CARB). For warranty  
Operation of this equipment may create sparks that  
can start fires around dry vegetation.  
A spark arrestor may be required.  
The operator should contact local fire  
agencies for laws or regulations relating  
to fire prevention requirements.  
information, refer to the last pages of this manual.  
WARNING! DO NOT INSTALL THIS  
ENGINE ON A VEHICLE.  
At high altitudes, the engine’s carburetor, governor  
(if so equipped), and any other parts that control  
the fuel-air ratio will need to be adjusted by a  
qualified mechanic to allow efficient high-altitude  
use and to prevent damage to the engine and  
any other devices used with this product.  
Battery Setup Instructions  
1. Place a fully charged, lead-acid 12 volt,  
300 CCA, 36 Ah battery (not included) in  
a stable, flat location near the engine.  
4. Attach the negative cable to the  
negative battery terminal.  
5. Connect the negative cable securely to one  
of the engine mounting bolts, as shown in  
the diagram below. Connect cable securely to  
prevent disconnection and short circuits.  
2. Only use cables sized to match their length  
according to the following chart:  
Cable Gauge  
Maximum  
(lower gauge numbers  
mean thicker cables)  
Cable Length  
6
4
2
5′  
7′  
12′  
Connect Negative  
Battery Cable to a  
Mounting Bolt  
Motor Starter Assembly  
Starting Relay  
6. Coat the terminals and cable ends with  
a corrosion-preventive coating.  
3. Attach the positive cable from the positive  
battery terminal to the Positive Terminal on  
the starter solenoid (uncovered terminal),  
shown above. Connect cable securely to  
prevent disconnection and short circuits.  
REV 11j  
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Engine Controls  
Fuel Cap  
Air Filter  
Engine  
Switch  
(Electric  
Start Models)  
Starter  
Handle  
Muffler  
Oil Drain Plug  
Throttle  
Dipstick  
Choke  
Starter  
(Electric  
Fuel Valve  
Start Models)  
Serial  
Number  
Location  
(Write on front  
cover of manual.)  
Engine  
Switch  
(Manual Start  
Models)  
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Operation  
Read the ENTIRE IMPORTANT SAFETY INFORMATION section at the beginning of this manual  
including all text under subheadings therein before set up or use of this product.  
Pre-Start Checks  
Inspect engine and equipment looking for damaged, loose, and missing parts before set up  
and starting. If any problems are found, do not use equipment until fixed properly.  
Checking and Filling Engine Oil  
NOTICE: Your Warranty is VOID if the engine’s  
crankcase is not properly filled with oil before  
each use. Before each use, check the oil level.  
Do not run the engine with low or no engine oil.  
Full level  
Full level  
Running the engine with no or low engine oil  
WILL permanently damage the engine.  
1. Make sure the engine is stopped and is level.  
2. Close the Fuel Valve.  
4. Reinsert the Dipstick without threading it in and  
remove it to check the oil level. The oil level  
3. Clean the top of the Dipstick and the area around it.  
Remove the Dipstick by threading it counterclockwise,  
and wipe it off with a clean lint free rag.  
should be up to the full level as shown above.  
5. If the oil level is at or below the low mark add the  
appropriate type of oil until the oil level is at the  
proper level. SAE 10W-30 oil is recommended  
for general use. (The SAE Viscosity Grade chart  
on page 15 in the Service section shows other  
viscosities to use in different average temperatures.)  
6. Thread the dipstick back in clockwise.  
NOTICE: Do not run the engine with too little oil.  
The engine will be permanently damaged.  
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Checking and Filling Fuel  
WARNING! TO PREVENT SERIOUS  
Note: Do not use gasoline containing more than  
10% ethanol (E10). Do not use E85 ethanol.  
INJURY FROM FIRE:  
Fill the fuel tank in a well-ventilated area  
away from ignition sources. If the engine is  
hot from use, shut the engine off and wait  
for it to cool before adding fuel.  
Note: Do not use gasoline that has been stored in a  
metal fuel container or a dirty fuel container. It can  
cause particles to enter the carburetor, affecting  
engine performance and/or causing damage.  
Do not smoke.  
4. Then replace the Fuel Cap.  
1. Clean the Fuel Cap and the area around it.  
5. Wipe up any spilled fuel and allow excess  
to evaporate before starting engine.  
2. Unscrew and remove the Fuel Cap.  
To prevent FIRE, do not start the engine  
while the smell of fuel hangs in the air.  
3. If needed, fill the Fuel Tank to about 1 inch  
under the fill neck of the Fuel Tank with  
87 octane or higher unleaded gasoline.  
Starting the Engine  
Before Starting the Engine  
Before starting the engine:  
a. Follow the Set Up Instructions in the equipment manual to prepare the equipment.  
b. Inspect the equipment and engine.  
c. Fill the engine with the proper amount and type of both fuel and oil.  
d. Read the Equipment Operation section in the equipment manual.  
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Manual Start  
1. To start a cold engine, move the Choke to the  
CHOKE position.  
1
2
3
To restart a warm engine, leave the Choke in the  
RUN position.  
CHOKE  
RUN  
2. Open the Fuel Valve.  
3. Slide the Throttle or Speed Control Lever to 1/3  
away from the SLOW position (the “turtle”).  
Note: Some tools have a Speed Control Lever located  
elsewhere on the tool which functions the same as the  
Throttle. Use the Speed Control Lever in place of the Throttle  
when the tool is so equipped.  
ON  
O
I
ON  
OFF  
4. Turn the Engine Switch on.  
4
5
5. Grip the Starter Handle of the Engine loosely and pull  
it slowly several times to allow the gasoline to flow into  
the Engine’s carburetor. Then pull the Starter Handle  
gently until resistance is felt. Allow Cable to retract fully  
and then pull it quickly. Repeat until the engine starts.  
Note: Do not let the Starter Handle snap back against the engine.  
Hold it as it recoils so it doesn't hit the engine.  
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6. Allow the Engine to run for several seconds.  
Then, if the Choke lever is in the CHOKE position,  
move the Choke Lever very slowly to its RUN position.  
6
Note: Moving the Choke Lever too fast could stall the engine.  
CHOKE  
RUN  
IMPORTANT: Allow the engine to run at no load for five minutes with no  
load after each start-up so that the engine can stabilize.  
7. Adjust the Throttle as needed.  
8. Break-in Period:  
a. Breaking-in the engine will help to ensure proper equipment and engine operation.  
b. The operational break-in period will last about 3 hours of use. During this period:  
Do not apply a heavy load to the equipment.  
Do not operate the engine at its maximum speed.  
c. The maintenance break-in period will last about 20 hours of use. After this period:  
Change the engine oil.  
Under normal operating conditions subsequent maintenance follows the schedule  
explained in the MAINTENANCE AND SERVICING section.  
Stopping the Engine  
OFF O  
1. To stop the engine in an emergency,  
I
turn the Engine Switch off.  
2. Under normal conditions, use the following procedure:  
a. Slide the Throttle or Speed Control  
Lever to SLOW (the “turtle”).  
b. Turn the Engine Switch off.  
c. Close the Fuel Valve.  
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Electric Start (if equipped)  
1. To start a cold engine, move the Choke to the  
CHOKE position.  
1
To restart a warm engine, leave the Choke in the  
RUN position.  
CHOKE  
RUN  
2
2. Open the Fuel Valve.  
3. Slide the Throttle or Speed Control Lever to 1/3  
away from the SLOW position (the “turtle”).  
Note: Some tools have a Speed Control Lever located  
elsewhere on the tool which functions the same as  
the Throttle. Use the Speed Control Lever in place  
of the Throttle when the tool is so equipped.  
3
ON  
4. Turn the Engine Switch to START.  
OFF  
START  
4
START  
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5. Allow the Engine to run for several seconds.  
Then, if the Choke lever is in the CHOKE position,  
move the Choke Lever very slowly to its RUN position.  
5
Note: Moving the Choke Lever too fast could stall the engine.  
CHOKE  
RUN  
IMPORTANT: Allow the engine to run at no load for five minutes with no  
load after each start-up so that the engine can stabilize.  
6. Adjust the Throttle as needed.  
7. Break-in Period:  
a. Breaking-in the engine will help to ensure proper equipment and engine operation.  
b. The operational break-in period will last about 3 hours of use. During this period:  
Do not apply a heavy load to the equipment.  
Do not operate the engine at its maximum speed.  
c. The maintenance break-in period will last about 20 hours of use. After this period:  
Change the engine oil.  
Under normal operating conditions subsequent maintenance follows the schedule  
explained in the MAINTENANCE AND SERVICING section.  
Stopping the Engine  
1. To stop the engine in an emergency,  
OFF  
turn the Engine Switch off.  
2. Under normal conditions, use the following procedure:  
a. Slide the Throttle or Speed Control  
Lever to SLOW (the “turtle”).  
b. Turn the Engine Switch off.  
c. Close the Fuel Valve.  
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Maintenance  
WARNING  
TO PREVENT SERIOUS INJURY FROM ACCIDENTAL STARTING:  
Turn the Power Switch of the equipment to its “OFF” position, wait for the engine to cool, and disconnect  
the spark plug cap before performing any inspection, maintenance, or cleaning procedures.  
TO PREVENT SERIOUS INJURY FROM EQUIPMENT FAILURE:  
Do not use damaged equipment. If abnormal noise, vibration, or excess  
smoking occurs, have the problem corrected before further use.  
Follow all service instructions in this manual. The engine may fail critically if not serviced properly.  
Many maintenance procedures, including any not detailed in this manual, will need to be  
performed by a qualified technician for safety. If you have any doubts about your ability to safely  
service the equipment or engine, have a qualified technician service the equipment instead.  
Cleaning, Maintenance, and Lubrication Schedule  
Note: This maintenance schedule is intended solely as a general guide. If performance decreases or if  
equipment operates unusually, check systems immediately. The maintenance needs of each piece of equipment  
will differ depending on factors such as duty cycle, temperature, air quality, fuel quality, and other factors.  
Note: The following procedures are in addition to the regular checks and maintenance  
explained as part of the regular operation of the engine and equipment.  
Monthly or  
every 20  
hr. of use  
Yearly or  
every 300  
hr. of use  
Before  
Each Use  
Every 3 mo. or Every 6 mo. or  
50 hr. of use 100 hr. of use  
Every  
2 Years  
Procedure  
Brush off outside of engine  
Check engine oil level  
Check air cleaner  
Check deposit cup  
Change engine oil  
Clean/replace air cleaner  
*
Check and clean spark plug  
1. Check/adjust idle speed  
2. Check/adjust valve clearance  
3. Clean fuel tank, strainer  
and carburetor  
**  
**  
**  
4. Clean carbon build-up from  
combustion chamber  
Replace fuel line if necessary  
*Service more frequently when used in dusty areas.  
**These items should be serviced by a qualified technician.  
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Checking and Filling Fuel  
WARNING! TO PREVENT SERIOUS  
Engine Oil Change  
CAUTION! Oil is very hot during operation and can  
INJURY FROM FIRE:  
cause burns. Wait for engine to cool before changing oil.  
Fill the fuel tank in a well-ventilated area  
away from ignition sources. If the engine is  
hot from use, shut the engine off and wait  
for it to cool before adding fuel.  
1. Make sure the engine is stopped and is level.  
2. Close the Fuel Valve.  
3. Place a drain pan (not included) underneath  
the crankcase’s drain plug.  
Do not smoke.  
1. Clean the Fuel Cap and the area around it.  
4. Remove the drain plug and, if possible,  
tilt the crankcase slightly to help drain  
the oil out. Recycle used oil.  
2. Unscrew and remove the Fuel Cap.  
3. If needed, fill the Fuel Tank to about 1 inch under  
the fill neck of the Fuel Tank with 87 octane or  
higher unleaded gasoline. For the 68121, fill to  
the bottom of the fuel strainer ONLY, see below.  
5. Replace the drain plug and tighten it.  
6. Clean the top of the Dipstick and the area around it.  
Remove the Dipstick by threading it counterclockwise,  
and wipe it off with a clean lint free rag.  
Full level  
Full level  
68121 Max Fuel  
DO NOT OVERFILL!  
7. Add the appropriate type of oil until the oil level is at  
the full level. SAE 10W-30 oil is recommended for  
general use.  
WARNING! TO PREVENT FUEL LEAKAGE AND  
FIRE HAZARD, do not fill fuel above the bottom  
of fuel strainer for the 68121, 212cc engine.  
The SAE Viscosity Grade chart shows other  
viscosities to use in different average temperatures.  
Note: Do not use gasoline containing more than  
10% ethanol (E10). Do not use E85 ethanol.  
SAE Viscosity Grades  
Note: Do not use gasoline that has been stored in a  
metal fuel container or a dirty fuel container. It can  
cause particles to enter the carburetor, affecting  
engine performance and/or causing damage.  
30  
10W-30  
4. Then replace the Fuel Cap.  
5. Wipe up any spilled fuel and allow excess  
to evaporate before starting engine.  
5W-30  
To prevent FIRE, do not start the engine  
while the smell of fuel hangs in the air.  
-20  
0
20  
40  
60  
80  
100°F  
Average outdoor temperature  
8. Thread the dipstick back in clockwise.  
CAUTION! Do not run the engine with too little oil.  
The engine will be permanently damaged.  
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Air Filter Element Maintenance  
Spark Plug Maintenance  
1. Remove the air filter cover and the  
air filter elements and check for dirt.  
Clean or replace as described below.  
Spark  
Plug  
Cap  
2. Cleaning:  
For “paper” filter elements:  
To prevent injury from dust and debris,  
wear ANSI-approved safety goggles,  
NIOSH-approved dust mask/respirator, and  
heavy-duty work gloves. In a well-ventilated  
area away from bystanders, use pressurized  
air to blow dust out of the air filter. If this  
does not get the filter clean, replace it.  
1. Disconnect spark plug cap from end of plug.  
Clean out debris from around spark plug.  
For foam filter elements:  
2. Using a spark plug wrench, remove the spark plug.  
Wash the element in warm water and  
mild detergent several times. Rinse.  
Squeeze out excess water and allow it to dry  
completely. Soak the filter in lightweight oil  
briefly, then squeeze out the excess oil.  
3. Inspect the spark plug:  
If the electrode is oily, clean it using a clean, dry  
rag. If the electrode has deposits on it, polish it  
using emery paper. If the white insulator is cracked  
or chipped, the spark plug needs to be replaced.  
3. Install the new filter or the cleaned filter.  
Secure the Air Cleaner Cover before use.  
Recommended Spark Plugs  
Brand  
68120, 68121 68136 68306  
®
BP-6ES  
NGK  
NHSP TORCH  
® /  
®
F6TC  
F6TC  
F6TC  
NOTICE: Using an incorrect spark  
plug may damage the engine.  
4. When installing a new spark plug, adjust the  
plug’s gap to the specification on the Technical  
Specifications chart. Do not pry against the  
electrode, the spark plug can be damaged.  
5. Install the new spark plug or the cleaned spark plug  
into the engine. Gasket-style: Finger-tighten until the  
gasket contacts the cylinder head, then tighten about  
1/2-2/3 turn more.  
Non-gasket-style: Finger-tighten until the plug  
contacts the head, then tighten about 1/16 turn more.  
NOTICE: Tighten the spark plug properly.  
If loose, the spark plug will cause the engine  
to overheat. If overtightened, the threads  
in the engine block will be damaged.  
6. Apply dielectric spark plug boot protector  
(not included) to the end of the spark  
plug and reattach the wire securely.  
Page 16  
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Storage  
When the equipment is to remain idle for longer than  
20 days, prepare the engine for storage as follows:  
d. Open the fuel valve. After all fuel has  
drained, reinstall the drain bolt and sediment  
cup (if equipped). Tighten securely.  
1. CLEANING:  
Wait for engine to cool, then clean engine with  
dry cloth. NOTICE: Do not clean using water.  
The water will gradually enter the engine  
and cause rust damage. Apply a thin coat  
of rust preventive oil to all metal parts.  
3. LUBRICATION:  
a. Change engine oil.  
b. Clean out area around spark plug. Remove  
spark plug and pour one tablespoon of engine  
oil into cylinder through spark plug hole.  
2. FUEL:  
c. Replace spark plug, but leave spark  
plug cap disconnected.  
WARNING! TO PREVENT SERIOUS  
INJURY FROM FIRE:  
Drain the fuel tank in a well-ventilated area  
away from ignition sources. If the engine is  
hot from use, shut the engine off and wait  
for it to cool before draining fuel.  
d. Pull Starter Handle to distribute oil in cylinder.  
Stop after one or two revolutions when you  
feel the piston start the compression stroke  
(when you start to feel resistance).  
4. BATTERY:  
Do not smoke.  
Disconnect battery cables (if equipped).  
Recharge batteries monthly while in storage.  
a. Place a funnel leading to a proper gasoline  
container below the carburetor.  
5. STORAGE AREA:  
Cover and store in a dry, level, well-ventilated  
area out of reach of children. Storage area  
should also be away from ignition sources, such  
as water heaters, clothes dryers, and furnaces.  
6. AFTER STORAGE:  
Before starting the engine after storage, keep  
in mind that untreated gasoline will deteriorate  
quickly. Drain the fuel tank and change to fresh  
fuel if untreated gasoline has been sitting for  
a month, if treated gasoline has been sitting  
beyond the fuel stabilizer’s recommended  
time period, or if the engine does not start.  
Sediment Cup  
(some engines)  
Drain Plug  
b. Remove the drain bolt from the bottom of the  
carburetor bowl and allow the fuel to drain.  
c. Remove the small sediment cup next to the bowl  
and allow the fuel to drain from there as well.  
Horizontal Engines  
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Page 17  
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Troubleshooting  
Problem  
Possible Causes  
Probable Solutions  
Engine will not start FUEL RELATED:  
1. No fuel in tank or fuel valve closed.  
2. Choke not in CHOKE position, cold engine. 2. Move Choke to CHOKE position.  
FUEL RELATED:  
1. Fill fuel tank and open fuel valve.  
3. Gasoline with more than 10% ethanol  
used. (E15, E20, E85, etc.)  
3. Clean out ethanol rich gasoline from fuel  
system. Replace components damaged  
by ethanol. Use fresh 87+ octane  
unleaded gasoline only.  
Do not use gasoline with more than  
10% ethanol (E15, E20, E85, etc.).  
4. Low quality or deteriorated, old gasoline.  
4. Use fresh 87+ octane unleaded gasoline.  
Do not use gasoline with more than  
10% ethanol (E15, E20, E85, etc.).  
5. Carburetor not primed.  
6. Dirty fuel passageways.  
5. Pull on Starter Handle to prime.  
6. Clean out passageways using  
fuel additive. Heavy deposits  
may require further cleaning.  
7. Carburetor needle stuck.  
Fuel can be smelled in the air.  
7. Gently tap side of carburetor float  
chamber with screwdriver handle.  
8. Too much fuel in chamber. This can be  
caused by the carburetor needle sticking.  
8. Turn Choke to RUN position.  
Remove spark plug and pull the start  
handle several times to air out the  
chamber. Reinstall spark plug and  
set Choke to CHOKE position.  
9. Clogged Fuel Filter.  
9. Replace Fuel Filter.  
IGNITION (SPARK) RELATED:  
1. Spark plug cap not connected securely.  
2. Spark plug electrode wet or dirty.  
3. Incorrect spark plug gap.  
IGNITION (SPARK) RELATED:  
1. Connect spark plug cap properly.  
2. Clean spark plug.  
3. Correct spark plug gap.  
4. Replace spark plug cap.  
4. Spark plug cap broken.  
5. Circuit breaker tripped  
(electric start models only).  
5. Reset circuit breaker. Check wiring and  
starter motor if breaker continues to trip.  
6. Incorrect spark timing or  
faulty ignition system.  
6. Have qualified technician diagnose/  
repair ignition system.  
COMPRESSION RELATED:  
COMPRESSION RELATED:  
1. Cylinder not lubricated. Problem after long 1. Pour tablespoon of oil into spark  
storage periods.  
plug hole. Crank engine a few  
times and try to start again.  
2. Loose or broken spark plug. (Hissing  
noise will occur when trying to start.)  
2. Tighten spark plug. If that does not work,  
replace spark plug. If problem persists,  
may have head gasket problem, see #3.  
3. Loose cylinder head or damaged  
head gasket. (Hissing noise will  
occur when trying to start.)  
3. Tighten head. If that does not remedy  
problem, replace head gasket.  
4. Engine valves or tappets  
mis-adjusted or stuck.  
4. Have qualified technician diagnose/  
repair ignition system.  
Follow all safety precautions whenever diagnosing or servicing the equipment or engine.  
Page 18  
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Problem  
Possible Causes  
Probable Solutions  
Engine misfires  
1. Spark plug cap loose.  
1. Check wire connections.  
2. Incorrect spark plug gap or  
damaged spark plug.  
2. Re-gap or replace spark plug.  
3. Defective spark plug cap.  
4. Old or low quality gasoline.  
3. Replace spark plug cap.  
4. Use only fresh 87+ octane  
unleaded gasoline.  
Do not use gasoline with more than  
10% ethanol (E15, E20, E85, etc.).  
5. Incorrect compression.  
1. Low oil shutdown.  
5. Diagnose and repair compression.  
(Use Engine will not start:  
COMPRESSION RELATED section.)  
Engine stops  
suddenly  
1. Fill engine oil to proper level. Check  
engine oil before EVERY use.  
2. Fuel tank empty or full of impure or low  
quality gasoline.  
2. Fill fuel tank with fresh 87+ octane  
unleaded gasoline.  
Do not use gasoline with more than  
10% ethanol (E15, E20, E85, etc.).  
3. Defective fuel tank cap creating  
vacuum, preventing proper fuel flow.  
3. Test/replace fuel tank cap.  
4. Faulty magneto.  
4. Have qualified technician service magneto.  
5. Secure spark plug cap.  
5. Disconnected or improperly  
connected spark plug cap.  
Engine stops when 1. Dirty air filter  
under heavy load  
1. Clean or replace element.  
2. Engine running cold.  
2. Allow engine to warm up prior  
to operating equipment.  
Engine knocks  
1. Old or low quality gasoline.  
1. Fill fuel tank with fresh 87+ octane  
unleaded gasoline.  
Do not use gasoline with more than  
10% ethanol (E15, E20, E85, etc.).  
2. Engine overloaded.  
2. Do not exceed equipment’s load rating.  
3. Incorrect spark timing, deposit  
buildup, worn engine, or other  
mechanical problems.  
3. Have qualified technician  
diagnose and service engine.  
Engine backfires  
1. Impure or low quality gasoline.  
1. Fill fuel tank with fresh 87+ octane  
unleaded gasoline.  
Do not use gasoline with more than  
10% ethanol (E15, E20, E85, etc.).  
2. Engine too cold.  
2. Use cold weather fuel and oil  
additives to prevent backfiring.  
3. Intake valve stuck or overheated engine.  
4. Incorrect timing.  
3. Have qualified technician  
diagnose and service engine.  
4. Check engine timing.  
Follow all safety precautions whenever diagnosing or servicing the equipment or engine.  
Horizontal Engines  
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Page 19  
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Warranties  
Limited 90 Day Warranty  
Harbor Freight Tools Co. makes every effort to assure that its products meet high quality and durability standards, and  
warrants to the original purchaser that this product is free from defects in materials and workmanship for the period  
of 90 days from the date of purchase. This warranty does not apply to damage due directly or indirectly, to misuse,  
abuse, negligence or accidents, repairs or alterations outside our facilities, criminal activity, improper installation,  
normal wear and tear, or to lack of maintenance. We shall in no event be liable for death, injuries to persons or  
property, or for incidental, contingent, special or consequential damages arising from the use of our product. Some  
states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation of  
exclusion may not apply to you. THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER WARRANTIES,  
EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS.  
To take advantage of this warranty, the product or part must be returned to us with transportation charges prepaid.  
Proof of purchase date and an explanation of the complaint must accompany the merchandise. If our inspection  
verifies the defect, we will either repair or replace the product at our election or we may elect to refund the purchase  
price if we cannot readily and quickly provide you with a replacement. We will return repaired products at our expense,  
but if we determine there is no defect, or that the defect resulted from causes not within the scope of our warranty,  
then you must bear the cost of returning the product.  
This warranty gives you specific legal rights and you may also have other rights which vary from state to state.  
Emission Control System Warranty  
United States Emission Control Defects  
Warranty Statement  
California and United States Emission Control  
Defects Warranty Statement  
(for Model 68120)  
(for Models 68306, 68121, and 68136)  
The United States Environmental Protection Agency (herein EPA)  
and Harbor Freight Tools (herein HFT) are pleased to explain the  
emission control system warranty on your 1997 and later Small Off-  
Road Engine (herein engine). Within the United States, new off-road,  
spark-ignition engines certified for model year 1997 and later, must be  
designed, built and equipped to meet the stringent anti-smog standards  
set forth by the EPA. HFT must warrant the emission control system on  
your engine for the periods of time described below, provided there has  
been no abuse, neglect or improper maintenance of your engine.  
The California Air Resources Board (herein CARB), the United  
States Environmental Protection Agency (herein EPA), and Harbor  
Freight Tools (herein HFT) are pleased to explain the emission control  
system warranty on your 1995 and later Small Off-Road Engine (herein  
engine). In California, the engine must be designed, built and equipped  
to meet the State’s stringent anti-smog standards. Elsewhere within the  
United States, new off-road, spark-ignition engines certified for model  
year 1997 and later, must meet similar standards set forth by the EPA.  
HFT must warrant the emission control system on your engine for the  
periods of time described below, provided there has been no abuse,  
neglect or improper maintenance of your engine.  
Your emission control system may include parts such as the  
carburetor or fuel-injection system, and the ignition system. Also  
included may be hoses, belts, connectors and other emission-related  
assemblies.  
Your emission control system may include parts such as the  
carburetor or fuel-injection system, and the ignition system. Also  
included may be hoses, belts, connectors and other emission-related  
assemblies.  
Where a warrantable condition exists, HFT will repair your engine  
at no cost to you including diagnosis, parts and labor.  
Where a warrantable condition exists, HFT will repair your engine  
at no cost to you including diagnosis, parts and labor.  
Manufacturer’s Warranty Coverage  
The 1995 and later engines are warranted for two (2) years. If  
any emission-related part on your engine is defective, the part will be  
repaired or replaced by HFT.  
Page 20  
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4. Coverage Exclusions  
Harbor Freight Tools Emission Control Defects  
Warranty Coverage  
Warranty claims shall be filed in accordance with the provisions  
of the HFT warranty policy explained in the box at the top of the  
previous page. HFT shall not be liable for any loss of use of the  
engine, for any alternative usage, for any damage to goods, loss of  
time, or inconvenience. Warranty coverage shall also be excluded  
for any part which fails, malfunctions, or is damaged due to failure  
to follow the maintenance and operating instructions set forth in the  
Owner’s Manual including, but not limited to:  
Engines are warranted for a period of two (2) years relative to  
emission control parts defects, subject to the provisions set forth below.  
If any emission related part on your engine is defective, the part will be  
repaired or replaced by HFT.  
Owner’s Warranty Responsibilities  
As the engine owner, you are responsible for the performance  
of the required maintenance listed in your Owner’s Manual. HFT  
recommends that you retain all receipts covering maintenance  
on your engine, but HFT cannot deny warranty solely for the lack  
of receipts or for your failure to ensure the performance of all  
scheduled maintenance.  
a) Use of parts which are not authorized by HFT  
b) Improper installation, adjustment or repair of the engine or of  
any warranted part unless performed by an authorized warranty  
center  
c) Failure to follow recommendations on fuel use contained in the  
Owner’s Manual  
As the engine owner, you should, however, be aware that HFT  
may deny you warranty coverage if your engine or a part has failed  
due to abuse, neglect, improper maintenance, or unapproved  
modifications.  
d) Improper or inadequate maintenance of any warranted parts  
e) Repairs performed outside of the authorized warranty  
service dealers  
You are responsible for shipping your engine to a HFT warranty  
station as soon as a problem exists. Contact the HFT Customer  
Service department at the number below to make shipping  
arrangements. The warranty repairs should be completed in a  
reasonable amount of time, not to exceed 30 days.  
f)  
Alterations by changing, adding to or removing parts from  
the engine.  
5. Service and Maintenance  
Component parts which are not scheduled for replacement as  
required maintenance or are scheduled only for regular inspection  
to the effect of “repair or replace as necessary” are warranted for  
the warranty period. Any warranted part which is scheduled for  
replacement as required maintenance is warranted for the period  
of time up to the first scheduled replacement point for that part.  
Any replacement part, provided it is equivalent in durability and  
performance, may be used in performance of maintenance or  
repairs. The owner is responsible for commissioning a qualified  
technician/mechanic to perform all required maintenance, as  
outlined in the Inspection, Cleaning, and Maintenance section in  
this manual.  
If you have any questions regarding your warranty rights and  
responsibilities, you should contact the Harbor Freight Tools Customer  
Service Department at 1-800-520-0882.  
Harbor Freight Tools Emission Control Defects  
Warranty Provisions  
1. Length of Coverage  
HFT warrants to a first retail purchaser and each subsequent  
purchaser that the engine is free from defects in materials and  
workmanship that cause the failure of warranted parts for a  
period of two (2) years after the date of delivery to the first retail  
purchaser.  
6. Warranted Parts  
1) Fuel Metering System  
2. No Charge Repair or Replacement  
i)  
Carburetor and its internal parts.  
Repair or replacement of any warranted part will be performed at  
no charge to the owner if the work is performed through a warranty  
station authorized by HFT. For emissions warranty service, contact  
the HFT Customer Service Department at 1-800-520-0882.  
ii) Fuel pump (if so equipped).  
iii) Cold start enrichment system.  
2) Air Induction System  
i)  
Intake pipe/manifold.  
3. Consequential Damages Coverage  
ii) Air cleaner.  
Coverage under this warranty shall also extend to the failure of any  
engine components caused by the failure of any warranted part  
while it is still covered under this warranty.  
3) Ignition System  
i)  
Spark plug.  
ii) Magneto ignition system.  
4) Catalyst System (if so equipped)  
i)  
Exhaust pipe stud.  
ii) Muffler.  
iii) Catalytic converter (if so equipped).  
5) Miscellaneous Items Used in Above Systems  
i)  
Vacuum, temperature and time sensitive valves and  
switches.  
ii) Hoses, belts, connectors, and assemblies.  
PLEASE READ THE FOLLOWING CAREFULLY  
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS LIST AND ASSEMBLY DIAGRAM  
IN THIS MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER OR DISTRIBUTOR  
MAKES ANY REPRESENTATION OR WARRANTY OF ANY KIND TO THE BUYER THAT HE OR SHE IS  
QUALIFIED TO MAKE ANY REPAIRS TO THE PRODUCT, OR THAT HE OR SHE IS QUALIFIED TO REPLACE  
ANY PARTS OF THE PRODUCT. IN FACT, THE MANUFACTURER AND/OR DISTRIBUTOR EXPRESSLY  
STATES THAT ALL REPAIRS AND PARTS REPLACEMENTS SHOULD BE UNDERTAKEN BY CERTIFIED AND  
LICENSED TECHNICIANS, AND NOT BY THE BUYER. THE BUYER ASSUMES ALL RISK AND LIABILITY  
ARISING OUT OF HIS OR HER REPAIRS TO THE ORIGINAL PRODUCT OR REPLACEMENT PARTS  
THERETO, OR ARISING OUT OF HIS OR HER INSTALLATION OF REPLACEMENT PARTS THERETO.  
Horizontal Engines  
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Page 21  
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Parts Lists and Diagrams  
68120 212cc Parts List  
Part  
Description  
Qty.  
1
1
1
1
4
1
1
2
2
4
1
1
1
1
1
1
2
2
1
1
1
1
2
1
1
1
1
2
1
1
6
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
1
2
Part  
Description  
Qty.  
2
2
2
2
1
3
1
1
1
1
1
2
1
1
1
4
1
1
1
1
1
2
1
1
1
2
1
1
1
1
1
2
1
1
2
1
1
1
1
2
1
1
2
1
1
1
1
1
1
1
2
3
4
5
6
7
8
9
Gasket, Cylinder Head  
51 Rocker, Valve  
Cover Asm., Cylinder Head  
Gasket, Cylinder Head Cover  
Tube, Breather  
52 Nut_ Valve Adjusting  
53 Nut, Valve Lock  
54 Spring, Valve  
55 Starter Asm., Recoil  
56 Bolt  
Bolt  
Stud  
Stud  
Stud  
Pin  
57 Shroud  
58 Shroud, Cylinder Body  
59 Shield,Lower  
60 Protector, Oil  
61 Switch Asm., Stop Engine  
62 Bolt  
63 Bolt  
64 Collar  
65 Bolt  
66 Bolt  
67 Carburetor Asm.  
68 Gasket, Air Cleaner  
69 Gasket, Carburetor  
70 Plate, Carburetor Insulator  
71 Gasket, Carburetor Insulator  
72 Nut  
73 Cleaner, Air  
74 Bolt  
75 Gasket, Exhaust Outlet  
76 Nut  
77 Muffler Asm.  
78 Tank, Fuel  
79 Strainer, Fuel  
80 Cover, Fuel Tank  
81 Outlet Asm., Fuel Tank Oil  
82 Collar  
10 Bolt, Cylinder Head  
11 Plug, Spark  
12 Head Asm., Cylinder  
13 Crankcase Asm.  
14 Sensor, Engine Oil  
15 Gear Asm., Governor  
16 Arm, Governor  
17 Bolt, Drain Plug  
18 Washer  
19 Bearing  
20 Seal, Oil  
21 Washer  
22 Pin  
23 Bolt  
24 Cover, Crankcase  
25 Bearing  
26 Seal, Oil  
27 Gasket, Crankcase  
28 Pin  
29 Dipstick Asm., Oil  
30 Plug Asm., Engine Oil  
31 Bolt  
32 Crankshaft Asm.  
33 Clip, Piston Pin  
34 Piston  
83 Tube, Fuel  
84 Bolt  
85 Nut  
35 Pin, Piston  
36 Rod, Connecting  
37 Ring, The First  
38 Ring, The Second  
39 Ring Set, Oil  
40 Camshaft Asm.  
41 Valve, Exhaust  
42 Valve, Intake  
43 Seat, Valve Spring  
44 Retainer_ Exhaust Valve  
45 Rotator, Valve  
46 Guide, Seal  
86 Nut, Flywheel  
87 Pulley,Starter  
88 Impeller  
89 Flywheel Asm.  
90 Bolt  
91 Coil, Ignition  
92 Control Asm., Throttle  
93 Bolt  
94 Spring, Governor  
95 Rod, Governor  
96 Spring, Throttle Valve Returning  
97 Bolt, Governor Support  
98 Nut  
47 Tappet, Valve  
48 Lifter, Valve  
49 Plate Asm., Lifter Stopper  
50 Bolt, Valve Adjusting  
99 Support Asm., Governor  
Record Product’s Serial Number Here:  
Note: Some parts are listed and shown for  
illustration purposes only, and are not available  
individually as replacement parts.  
Note: If product has no serial number,  
record month and year of purchase instead.  
Page 22  
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68120 212cc Assembly Diagram  
Horizontal Engines  
For technical questions, please call 1-800-520-0882.  
Page 23  
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68121 212cc Parts List  
Part  
Description  
Qty.  
1
1
1
1
4
1
1
2
2
4
1
1
1
1
1
1
2
2
1
1
1
1
2
1
1
1
1
2
1
1
6
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
1
2
2
2
2
2
Part  
Description  
Qty.  
1
3
1
1
1
1
1
2
1
1
1
4
1
1
1
1
1
2
1
1
1
2
1
2
1
1
1
1
1
1
4
1
1
2
1
1
2
1
2
1
1
1
1
1
2
1
1
2
1
1
1
1
1
1
1
2
3
4
5
6
7
8
9
Gasket, Cylinder Head  
55 Starter Asm., Recoil  
Cover Asm., Cylinder Head  
Gasket, Cylinder Head Cover  
Tube, Breather  
56 Bolt  
57 Shroud  
58 Shroud, Cylinder Body  
59 Shield,Lower  
60 Protector, Oil  
61 Switch Asm., Stop Engine  
62 Bolt  
63 Bolt  
64 Collar  
65 Bolt  
66 Bolt  
67 Carburetor Asm.  
68 Gasket, Air Cleaner  
69 Gasket, Carburetor  
70 Plate, Carburetor Insulator  
71 Gasket, Carburetor Insulator  
72 Nut  
73 Cleaner, Air  
74 Bolt  
75 Gasket, Exhaust Outlet  
76 Nut  
77 Muffler Asm.  
78 Bolt  
79 Gasket, Auxiliary Air Valve Flange  
80 Valve, Muffler Auxiliary  
81 Tank, Fuel  
82 Strainer, Fuel  
83 Cap, Fuel  
84 Outlet Asm., Fuel Tank Oil  
85 Clamp  
86 Tube, Fuel  
87 Bolt  
88 Nut  
89 Vent, Vapor  
90 Hose, Vapor Rubber  
91 Band  
92 Collector, Vapor  
93 Clamp  
94 Hose, Air Cleaner Rubber  
95 Nut, Flywheel  
96 Pulley,Starter  
97 Impeller  
98 Flywheel Asm.  
99 Bolt  
100 Coil, Ignition  
101 Control Asm., Throttle  
102 Bolt  
103 Spring, Governor  
104 Rod, Governor  
105 Spring, Throttle Valve Returning  
106 Bolt, Governor Support  
107 Nut  
Bolt  
Stud  
Stud  
Stud  
Pin  
10 Bolt, Cylinder Head  
11 Plug, Spark  
12 Head Asm., Cylinder  
13 Crankcase Asm.  
14 Sensor, Engine Oil  
15 Gear Asm., Governor  
16 Arm, Governor  
17 Bolt, Drain Plug  
18 Washer  
19 Bearing  
20 Seal, Oil  
21 Washer  
22 Pin  
23 Bolt  
24 Cover, Crankcase  
25 Bearing  
26 Seal, Oil  
27 Gasket, Crankcase  
28 Pin  
29 Dipstick Asm., Oil  
30 Plug Asm., Engine Oil  
31 Bolt  
32 Crankshaft Asm.  
33 Clip, Piston Pin  
34 Piston  
35 Pin, Piston  
36 Rod, Connecting  
37 Ring, The First  
38 Ring, The Second  
39 Ring Set, Oil  
40 Camshaft Asm.  
41 Valve, Exhaust  
42 Valve, Intake  
43 Seat, Valve Spring  
44 Retainer_ Exhaust Valve  
45 Rotator, Valve  
46 Guide, Seal  
47 Tappet, Valve  
48 Lifter, Valve  
49 Plate Asm., Lifter Stopper  
50 Bolt, Valve Adjusting  
51 Rocker, Valve  
52 Nut_ Valve Adjusting  
53 Nut, Valve Lock  
54 Spring, Valve  
108 Support Asm., Governor  
Page 24  
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68121 212cc Assembly Diagram  
Horizontal Engines  
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Page 25  
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68136 346cc Parts List  
Part  
Description  
Qty.  
1
1
1
1
1
2
2
2
4
1
1
1
1
1
1
1
1
1
2
2
1
1
1
1
4
2
1
1
1
1
1
1
2
7
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
2
2
Part  
Description  
Qty.  
1
2
2
2
2
2
1
1
3
1
1
1
5
1
1
1
1
1
2
1
1
3
1
2
1
1
1
2
1
1
1
1
5
1
1
2
1
1
1
1
2
1
1
1
1
1
2
1
1
2
1
1
1
1
1
1
1
2
3
4
5
6
7
8
9
Gasket, Cylinder Head  
57 Plate Asm., Lifter Stopper  
58 Bolt, Valve Adjusting  
59 Rocker, Valve  
60 Nut, Valve Adjusting  
61 Nut, Valve Lock  
62 Spring, Valve  
63 Retainer, Valve Spring  
64 Starter Asm., Recoil  
65 Bolt  
Cover Asm., Cylinder Head  
Gasket, Cylinder Head Cover  
Tube, Breather  
Bolt Asm., Cylinder Head Cover  
Stud  
Stud  
Pin  
Bolt, Cylinder Head  
10 Plug, Spark  
66 Shroud  
67 Shroud, Cylinder Body  
68 Bolt  
11 Head Asm., Cylinder  
12 Crankcase Asm.  
13 Seal, Oil  
14 Sensor, Engine Oil  
15 Frame, Fuel Tank Installation  
16 Plug, Rubber  
17 Protector, Oil  
18 Bolt  
19 Washer_ Flat  
20 Bolt, Drain Plug  
21 Clip  
22 Arm, Governor  
23 Seal, Oil  
24 Pin  
25 Bolt  
26 Bolt  
27 Washer_ Flat  
28 Bearing  
29 Cover, Crankcase  
30 Gasket, Crankcase  
31 Plug Asm., Engine Oil  
32 Dipstick Asm., Oil  
33 Pin  
34 Bolt  
35 Bearing  
36 Gear Asm., Governor  
37 Seal, Oil  
38 Bearing  
39 Crankshaft Asm.  
40 Shaft Asm., Balancing  
41 Ring Set, Oil  
42 Clip, Piston Pin  
43 Piston  
69 Bolt  
70 Carburetor Asm.  
71 Gasket, Air Cleaner  
72 Gasket, Carburetor  
73 Plate, Carburetor Insulator  
74 Gasket, Inlet  
75 Nut  
76 Cleaner, Air  
77 Bolt  
78 Nut  
79 Gasket, Exhaust Outlet  
80 Nut  
81 Muffler Asm.  
82 Gasket, Aux. Air Valve Flange  
83 Valve, Muffler Aux. Air  
84 Bolt  
85 Tank, Fuel  
86 Strainer, Fuel  
87 Cover, Fuel Tank  
88 Outlet Asm., Fuel Tank Oil  
89 Collar  
90 Tube, Fuel  
91 Clamp  
92 Nut  
93 Valve, One Way  
94 Hose, Fuel Vapor Rubber  
95 Hose, Air Cleaner Rubber  
96 Collector, Fuel Vapor  
97 Bolt  
98 Cover, Fuel Vapor Collector  
99 Nut, Flywheel  
100 Pulley,Starter  
101 Impeller  
102 Flywheel Asm.  
103 Bolt  
104 Coil, Ignition  
105 Control Asm., Throttle  
106 Bolt  
107 Spring, Throttle Valve Returning  
108 Rod, Governor  
109 Support Asm., Governor  
110 Nut  
111 Bolt, Governor Support  
112 Spring, Governor  
44 Pin, Piston  
45 Rod, Connecting  
46 Ring, The First  
47 Ring, The Second  
48 Camshaft Asm.  
49 Valve, Exhaust  
50 Valve, Intake  
51 Seat, Valve Spring  
52 Retainer, Exhaust Valve  
53 Rotator, Valve  
54 Guide, Seal  
55 Tappet, Valve  
56 Lifter Asm., Valve  
Page 26  
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68136 346cc Assembly Diagram  
Horizontal Engines  
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Page 27  
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68306 420cc Parts List  
Part  
Description  
Gasket, Cylinder Head  
Cover Asm., Cylinder Head  
Gasket, Cylinder Head Cover  
Tube, Breather  
Bolt Asm., Cylinder Head Cover  
Stud  
Stud  
Qty.  
1
1
1
1
1
2
2
2
4
1
1
1
1
1
1
1
1
1
2
2
1
1
1
1
4
2
1
1
1
1
1
1
2
7
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
2
2
1
2
2
2
2
Part  
Description  
Qty.  
2
1
1
4
1
1
1
5
1
2
1
1
1
2
1
1
3
1
2
1
1
1
2
1
1
1
1
5
1
1
2
1
1
1
1
2
1
1
1
1
1
1
1
1
2
1
2
1
2
1
1
1
1
1
1
1
2
1
2
1
2
1
2
3
4
5
6
7
8
9
62 Spring, Valve  
63 Retainer, Valve Spring  
64 Starter Asm., Recoil  
65 Bolt  
66 Shroud  
67 Shroud, Cylinder Body  
68 Bolt  
Pin  
69 Bolt  
Bolt, Cylinder Head  
70 Carburetor Asm.  
71 Gasket, Air Cleaner  
72 Gasket, Carburetor  
73 Plate, Carburetor Insulator  
74 Gasket, Inlet  
75 Nut  
76 Cleaner, Air  
77 Bolt  
78 Nut  
79 Gasket, Exhaust Outlet  
80 Nut  
10 Plug, Spark  
11 Head Asm., Cylinder  
12 Crankcase Asm.  
13 Seal, Oil  
14 Sensor, Engine Oil  
15 Frame, Fuel Tank  
16 Plug, Rubber  
17 Protector, Oil  
18 Bolt  
19 Washer_ Flat  
20 Bolt, Drain Plug  
21 Clip  
22 Arm, Governor  
23 Seal, Oil  
24 Pin  
25 Bolt  
26 Bolt  
27 Washer_ Flat  
28 Bearing  
29 Cover, Crankcase  
30 Gasket, Crankcase  
31 Plug Asm., Engine Oil  
32 Dipstick Asm., Oil  
33 Pin  
34 Bolt  
35 Bearing  
36 Gear Asm., Governor  
37 Seal, Oil  
38 Bearing  
39 Crankshaft Asm.  
40 Shaft Asm., Balancing  
41 Ring Set, Oil  
42 Clip, Piston Pin  
43 Piston  
81 Muffler Asm.  
82 Gasket, Aux. Air Intake Valve  
83 Valve, Aux. Air Intake  
84 Bolt  
85 Tank, Fuel  
86 Strainer, fuel  
87 Cover, Fuel Tank  
88 Outlet Asm., Fuel Tank Oil  
89 Collar  
90 Tube, Fuel  
91 Clip  
92 Nut  
93 Valve, One Way  
94 Hose, Fuel Vapor Rubber  
95 Hose, Air Cleaner Rubber  
96 Collector, Fuel Vapor  
97 Bolt  
98 Cover, Fuel Vapor Collector  
99 Nut, Flywheel  
100 Pulley, Starter  
101 Impeller  
102 Flywheel Asm.  
103 Bolt  
104 Cap, Spark Plug  
105 Coil Asm., Charge  
106 Bolt  
107 Coil, Ignition  
108 Bolt  
109 Control Asm., Throttle  
110 Bolt  
111 Spring, Throttle Returning  
112 Rod, Governor  
113 Support Asm., Governor  
114 Nut  
115 Bolt, Governor Support  
116 Spring, Governor  
117 Motor Asm.,Starting  
118 Bolt  
44 Pin, Piston  
45 Rod, Connecting  
46 Ring, The First  
47 Ring, The Second  
48 Camshaft Asm.  
49 Valve, Exhaust  
50 Valve, Intake  
51 Seat, Valve Spring  
52 Retainer, Exhaust Valve  
53 Rotator, Valve  
54 Guide, Seal  
55 Tappet, Valve  
56 Lifter Asm., Valve  
57 Plate Asm., Lifter Stopper  
58 Bolt, Valve Adjusting  
59 Rocker, Valve  
60 Nut, Valve Adjusting  
61 Nut, Valve Lock  
119 Relay, Starting  
120 Bolt  
121 Switch,Control  
122 Bolt  
Page 28  
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68306 420cc Assembly Diagram  
Horizontal Engines  
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Page 29  
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Mounting Hole Diagrams  
Note: Not to scale.  
ITEM 68120 / 68121 212cc  
6.38 in. / 162mm  
2.6 in. / 66mm  
ITEM 68136 346cc and ITEM 68306 420cc  
7.72 in. / 196mm  
4.13 in. / 105mm  
Page 30  
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Power Take-Off Diagrams  
Note: Not to scale.  
ITEM 68120 / 68121 212cc  
2.43 in. / 61.7mm  
5/16-24UNF  
1.79 in. / 45.5mm  
0.67 in.  
/ 17mm  
0.1875 in. / 4.78mm  
Ø0.75 in. / 19.05mm  
Ø3.625 in. / 92mm  
4x5/16-24UNF  
ITEM 68136 346cc and ITEM 68306 420cc  
Ø3.625 in. / 92mm  
Ø6.5 in. / 165.1mm  
(30°)  
3.48 in. / 88.5mm  
(30°)  
0.25 in. / 6.35mm  
Ø1 in. / 25.4mm  
Ø5.75 in.  
/ 146mm  
1.1 in. / 28mm  
2.2 in. / 56mm  
2.84 in. / 72.2mm  
Ø5 in. /  
127mm  
(45°)  
(45°)  
Horizontal Engines  
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Page 31  
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3491 Mission Oaks Blvd. • PO Box 6009 • Camarillo, CA 93011 • (800) 520-0882  
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