John Deere Snow Blower ST0320 User Manual

ST0320  
Snow Thrower  
OPERATOR’S  
MANUAL  
MTF-041007C  
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RULES FOR SAFE OPERATION  
IMPORTANT  
WARNING: Always disconnect the spark plug wire and place it where it cannot make contact with  
spark plug to prevent accidental starting during: Preparation, Maintenance, or Storage of your  
snowthrower.  
Safe Operation Practices for Snowthrowers  
As Recommended By: American National Standards Institute.  
a. Use an approved fuel container.  
b. Never remove fuel tank cap or add fuel to a running en-  
gine (motor) or hot engine (motor).  
Engine Exhaust, some of its constituents, and  
certain vehicle components contain or emit  
chemicals known to the State of California to  
cause cancer and birth defects or other repro-  
ductive harm.  
c. Fill fuel tank outdoors with extreme care. Never fill fuel  
tank indoors.  
d. Replace fuel cap securely and wipe up spilled fuel.  
e. Never store fuel or snowthrower with fuel in the tank  
inside of a building where fumes may reach an open  
flame or spark.  
f. Check fuel supply before each use, allowing space for  
expansion as the heat of the engine (motor) and/or sun  
can cause fuel to expand.  
Battery posts, terminals and related accesso-  
ries contain lead and lead compounds, chemi-  
cals known to the State of California to cause  
cancer and birth defects or other reproductive  
harm. WASH HANDS AFTER HANDLING.  
5. For all units with electric starting motors use electric  
starting extension cords certified CSA/UL. Use only with  
a receptacle that has been installed in accordance with  
local inspection authorities.  
6. Adjust the snowthrower height to clear gravel or crushed  
rock surface.  
7. Never attempt to make any adjustments while the en-  
gine (motor) is running (except when specifically recom-  
mended by manufacturer).  
IMPORTANT: Safety standards require operator presence  
controls to minimize the risk of injury. Your snowthrower is  
equipped with such controls. Do not attempt to defeat the  
function of the operator presence control under any cir-  
cumstances.  
8. Let engine (motor) and snowthrower adjust to outdoor  
temperatures before starting to clear snow.  
9. Always wear safety glasses or eye shields during oper-  
ation or while performing an adjustment or repair to pro-  
tect eyes from foreign objects that may be thrown from  
the snowthrower.  
Training  
1. Read the operating and service instruction manual care-  
fully. Be thoroughly familiar with the controls and the  
proper use of the equipment. Know how to stop the unit  
and disengage the controls quickly.  
2. Never allow children to operate the equipment. Never  
allow adults to operate the equipment without proper  
instruction.  
Operation  
1. Do not operate this machine if you are taking drugs or  
other medication which can cause drowsiness or affect  
your ability to operate this machine.  
3. Keep the area of operation clear of all persons, particu-  
larly small children and pets.  
2. Do not use this machine if you are mentally or physically  
unable to operate this machine safely.  
4. Exercise caution to avoid slipping or falling especially  
when operating in reverse.  
3. Do not put hands or feet near or under rotating parts.  
Keep clear of the discharge opening at all times.  
4. Exercise extreme caution when operating on or crossing  
gravel drives, walks or roads. Stay alert for hidden haz-  
ards or traffic.  
5. After striking a foreign object, stop the engine (motor),  
remove the wire from the spark plug, thoroughly inspect  
snowthrower for any damage, and repair the damage  
before restarting and operating the snowthrower.  
6. If the unit should start to vibrate abnormally, stop the  
engine (motor) and check immediately for the cause.  
Vibration is generally a warning of trouble.  
Preparation  
1. Thoroughly inspect the area where the equipment is to  
be used and remove all doormats, sleds, boards, wires,  
and other foreign objects.  
2. Disengage all clutches before starting the engine  
(motor).  
3. Do not operate the equipment without wearing adequate  
winter outer garments. Wear footwear that will improve  
footing on slippery surfaces.  
4. Handle fuel with care; it is highly flammable.  
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RULES FOR SAFE OPERATION  
7. Stop the engine (motor) whenever you leave the operat-  
Maintenance And Storage  
ing position, before unclogging the auger/impeller hous-  
ing or discharge chute and when making any repairs,  
adjustments, or inspections.  
1. Check shear bolts and other bolts at frequent intervals  
for proper tightness to be sure the equipment is in safe  
working condition.  
8. When cleaning, repairing, or inspecting, make certain  
the auger/impeller and all moving parts have stopped  
and all controls are disengaged. Disconnect the spark  
plug wire and keep the wire away from the spark plug to  
prevent accidental starting.  
2. Never store the snowthrower with fuel in the tank inside  
a building where ignition sources are present such as  
hot water and space heaters, clothes dryers, and the  
like. Allow the engine (motor) to cool before storing in  
any enclosure.  
9. Take all possible precautions when leaving the snow-  
thrower unattended. Disengage the auger/ impeller, stop  
engine (motor), and remove key.  
3. Always refer to operator’s guide instructions for import-  
ant details if the snowthrower is to be stored for an ex-  
tended period.  
10.Do not run the engine (motor) indoors, except when  
starting the engine (motor) and for transporting the  
snowthrower in or out of the building. Open the outside  
doors; exhaust fumes are dangerous (containing CAR-  
BON MONOXIDE, an ODORLESS and DEADLY GAS).  
4. Maintain or replace safety and instruction labels, as  
necessary.  
5. Run the snowthrower a few minutes after throwing  
snow to prevent freeze- up of the auger/impeller.  
11. Do not clear snow across the face of slopes. Exercise  
extreme caution when changing direction on slopes. Do  
not attempt to clear steep slopes.  
12.Never operate the snowthrower without proper guards,  
plates or other safety protective devices in place.  
WARNING: Avoid  
injury from rotating  
auger- keep hands,  
feet, and clothing  
away.  
13.Never operate the snowthrower near enclosures, auto-  
mobiles, window wells, drop- offs, and the like without  
proper adjustment of the snow discharge angle. Keep  
children and pets away.  
14.Do not overload the machine capacity by attempting to  
clear snow at too fast a rate.  
15.Never operate the machine at high transport speeds on  
slippery surfaces. Look behind and use care when back-  
ing up.  
16.Never direct discharge at bystanders or allow anyone in  
front of the unit.  
WARNING: Do not use  
hands to unclog discharge  
chute.  
17.Disengage power to the collector/impeller when snow-  
thrower is transported or not in use.  
18.Use only attachments and accessories approved by the  
manufacturer of the snowthrower (such as tire chains,  
electric start kits, ect.).  
Stop engine/motor  
before removing debris.  
Do not walk in front  
of running machine.  
19.Never operate the snowthrower without good visibility or  
light. Always be sure of your footing and keep a firm  
hold on the handles. Walk;never run.  
Do not discharge at  
bystanders.  
20.Do not over- reach. Keep proper footing and balance at  
all times.  
Keep people and pets  
a safe distance from the  
machine.  
21.Exercise caution if operating on steep sloping surfaces.  
22.This snowthrower is for use on sidewalks, driveways  
and other ground level surfaces.  
Before leaving machine,  
shut off engine/ motor  
and remove key.  
23.Do not use the snowthrower on surfaces above ground  
level such as roofs of residences, garages, porches or  
other such structures or buildings.  
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TABLE OF CONTENTS  
SAFETY DECALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6  
WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7  
OWNER’S INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7  
ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8  
PARTS BAGS CONTENTS: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8  
TOOLS REQUIRED FOR ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . 8  
HOW TO REMOVE THE SNOW THROWER FROM THE CARTON . 8  
HOW TO ASSEMBLE THE HANDLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8  
HOW TO ASSEMBLE THE LOWER CHUTE . . . . . . . . . . . . . . . . . . . . . . 9  
HOW TO ASSEMBLE THE CHUTE CONTROL ROD . . . . . . . . . . . . . . 9  
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10  
ENGINE AND SNOW THROWER OPERATING CONTROLS . . . . . . . 10  
SNOW BLOWER OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11  
HOW TO STOP THE SNOW THROWER . . . . . . . . . . . . . . . . . . . . . . . . 11  
HOW TO CONTROL SNOW DISCHARGE . . . . . . . . . . . . . . . . . . . . . . . 11  
HOW TO THROW SNOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11  
HOW TO MOVE FORWARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11  
HOW TO MIX THE FUEL MIXTURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12  
BEFORE STARTING THE ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13  
HOW TO STOP THE ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13  
HOW TO START THE ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13  
HOW TO REMOVE SNOW FROM THE AUGER HOUSING . . . . . . . . 14  
SNOW THROWING TIPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14  
SERVICE RECOMMENDATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15  
LUBRICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15  
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16  
HOW TO REMOVE THE TOP COVER . . . . . . . . . . . . . . . . . . . . . . . . . . . 16  
HOW TO REMOVE THE BELT COVER . . . . . . . . . . . . . . . . . . . . . . . . . 16  
HOW TO ADJUST THE CHUTE CRANK . . . . . . . . . . . . . . . . . . . . . . . . . 17  
HOW TO ADJUST THE AUGER CONTROL CABLE . . . . . . . . . . . . . . . 17  
HOW TO REPLACE THE DRIVE BELT . . . . . . . . . . . . . . . . . . . . . . . . . . 18  
HOW TO REPLACE THE AUGER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19  
TO ADJUST THE CARBURETOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20  
TO ADJUST OR REPLACE THE SPARK PLUG . . . . . . . . . . . . . . . . . . . 20  
STORAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21  
TROUBLE SHOOTING CHART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22  
REPLACEMENT PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23  
PARTS SCHEMATICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24  
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36  
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SAFETY DECALS  
the meaning, then thoroughly read all safety and operation  
instructions in this Owner’s Manual or contact your local  
dealer.  
WARNING: If safety decals are dam-  
aged or missing, replace immediately.  
If any safety decals become worn or damaged and cannot  
be read, order replacement decals from your local dealer.  
Look for this symbol to indicate important safe-  
ty precautions. This symbol indicates: “Atten-  
tion! Become Alert! Your Safety Is At Risk.”  
Identifying Your Snowthrower  
The snowthrower has two (2) identifying numbers: (1) unit  
model number: (2) unit serial number. The two preceding  
numbers are required to insure that the proper replace-  
ment parts are obtained when required. If you have any  
questions concerning parts, service, or technical data, con-  
tact the dealer where the unit was purchased.  
Before operation of your snowthrower, read the safety de-  
cals as shown on your snowthrower. The cautions and  
warnings are for your safety. To avoid a personal injury or  
damage to your snowthrower, understand and follow all  
safety decals. If you have any questions regarding the  
meaning or how to comply with the instructions, do not op-  
erate until you understand the purpose for the warning or  
danger given in the safety decal. If you do not understand  
For complete warranty information refer to the warranty in  
the Owner’s Information section of this manual.  
Figure 1  
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OWNER’S INFORMATION  
THREE YEAR LIMITED WARRANTY  
Murray warrants to the original purchaser of this Frontier Branded Snowthrower that this unit shall be free from defects in  
material and workmanship under normal use and service for a period of Three (3) Year from the date of purchase; however,  
this warranty does not cover accessories (such as electric starters) and Normal Wear Parts (except as noted below) as the  
companies that manufacture these items furnish their own warranties and provide service through their authorized field  
service facilities. For additional information, see the warranties covering these particular parts. If you are uncertain whether  
your unit contains or is equipped with one or more of these parts, consult your dealer prior to purchase. Subject to the terms  
and conditions noted in this Limited Warranty, we shall, at our option, repair or replace at no cost to the original purchaser  
any part covered by this Limited Warranty during the applicable warranty period.  
Normal Wear Parts are defined as drive belts, augers, shear pins, tires and headlights. These parts are warranted to be free  
from defects in material and workmanship as delivered with the product. Any claim for repair or replacement of Normal Wear  
Parts must be made within thirty (30) days of the date of purchase. No claims involving damage caused from material use,  
abuse or misuse will be honored.  
This Murray Three (3) Year Limited Warranty for your Frontier Branded Snowthrower is your exclusive remedy; however,  
this warranty is void or does not apply to any unit that has been tampered with, altered, misused, abused. If used for  
commercial and/or professional (non-homeowner) uses, the duration of this warranty is ninety (90) days after the date of  
purchase. Your warranty does not cover minor mechanical adjustments which are not due to any defect in material or  
workmanship. For assistance in making such adjustments, consult your Operator’s Manual.  
The engine on this Frontier Branded Snowthrower is warranted to the original purchaser for only a Two (2) Year Limited  
Warranty. See your engine manual for information regarding the warranty policy and items covered under warranty. See  
MT  
your authorized John Deere/Frontier Dealer for service or replacement parts.  
To make a claim under this Murray Three (3) Year Limited Warranty for your Frontier Branded Snowthrower, return the unit  
(or if authorized in advance, the defective part) along with your proof of purchase to an Authorized John Deere/Frontier Dealer  
near you. To locate the nearest Authorized John Deere/Frontier Dealer, check the Yellow Page listings in your local telephone  
directory. If you return the entire unit, John Deere/Frontier will repair all warranty items. If authorize to return the defective  
part only, John Deere/Frontier will either replace or repair the part. This Murray Three (3) Year Limited Warranty for your  
Frontier Branded Snowthrower gives you specific legal rights, and you may also have other rights which vary from state to  
state. This Limited Warranty is given in lieu of all other expressed and implied warranties including the implied  
warranty of merchantability and warranty of fitness for a particular purpose. If you need additional information on this  
written warranty or assistance in obtaining service, contact you local John Deere/Frontier Dealer.  
FOR YOUR RECORDS  
DATE PURCHASED:  
MODEL NO:  
SERIAL NO:  
STORE WHERE PURCHASED:  
ADDRESS:  
CITY:  
STATE:  
TELEPHONE :  
Record this information about your unit so that you will  
be able to provide it in case of loss or theft.  
7
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ASSEMBLY  
WARNING: Always wear safety glasses or eye  
shields while assembling the snowthrower.  
PARTS BAGS CONTENTS:  
1 - 2.6 ounces 2-cycle oil  
1 - Owner’s Manual  
Figure 2 shows the snow thrower in the operating position.  
TOOLS REQUIRED FOR ASSEMBLY  
References to the right or left hand side of the snow throw-  
er are from the viewpoint of the operator’s position behind  
the unit.  
1-Knife  
1-Pliers  
5. Cut and discard the cable tie from the lower end of the  
HOW TO REMOVE THE SNOW THROWER  
FROM THE CARTON  
chute control rod.  
6. Turn the chute deflector around toward the front of the  
1. Locate all parts that are packed separately and remove  
from the carton.  
snow thrower.  
2. Remove and discard the packing material from around  
the snow thrower.  
3. Cut down all four corners of the carton and lay the side  
panels flat.  
4. Hold onto the lower handle and pull the snow thrower off  
the carton.  
CAUTION: DO NOT back over cables.  
5. Remove the packing material from the handle assembly.  
HOW TO ASSEMBLE THE HANDLE  
1. Remove the packing material from the upper and lower  
handles.  
2. Loosen the knobs on each side of the handle. (See  
Figure 2)  
3. Raise the upper handle to the operating position. Hold  
the upper handle apart to prevent scratching the lower  
handle.  
NOTE: Make sure the cables are not caught between  
the upper and lower handle.  
4. Tighten the knobs.  
8
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ASSEMBLY  
HOW TO ASSEMBLE THE LOWER CHUTE  
For shipping purposes, some models are shipped with the  
rear nut and bolt removed from the lower chute. If the low-  
er chute is not attached, assemble as follows.  
Bolt  
Nut  
1. Use the bolt and nut found in the parts bag to attach  
the lower chute.  
Lower Chute  
2. Tip the lower chute backward until the hole in the chute  
ring is aligned with the hole in the lower chute. See  
Figure 3  
3. Attach the lower chute with bolt and nut. Make sure  
the nut is tight.  
Figure 3  
HOW TO ASSEMBLE  
THE CHUTE CONTROL ROD  
Worm Gear  
Chute Control Rod  
1. Remove the cotter pin, flat washer, and wave washer  
from the end of the chute control rod. DO NOT  
DISCARD. (See Figure 4)  
2. Mount the end of the chute control rod through the  
hole in the control rod bracket. Make sure the worm  
gear is aligned with the notches in the discharge  
chute.  
Wave Washer  
Flat Washer  
Cotter Pin  
Notches  
3. Fasten the chute control rod to the control rod  
bracket with cotter pin, flat washer, and wave  
washer.  
Control Rod  
Bracket  
Discharge  
Chute  
4. Rotate the chute control rod clockwise and  
counterclockwise. Make sure the discharge chute  
rotates freely.  
Figure 4  
While learning how to use your snow thrower, pay extra  
attention to the following important items:  
n CHECKLIST  
Before you operate your new snow thrower, to ensure that  
you receive the best performance and satisfaction from  
this quality product, please review the following checklist:  
n Make sure the fuel tank is filled with the correct mixture  
(50:1 ratio) of gasoline and oil.  
n Become familiar with the location of all controls and un-  
n All assembly instructions have been completed.  
n The discharge chute rotates freely.  
derstand their function.  
n Before starting the engine, make sure all controls oper-  
n No remaining loose parts in carton.  
ate correctly.  
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OPERATION  
KNOW YOUR SNOW THROWER  
READ THIS OWNER’S MANUAL AND SAFETY RULES BEFORE OPERATING YOUR SNOW THROWER. Compare the  
illustrations with your SNOW THROWER to familiarize yourself with the location of various controls and adjustments.  
Save this manual for future reference.  
Chute Control Rod  
Auger Drive Lever  
Recoil  
Starter  
Handle  
Chute Deflector  
Discharge  
Chute  
Primer  
Button  
Ignition Switch Key  
Recoil  
Starter  
Spark Plug  
Access Panel  
Choke Control  
Figure 5  
ENGINE AND SNOW THROWER OPERATING CONTROLS  
Auger Drive Lever - Starts and stops the auger.  
Ignition Switch Key - Must be inserted and turned to the  
ON position to start the engine.  
Chute Control Rod - Changes the direction of snow throw-  
ing through the discharge chute.  
Recoil Starter Handle - Starts the engine manually.  
Choke Control - Used to start a cold engine.  
Chute Deflector - Changes the distance the snow is  
thrown.  
Primer Button - Injects fuel directly into the carburetor  
manifold for fast starts in cold weather.  
Discharge Chute - Changes the direction the snow is  
Spark Plug Access Panel - Aides in the removal of the  
thrown.  
spark plug.  
10  
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OPERATION  
NOTE: If the snow thrower continues to slowly move  
SNOWTHROWER OPERATION  
forward, see “How To Adjust The Auger Control  
Cable” in the Service And Adjustment Section.  
The most effective use of the snowthrower will be established  
by experience, taking into consideration the terrain, wind  
conditions and building location which will determine the  
direction of the discharge chute.  
2. To stop the engine, move the ignition key to the OFF  
position.  
NOTE: Do not discharge snow toward a building as  
hidden objects could be thrown with sufficient force to  
cause damage.  
HOW TO CONTROL SNOW DISCHARGE  
1. Turn the chute control rod to set the direction of the  
snow throwing. (See Figure 5)  
WARNING: Read Owner’s Manual before oper-  
ating machine. This machine can be dangerous  
if used carelessly.  
2. Loosen the wing knob on the chute deflector and move  
the deflector to set the distance. Move the deflector (Up)  
for more distance, (Down) for less distance. Then tighten  
the wing knob (See Figure 6).  
Never operate the snowthrower without all guards,  
covers, and shields in place.  
Never direct discharge toward windows or allow by-  
standers near machine while engine is running.  
Stop the engine whenever leaving the operating posi-  
tion.  
Deflector Down  
Deflector Up  
Disconnect spark plug before unclogging the impeller  
housing or the discharge chute and before making re-  
pairs or adjustments.  
When leaving the machine, remove the ignition key.  
To reduce the risk of fire, keep the machine clean and  
free from spilled gas, oil and debris.  
Wing Knob  
HOW TO STOP THE SNOWTHROWER  
Figure 6  
1. To stop throwing snow, release the auger drive lever.  
(See Figure 7).  
NOTE: If the auger continues to rotate, see “How To  
Adjust The Auger Control Cable” in the Service and  
Adjustments section.  
HOW TO THROW SNOW  
1. Engage the auger drive lever. (See Figure 7).  
2. To stop throwing snow, release the auger drive lever.  
HOW TO MOVE FORWARD  
1. Hold the auger drive lever against the handle (See  
Figure 7). The auger will begin rotating.  
Auger  
Drive Lever  
2. To go forward, raise the handle to allow the rubber au-  
ger blades to contact the ground. Maintain a firm hold on  
the handle as the snow thrower starts to move forward.  
Guide the snow thrower by moving the handle either left  
or right. Do not attempt to push the snow thrower.  
“Z” Hook  
Figure 7  
3. To stop, release the auger drive lever.  
11  
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OPERATION  
Mix gasoline and oil as follows:  
BEFORE STARTING THE ENGINE  
WARNING: Experiences indicates that alcohol  
blended fuels (called gasohol or those using  
ethanol or methanol) can attract moisture  
1. Pour one (1) U.S. quart of fresh, clean, unleaded auto-  
motive gasoline into a one gallon size gasoline con-  
tainer.  
which leads to separation and formation of acids dur-  
ing storage. Acidic gas can damage the fuel system  
of an engine while in storage.  
2. Add 2.6 ounces of clean, high quality, two-cycle oil to  
the gasoline container.  
NOTE: To avoid engine problems, the fuel system  
must be emptied before storage for 30 days or longer.  
Start the engine and let it run until the fuel lines and  
carburetor are empty. Use the carburetor bowl drain  
to empty residual gasoline from the float chamber.  
Use fresh fuel next season. See the Storage section in  
this manual for additional information.  
IMPORTANT: Do not use outboard motor oil or  
multi-viscosity oils,such as 10W-30 or 10W-40.  
3. Install the fuel cap onto the gasoline container. Vigor-  
ously shake the gasoline container to mix the oil with  
the gasoline.  
4. Add an additional three (3) U.S. quarts of gasoline to  
the gallon container. Again shake the gasoline contain-  
er.  
Never use engine or carburetor cleaner products in the  
fuel tank or permanent damage can occur.  
WARNING: Gasoline is flammable. Always use  
caution when handling or storing gasoline.  
Do not fill fuel tank while snow thrower is run-  
ning, when it is hot, or when snow thrower is in an  
enclosed area.  
Keep away from open flame or an electrical spark and  
do not smoke while filling the fuel tank.  
Never fill the tank completely. Fill the tank to within  
1/4”-1/2” from the top to provide space for expansion  
of fuel.  
Always fill fuel tank outdoors and use a funnel or  
spout to prevent spilling.  
Make sure to wipe up any spilled fuel before stating  
the engine.  
HOW TO MIX THE FUEL MIXTURE  
The two cycle engine, used on this snow thrower, requires  
a mixture of gasoline and oil for lubrication of the bearings  
and other moving parts. The correct fuel mixture ratio is  
50:1 (2.6 oz. oil per one gallon of gas - see the Fuel Mix-  
ture Chart). Gasoline and oil must be pre-mixed in a clean  
gasoline container. Always use fresh, clean, unleaded gas-  
oline.  
FUEL MIXTURE CHART (mixture 50:1)  
U.S.  
IMPERIAL  
SI. (Metric)  
GAS  
OIL  
GAS  
1 Gal.  
OIL  
GAS  
OIL  
Store gasoline in a clean, approved container and  
keep the cap in place on the container.  
1 Gal.  
2.6  
oz.  
3.1 oz.  
4
liter  
80  
ML  
Do not fill the fuel tank with gasoline that does not have oil mixed in it. Shake the gasoline container before  
each filling of the fuel tank.  
Add more gas  
(3 U. S. Quarts)  
1 U.S.  
Gallon  
Special  
Gasoline  
1 U.S. Gallon container  
Figure 8  
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OPERATION  
BEFORE STARTING THE ENGINE  
1. Before you service or start the engine, familiarize yourself  
with the snow thrower. Be sure you understand the func-  
tion and location of all controls.  
2. Be sure that all fasteners are tight.  
3. Before starting the engine, make sure all controls operate  
correctly.  
HOW TO STOP THE ENGINE  
To stop the engine, move the ignition key to the stop position.  
NOTE: Allow the engine to warm up for several minutes  
before blowing snow in temperatures below 05F.  
HOW TO START THE ENGINE  
COLD START  
1. Fill the fuel tank with a fresh, clean fuel mixture. See “How  
To Mix The Fuel Mixture”.  
WARM START  
If restarting a warm engine after a short shutdown, leave  
choke at “OFF” and do not push the primer button. If the en-  
gine fails to start, follow the Cold Start instructions.  
2. Move the choke control to FULL position.  
3. Make sure the auger drive lever is in the disengaged (re-  
leased) position.  
WARNING: Never run engine indoors or in en-  
closed, poorly ventilated areas. Engine exhaust  
contains CARBON MONOXIDE, AN ODORLESS  
AND DEADLY GAS. Keep hands, feet, hair and loose  
clothing away from any moving parts on engine and  
snow thrower.  
4. Insert the ignition key and turn to the ON position.  
5. Move the choke control to the full choke position.  
6. Push the primer button while covering the vent hole as  
follows: Remove finger from primer button between  
primes.  
The temperature of muffler and nearby areas may ex-  
ceed 1505F. Avoid these areas.  
S
Do not prime if temperature above 50° F (10° C).  
DO NOT allow children or young teenagers to operate  
or be near snow thrower while it is operating.  
S
Push twice if temperature is 50° F (10° C) to  
15°F (-10° C).  
WARNING: Do not attempt to remove any item  
that may become lodged in auger without taking  
the following precautions:  
S
S
Push four times if temperature is below 15° F (-10° C).  
Push five time if temperature is below 0° F (-18° C).  
7. Rapidly pull the recoil starter handle. Do not allow the  
recoil starter handle to snap back. Slowly return the re-  
coil starter handle.  
S
S
Release auger drive lever.  
Move the ignition lever to the stop position to stop the  
engine.  
8. If the engine does not start in 5 or 6 tries, See the “Trouble  
Shooting Chart” Instructions.  
S
S
Disconnect spark plug wire.  
9. As the engine warms up, move the choke control to 1/2  
choke position. When the engine runs smoothly, move the  
choke control to the off position.  
Do not place your hands in the auger or discharge  
chute. Use a pry bar.  
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OPERATION  
HOW TO REMOVE SNOW FROM THE AUGER  
HOUSING  
WARNING: Do not attempt to remove snow or  
debris that may become lodged in auger  
housing without taking the following precau-  
tions.  
1. Release the auger drive lever.  
2. Remove the ignition key.  
3. Disconnect the spark plug wire.  
4. Do not place your hands in the auger housing or the dis-  
charge chute. Use a pry bar to remove any snow or de-  
bris.  
10. After each snow throwing job, allow the engine to run for  
a few minutes. The snow and accumulated ice will melt off  
the engine.  
SNOW THROWING TIPS  
1. When the handle is raised, the auger blades will engage  
the ground and the snow thrower will move forward. When  
the auger drive lever is released, the auger blades will  
stop. If the blades do not stop, see “How To Adjust The Au-  
ger Control Cable” in the Service And Adjustment section.  
11. Clean the snow thrower after each use.  
12. Remove ice, snow and debris from the entire snow throw-  
er. Flush with water to remove all salt or other chemicals.  
Wipe snow thrower dry.  
2. Most efficient snow throwing is accomplished when the  
snow is removed immediately after if falls.  
DRY AND AVERAGE SNOW  
3. For complete snow removal, slightly overlap each pre-  
vious path.  
1. Snow up to eight inches deep can be removed rapidly and  
easily by walking at a moderate rate. For snow or drifts of  
a greater depth,slow your pace to allow the discharge  
chute to dispose of the snow as rapidly as the auger re-  
ceives the snow.  
4. Whenever possible, discharge the snow down wind.  
5. The distance the snow will be discharged can be adjusted  
by moving the discharge chute deflector. Raise the deflec-  
tor for more distance or lower the deflector for less dis-  
tance.  
2. Plan to have the snow discharged in the direction the wind  
is blowing.  
6. In windy conditions, lower the chute deflector to direct the  
discharged snow close to the ground where it is less likely  
to blow into unwanted areas.  
WET PACKED SNOW  
Move slowly into wet, packed snow. If the wet, packed snow  
causes the auger to slow down or the discharge chute begins  
to clog, back off and begin a series of short back and forth  
jabs into the snow. These short back and forth jabs, four to six  
inches, will “belch” the snow from the chute.  
7. For safety and to prevent damage to the snow thrower,  
keep the area to be cleared free of stones, toys and other  
foreign objects.  
8. Do not use the auger propelling feature when clearing  
gravel or crushed rock driveways. Move the handle down  
to slightly raise the auger.  
SNOW BANKS AND DRIFTS  
In snow of greater depth than the unit, use the same “jabbing”  
technique described above. Turn the discharge chute away  
from the snow bank. More time will be required to remove  
snow of this type than level snow.  
9. The forward speed of the snow thrower is dependent on  
the depth and weight of the snow. Experience will estab-  
lish the most effective method of using the snow thrower  
under different conditions.  
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SERVICE RECOMMENDATIONS  
SERVICE RECOMMENDATIONS  
FIRST  
2
HOUR  
BEFORE  
EACH  
USE  
EVERY  
5
HOURS  
EVERY  
10  
HOURS  
EVERY  
25  
HOURS  
BEGINNING  
EACH  
SEASON  
BEFORE  
STORAGE  
PROCEDURE  
OFTEN  
S
N
O
W
T
H
R
O
W
E
Tighten all screws and nuts  
Lubricate Chute Control  
Flange  
Check Auger Drive Cable  
Adjustment  
(See Cable Adjustment)  
R
Check Drive Belt  
The warranty on this snowthrower does not cover items that  
have been subjected to operator abuse or negligence. To re-  
ceive full value from the warranty, operator must maintain  
snowthrower as instructed in this manual. The following Ser-  
vice Recommendations is supplied to assist operator to  
properly maintain snow thrower. This is a check list only. Ad-  
justment referred to will be found in the MAINTENANCE sec-  
tion of this manual.  
LUBRICATION  
Before Storage  
1. Lubricate the chute control flange. Apply a clinging  
type of grease such as Lubriplate.  
AFTER EACH USE  
1. Check for any loose or damaged parts.  
Chute Control  
Flange  
2. Tighten any loose fasteners.  
3. Check and maintain the auger.  
4. After each use, remove all snow and slush off the  
snowthrower to prevent freezing of auger or controls.  
5. Check controls to make sure they are functioning  
properly.  
Figure 9  
6. If any parts are worn or damaged, replace immediately.  
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MAINTENANCE  
HOW TO REMOVE THE TOP COVER  
Top Cover  
1. Remove the screws from the top cover.  
2. Remove the top cover.  
3. To install the top cover, reverse the above steps.  
Screws  
Figure 10  
HOW TO REMOVE THE BELT COVER  
1. The belt cover is fastened with ten screws. Remove all  
3. Remove the belt cover.  
ten screws.  
4. To install the belt cover, reverse the above steps.  
2. There are five screws on the front of the belt cover.  
Three screws on the bottom of the belt cover. Two  
screws on the top of the belt cover.  
NOTE: One screw is shorter than the other screws.  
Make sure to install screw in the correct location.  
Belt Cover  
3
Screws  
Figure 11  
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MAINTENANCE  
WARNING: To prevent accidental starting when  
making any adjustments or repairs, always dis-  
connect the spark plug wire and place it where  
it cannot make contact with the spark plug .  
HOW TO ADJUST THE CHUTE CRANK  
Crank Adjusting  
Bracket  
Nut  
If the chute crank will not rotate fully to the left or right, adjust  
as follows.  
Flange  
1/8” (3mm)  
1. Remove the top cover. See “How To Remove The Top  
Cover”.  
Worm Gear  
2. Loosen the nuts.  
3. Move the crank adjusting bracket to allow 1/8 inch  
(3mm) clearance between the notch in the flange and  
the outer diameter of the worm gear.  
ure 12  
4. Tighten the nuts.  
HOW TO ADJUST THE AUGER CONTROL CABLE  
The auger control cable is adjusted at the factory. During nor-  
mal use, the auger control cable can become stretched and  
the auger drive lever will not properly engage or disengage  
the auger.  
1. Remove the “Z” hook from the auger drive lever  
(Figure 13).  
2. Slide the cable boot off the cable adjustment bracket  
Auger Drive  
(Figure 14).  
Lever  
3. Push the bottom of the auger control cable through the  
cable adjustment bracket until the “Z” hook can be re-  
moved.  
Z-Hook  
4. Remove the “Z” hook from the cable adjustment brack-  
et. Move the “Z” hook down to the next adjustment hole.  
Figure 13  
5. Pull the auger control cable up through the cable ad-  
justment bracket.  
6. Put the cable boot over the cable adjustment bracket.  
7. Install the “Z” hook to the auger drive lever.  
8. To check the adjustment, start the snow thrower. Make  
sure the auger does not rotate when the auger drive lever  
is released.  
Auger Control Cable  
Cable Boot  
Z-Hook  
Cable Adjustment  
Bracket  
Figure 14  
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MAINTENANCE  
HOW TO REPLACE THE DRIVE BELT  
Belt Guide  
Idler Pulley  
Engine PUlley  
The drive belt is of special construction and must be re-  
placed with original factory replacement belt available from  
your nearest authorized service center.  
Drive Belt  
1. Remove the belt cover. See “How To Remove The Belt  
Cover”.  
2. Remove the drive belt from the idler pulley. (See  
Figure 15 and Figure 16)  
Belt Guide  
Figure 15  
3. Remove the drive belt from the engine pulley. Be  
careful, not to bend the belt guides.  
4. Remove the drive belt from the auger pulley. (See  
Figure 16)  
Idler Pulley  
5. Remove the old drive belt.  
Engine  
Pulley  
6. To install the new drive belt, reverse the above steps.  
7. Make sure the drive belt is seated properly on the pul-  
Drive Belt  
leys.  
Auger Pulley  
Figure 16  
NOTE: When the auger control lever is engaged, the  
belt guides must be 1/16” from the drive belt . (See  
Figure 17)  
Engine Pulley  
Idler Pulley  
8. Install belt cover. See “How To Remove The Belt Cov-  
er”.  
Drive Belt  
Belt Guide  
Figure 17  
1/16 inch  
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MAINTENANCE  
HOW TO REPLACE THE AUGER  
1. Remove the belt cover. See “How To Remove The Belt  
Cover”.  
5. Remove the fasteners from the bearing assembly. Re-  
move the bearing assembly from the auger housing.  
2. Remove the drive belt. See “How To Replace The Drive  
Belt”.  
6. Slide the auger out of the bearing assembly on the  
right side of the snow thrower.  
3. Remove the auger pulley from the auger shaft  
(threads are left hand; turn clockwise to remove). (See  
Figure 18).  
7. Tip the auger enough to allow the auger to slide out of  
the auger housing.  
4. To keep the auger from rotating, set a 2”x4” piece of  
wood on the center paddle to secure auger.  
8. To install auger, reverse the above steps.  
Wood  
Auger Housing  
Center Paddle  
Auger  
Bearing Assemlby  
Auger Pulley  
Figure 18  
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MAINTENANCE  
TO ADJUST THE CARBURETOR  
The carburetor is not adjustable. Engine performance  
should not be affected at altitudes up to 7,000 feet. For  
operation at higher elevations, contact your nearest autho-  
rized service center.  
IMPORTANT: Never tamper with the engine governor,  
which is factory set for proper engine speed. Over-speed-  
ing the engine above the factory high speed setting can be  
dangerous. If the engine-governed high speed needs an  
adjustment, contact an authorized service center. They  
have the proper equipment and experience to make any  
necessary adjustments.  
TO ADJUST OR REPLACE THE SPARK PLUG  
Check the spark plug every twenty-five (25) hours. Re-  
place the spark plug if the electrodes are pitted or burned  
or if the porcelain is cracked.  
8. Install the spark plug in the cylinder head and firmly tight-  
en. Recommended torque is 18 to 20 foot pounds.  
The spark plug is housed in the engine compartment under  
the top cover and cannot be seen under normal condi-  
tions.  
1. Remove the top cover. See “How To Remove The Top  
Cover”.  
.030” (0.76 mm) Gap  
2. The spark plug and wire are now visible.  
3. Remove the spark plug wire.  
4. Clean the area around the spark plug base to prevent dirt  
from entering the engine when the spark plug is removed.  
5. Remove the spark plug.  
6. Check the spark plug. If the spark plug is cracked, fouled  
or dirty, it must be replaced .  
Figure 19  
7. Set the gap between the electrodes of the new spark plug  
at 0.030 inch (Figure 19).  
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STORAGE  
5. Insure that all nuts, bolts, and screws are securely fas-  
OFF SEASON STORAGE  
tened. Inspect all visible moving parts for damage,  
breakage, and wear. Replace if necessary.  
WARNING: Never store the engine, with fuel in  
the tank, indoors or in a poor ventilated enclo-  
sure where fuel fumes could reach an open  
flame, spark or pilot light as on a furnace, water heater,  
clothes dryer, etc.  
6. Touch up all rusted or chipped paint surfaces; sand lightly  
before painting.  
Handle gasoline carefully. It is highly flammable and  
careless use could result In serious fire damage to your  
person and /or property.  
7. Cover the bare metal parts of the blower housing and au-  
ger with rust preventative.  
Drain fuel into approved containers outdoors, away  
from open flame.  
8. If possible, store your snowthrower indoors and cover it  
to give protection from dust and dirt.  
If the snowthrower is to be stored for thirty (30) days or more  
at the end of the snow season, the following steps are  
recommended to prepare your snowthrower for storage.  
9. On models with folding handles, loosen the knobs that  
secure the upper handle. Rotate the upper handle back.  
NOTE: Gasoline must be removed or treated to prevent  
gum deposits from forming in the tank, filter, hose, and  
carburetor during storage.  
10. If the machine must be stored outdoors, block up the s-  
nowthrower and insure the entire machine is off the  
ground. Cover the snowthrower with a heavy tarpaulin.  
1. To remove gasoline, run engine until tank is empty and  
engine stops.  
REMOVING THE SNOWTHROWER FROM  
STORAGE  
When removing the snowthrower from storage, follow the  
steps below.  
If you do not want to remove the gasoline, add fuel stabilizer  
to any gasoline left in the tank to minimize gum deposits and  
acids. If the tank is almost empty, mix stabilizer with fresh  
gasoline in a separate container and add some to the tank.  
ALWAYS FOLLOW INSTRUCTIONS ON STABILIZER  
CONTAINER. THEN RUN ENGINE AT LEAST 10 MINUTES  
AFTER STABILIZER IS ADDED TO ALLOW MIXTURE TO  
REACH CARBURETOR. STORE SNOWTHROWER IN  
SAFE PLACE.  
1. Put the upper handle in the operating position, tighten the  
knobs that secure the upper handle.  
2. Fill the fuel tank with a fresh fuel-oil mixture. See “How  
to Mix The Fuel Mixture” in the Operation section.  
2. Lubricating the piston/cylinder area. This can be done by  
first removing the spark plug and squirting clean engine  
oil into the spark plug hole. Then cover the spark plug  
hole with a rag to absorb oil spray. Next, rotate the engine  
by pulling the starter two or three times. Finally, reinstall  
spark plug and attach spark plug wire.  
3. Lubricate the auger bail and idler arm.  
4. Check the spark plug. Make sure the gap is correct. If the  
spark plug is worn or damaged, replace before using.  
5. Make sure all fasteners are tight.  
3. Thoroughly clean the snowthrower.  
6. Make sure all guards, shields, and covers are in place.  
7. Make sure all adjustments are correct.  
4. Lubricate all lubrication points (see “Lubrication“ in the  
Service Recommendations section).  
21  
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TROUBLE SHOOTING CHART  
PROBLEM  
LOOK FOR  
REMEDY  
Difficult starting  
Defective spark plug.  
Replace defective spark plug.  
Clean fuel line.  
Engine runs erratically Blocked fuel line.  
Empty gas tank.  
Check fuel supply,  
Add fresh gasoline.  
Stale gasoline.  
Water or dirt in fuel system.  
Remove carburetor bowl to drain fuel tank. Refill  
with fresh fuel. CAUTION: Do not remove  
carburetor bowl when the engine is hot.  
Engine stalls  
Loss of power  
Unit running on CHOKE.  
Set choke lever to RUN position.  
Gas cap vent hole is plugged.  
Remove ice and snow from cap. Be sure vent  
hole is clear.  
Excessive vibration  
Loose parts.  
Stop engine immediately and remove spark plug  
wire. Tighten all bolts and make all necessary  
repairs. If vibration continues, have the unit  
serviced by a competent repairman.  
Unit fails to propel  
itself  
Drive belt loose or damaged.  
Replace drive belt. Refer to Drive Belt  
Replacement in the Maintenance section of this  
manual.  
Incorrect adjustment of traction drive  
cable.  
Adjust traction drive cable. Refer to Cable  
Adjustment in the Maintenance section of this  
manual.  
Unit fails to discharge  
snow  
Auger drive belt loose or damaged.  
Replace or adjust auger drive belt. Refer to Drive  
Belt Replacement and Drive Belt Adjustment in  
the Maintenance section of this manual.  
Auger control cable not adjusted  
correctly.  
Adjust auger control cable. Refer to Cable  
Adjustment in the Maintenance section of this  
manual.  
Discharge chute clogged.  
Stop engine immediately and disconnect spark  
plug wire. Refer to the first Warning in  
Snowthrower Operation in the Operation  
section of this manual. Clean discharge chute  
and inside of auger housing.  
Foreign object lodged in auger.  
Stop engine immediately and disconnect spark  
plug wire. Remove object from auger housing.  
Identifying Your Snowthrower  
Your new Snowthrower has two (2) identifying numbers: (1) unit model number: (2) unit serial number. The two preceding  
numbers are required to insure that the proper replacement parts are obtained when required. If you have any questions  
concerning parts, service, or technical data, contact your nearest John Deere/Frontier dealer.  
For complete warranty information refer to the warranty in the Owner’s Information section of this manual.  
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REPLACEMENT PARTS  
WE RECOMMEND JOHN DEERE/FRONTIER quality  
parts and lubricants available at your John Deere/Frontier  
dealer.  
PART NUMBERS MAY CHANGE. When you order re-  
placement parts, use the part numbers listed below and on  
the following pages. If a part number changes, your John  
Deere/Frontier dealer will have the latest part number.  
WHEN YOU ORDER PARTS, your John Deere/Frontier  
dealer must have your snowthrower model and serial num-  
ber and your engine model number. This is the model and  
serial number that you recorded in the “Owner’s Informa-  
tion” section of this Owner’s Manual.  
QUICK REFERENCE PART NUMBERS  
The following is a list of replacement parts that you may  
need for routine service and maintenance. If you do not  
see the replacement part you need in the following chart,  
then check the full list of replacement part illustrations fol-  
lowing this page.  
ITEM  
PART NUMBER *  
MT37x132  
Belt  
Scraper Blade  
Spark Plug  
MT334031  
Champion RCJ8Y  
* Part Numbers are subject to change without notice.  
23  
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FRONTIER MODEL ST0320  
FACTORY MODEL 620351x16NB  
ENGINE ASSEMBLY  
10  
12  
11  
12  
11  
25  
14  
46  
14  
12  
28  
12  
28  
14  
42  
14  
70  
71  
72  
40  
25  
73  
47  
75  
33  
45  
41  
Key No. Part No.  
Description  
10  
11  
12  
14  
25  
28  
33  
40  
41  
42  
45  
46  
47  
70  
71  
72  
73  
75  
--  
------  
ENGINE  
MT180077  
MT018x16  
MT71071  
MT313440  
MT710312  
MT339017  
MT1501013  
MT333594  
MT71391  
MT48924  
MT45892  
MT590  
SCREW, 5/16-18 X.75  
WASHER  
WASHER, FLAT  
GUIDE, BELT  
SCREW  
SPRING, IDLER BRAKE  
ASSY, IDLER BRAKE ARM  
BOLT  
NUT, 5/16-18  
PULLEY, IDLER  
BOLT, CARRIAGE  
NUT  
MT338849  
MT25840  
MT181595  
MT018x16  
MT37x132  
MTF-041007C  
PULLEY, ENGINE  
WASHER, BELLEVILLE  
SCREW, 5/16-24X.75  
WASHER, SPLTLK  
BELT V 3L 34.8”  
OPERATOR’S MANUAL  
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FRONTIER MODEL ST0320  
FACTORY MODEL 620351x16NB  
FRAME COMPONENTS ASSEMBLY  
Key No. Part No.  
Description  
80  
81  
MT760272E701  
FRAME SIDE SUPPORT RH  
FRAME SIDE SUPPORT LH  
ROD, SUPPORT  
MT760271E701  
MT760169  
MT71063  
90  
91  
WASHER, HVSPTLK  
NUT, 3/8-16 REGHEX  
BRACKET, GAS TANK  
SCREW, 1/4-20X.75  
NUT, 1/4-20 YZ  
92  
MT71044  
100  
101  
102  
110  
111  
112  
113  
114  
MT578093E701  
MT302628  
MT15x143  
MT55381  
TANK, FUEL  
MT313681  
MT315433  
MT327290  
MT323387  
SCREW, 1/4-14X.88 WAHHTAP  
CAP, GAS-BLACK  
TUBING 11.50 IN.  
CLAMP, FUEL LINE  
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FRONTIER MODEL ST0320  
FACTORY MODEL 620351x16NB  
TOP COVER ASSEMBLY  
176  
26  
MTF-041007C  
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FRONTIER MODEL ST0320  
FACTORY MODEL 620351x16NB  
TOP COVER ASSEMBLY  
Key No. Part No.  
Description  
120  
121  
122  
124  
126  
127  
128  
130  
131  
140  
141  
142  
143  
145  
146  
147  
150  
151  
152  
153  
154  
155  
157  
158  
159  
170  
171  
172  
173  
174  
175  
176  
MT302265  
MT313674  
MT71067  
MT15x143  
MT326212  
MT313685  
MT578109  
MT57587  
MT333643  
MT56992  
MT313683  
MT300193  
MT49643  
MT54601  
MT1259  
COVER, BOTTOM  
SCREW, 1/4-20X1.25  
WASHER, FLAT .281X.63X.065  
NUT, 1/4-20 YZ  
COVER, CARB  
SCREW, 1/4-14X.75  
NUT, 1/4-10 SPEED J TYPE  
GROMMET & WASHER, ROPE GUIDE  
KNOB, STAND TEE  
SWITCH, IGNITION  
WASHER  
NUT, 5/8-32 ACC  
2 KEYS & RING  
PRIMER, ENGINE  
HOSE, PRIMER  
MT271172  
MT57036  
MT12342  
MT312300  
MT313686  
MT71067  
MT578107  
MT313685  
MT71067  
MT578109  
MT1501690  
MT313685  
MT71067  
MT578109  
MT55379  
MT55380  
MT26x292  
KEPS NUT, 1/4-20  
COVER, BELT  
SCREW, 10-24X.50  
NUT, #10-24  
SCREW, 1/4-20X.50  
WASHER, FLAT .281X.63X.065  
NUT, 1/4-20 TINN  
SCREW, 1/4-14X.75  
WASHER, FLAT .281X.63X.065  
NUT, 1/4-20 SPEED J TYPE  
COVER, TOP  
SCREW, 1/4-14X.75  
WASHER, FLAT .281X.63X.065  
NUT, 1/4-10 SPEED J TYPE  
SEAL, FOAM  
SEAL, STRIP CHUTE & GAS SEAL  
SCREW 10-14 x 0.63  
27  
MTF-041007C  
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FRONTIER MODEL ST0320  
FACTORY MODEL 620351x16NB  
AUGER HOUSING  
486  
511  
512  
483  
488  
510  
487  
481  
482  
483  
513  
480  
482  
489  
532  
533  
481  
520-10  
530  
533  
532  
493  
531  
520-6  
534  
541  
534  
491  
520-2  
490  
492  
520-8  
520  
28  
MTF-041007C  
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FRONTIER MODEL ST0320  
FACTORY MODEL 620351x16NB  
AUGER HOUSING  
Key No. Part No.  
Description  
480  
481  
MT330312  
MT302628  
MT71067  
HOUSING, ASSY  
SCREW, 1/4-20X.75  
WASHER, FLAT .281X.63X.065  
NUT, HEX 1/4-20 YZ  
SCREW, 1/4-20X.63  
BRACKET, STOP  
482  
483  
MT15x143  
MT579052  
MT331126  
MT331211  
MT780029  
MT334031  
MT577707  
MT302628  
MT15x143  
MT577023  
MT710263  
MT71067  
486  
487  
488  
WASHER, FLAT .333X.87X.119  
NUT, 1/4-20 HEX NYLOCK  
BLADE, SCRAPER  
RIVET, OVSET  
489  
490  
491  
492  
SCREW, 1/4-20X.75  
NUT, 1/4-20 YZ  
493  
510  
BEARING, FLANGE  
SCREW, 1/4-20X1.00  
WASHER, FLAT .281X.63X.065  
NUT, 1/4-20  
511  
512  
513  
MT15x143  
MT1501926  
MT302565  
MT49838  
520  
AUGER, ASSY  
520-2  
520-6  
520-8  
520-10  
530  
BLADE, AUGER  
RIVET  
MT335992  
BLADE, CENTER  
MT1501925E701 AUGER & BLADE SUPPORT  
MT583459  
MT334287  
MT579052  
MT71067  
MT73826  
MT338965  
BEARING & PLATE ASSY  
PLATE, RETAINER  
SCREW, 1/4-20X.63  
WASHER, FLAT .281X.63X.065  
NUT, 1/4-20  
531  
532  
533  
534  
541  
PULLEY  
29  
MTF-041007C  
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FRONTIER MODEL ST0320  
FACTORY MODEL 620351x16NB  
DISCHARGE CHUTE  
Key No. Part No.  
Description  
580  
581  
582  
590  
591  
592  
600  
601  
602  
603  
604  
605  
606  
607  
608  
MT314239  
MT711752  
MT577021  
MT334234  
MT313686  
MT15x143  
MT325847  
MT308931  
MT302843  
MT71071  
MT57171  
MT71037  
MT578088  
MT71071  
MT71391  
RING, CHUTE  
SCREW, #10X.50  
GUIDE, CHUTE  
CHUTE, LOWER  
SCREW 1/4-20X.50  
NUT, 1/4-2 YZ  
CHUTE, UPPER  
WIRE, HINGE  
BOLT, CARRIAGE 5/16-18X1.25  
WASHER, FLAT .349X.69X.066  
KNOB, T  
NUT, HEX 5/16-18  
SCREW, 5/16-18X.75  
WASHER, FLAT .349X.69X.066  
NUT, HEX 5/16-18  
30  
MTF-041007C  
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FRONTIER MODEL ST0320  
FACTORY MODEL 620351x16NB  
WHEELS  
Key No. Part No.  
Description  
650  
651  
660  
661  
662  
MT1501923  
MT583409  
MT1501689  
MT583409  
MT577598  
AXLE SHAFT  
WASHER, FLAT .391X1.00X1.25  
TIRE & RIM  
WASHER, FLAT .391X1.00X.125  
RING, RET E  
31  
MTF-041007C  
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FRONTIER MODEL ST0320  
FACTORY MODEL 620351x16NB  
HANDLE ASSEMBLY  
32  
MTF-041007C  
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FRONTIER MODEL ST0320  
FACTORY MODEL 620351x16NB  
HANDLE ASSEMBLY  
Key No. Part No.  
Description  
740  
741  
742  
743  
744  
750  
751  
752  
753  
755  
756  
757  
759  
760  
761  
762  
763  
764  
765  
MT760774  
MT313441  
MT760773  
MT308146  
MT313471  
MT313487E701  
MT313674  
MT71067  
CABLE, UPPER  
BRACKET, CABLE ADJ  
CABLE, LOWER CONTROL  
BOOT, CLUTCH SPRING  
SPRING, EXTENSION  
HANDLE, LOWER  
SCREW, 1/4-20X1.25  
WASHER, FLAT  
NUT, 1/4-20  
MT73826  
MT761486E701  
MT712234  
MT39298  
BRACKET, CABLE  
BOLT  
PULLEY  
MT15x143  
MT313489E701  
MT313308E701  
MT337584  
MT311936  
MT57171  
NUT, 1/4-20 YZ  
UPPER HANDLE  
BAIL, CONTROL  
BOLT  
WASHER, FORM  
KNOB, T 3.00 WD  
NUT, 5/16-18  
MT71037  
33  
MTF-041007C  
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FRONTIER MODEL ST0320  
FACTORY MODEL 620351x16NB  
CHUTE ROD ASSEMBLY  
Key No. Part No.  
Description  
850  
851  
852  
853  
855  
856  
857  
860  
861  
863  
864  
870  
871  
872  
873  
874  
MT314996  
MT71072  
MT71082  
MT313431  
MT71072  
MT57082  
MT331532  
MT313712  
MT148  
ROD, ASSY UPPER CHUTE CONTROL  
WASHER, FLAT .406X.81X.066  
PIN, COTTER  
WASHER, CURVED SPRING  
WASHER, FLAT .406X.81X.066  
KNOB, SLEEVE  
NUT, PUSH  
BOLT, EYE 3/8-16X2.00  
GROMMET, EYE BOLT  
WASHER  
MT71062  
MT71045  
MT333946E701  
MT340720  
MT71071  
MT71060  
MT71037  
NUT, HEX JAM 3/8-16  
BRACKET, CHUTE ROTATE  
BOLT, CARRIAGE 5/16-18X.75  
WASHER, FLAT .349X.69X.066  
WASHER .328X.60X.09  
NUT, HEX 5/16-18  
34  
MTF-041007C  
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FRONTIER MODEL ST0320  
FACTORY MODEL 620351x16NB  
DECALS  
3
1
8
2
6
7
5
9
4
Key No. Part No.  
Description  
1
2
3
4
5
6
7
8
9
*
MT48x5258  
MT48x5642  
MT337524  
MT48x2036  
MT48x5639  
MT69880  
DECAL, THROWN OBJECTS  
DECAL, DANGER STOP ENGINE  
DECAL, STOP LEVER  
DECAL, ROTATING AUGER  
DECAL, TECUMSEH PRODUCTS CO.  
DECAL, HOT MUFFLER  
MT318494  
MT48x5259  
MT48x5257  
MTF-041007C  
DECAL, CHOKE ON/OFF  
DECAL, MANUAL STARTER INSTRUCTIONS  
DECAL, FRONTIER ST0320  
OPERATOR’S MANUAL  
* Not Illustrated  
35  
MTF-041007C  
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SPECIFICATIONS ST0320  
Engine  
Tecumseh Snow King 2-Cycle  
Horsepower  
3.5 hp  
Recoil  
Starter  
Fuel Capacity  
Drive System  
Tire Diameter  
Clearing Width  
Housing Height  
Auger Diameter  
Auger Type  
1.0 quart  
Auger  
7”  
20”  
10.25”  
9”  
Rubber-edged  
Remote  
190_  
Chute Rotation  
Chute Turning Radius  
Deflector Control  
Weight  
Manual  
55 lbs  
Warranty - Engine  
Warranty - Machine  
2 years  
3 years  
36  
MTF-041007C  
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