RedMax Saw SGCZ2450S User Guide

SGCZ2450S  
848-JN7-93A0 (909)  
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OWNER'S/OPERATOR'S  
MANUAL  
RECIPROCATORS  
SGCZ2450S  
WARNING  
The engine exhaust from this  
product contains chemicals  
known to the State of California to  
cause cancer, birth defects or  
other reproductive harm.  
WARNING  
Before using our products,  
please read this manual carefully  
to understand the proper use of  
your unit.  
APPLICABLE SERIAL NUMBERS :  
DRIVE UNIT 90800101 and up  
ENGINE UNIT 90800101 and up  
US-1  
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SGCZ2450S  
1. Parts location  
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1. Loop handle  
2. Sholder strap hanger  
3. Stop switch  
4. Throttle cable  
5. Throttle lever  
6. Drive shaft housing  
7. Debris guard  
8. Blade  
9. Cutter case  
10. Spark arrester  
11. Starter knob  
12. Fuel tank  
13. Primer pump  
14. Choke lever  
15. Air cleaner cover  
2. Specifications  
SGCZ2450S  
Overall size ( L x W x H )····································································76.2 (1935) x 9.1 (230) x 10.0 (255) in. (mm)  
Dry Weight·····································································································································15.7 (7.1) lbs (kg)  
Engine  
Type······························································································Air cooled 2-stroke gasoline engine  
Model···································································································································· GZ23N17  
3
Displacement·······································································································1.5 (23.6) cu-in (cm )  
-1  
Max. output ···················································································1.1 Hp (0.8 kW) at 8000/min (rpm)  
-1  
Idle speed·············································································································3000 200/min (rpm)  
Fuel ··········································································································Mixture (Gasoline 50 : Oil 1)  
(when using RedMax genuine oil)  
Carburetor ·······································································································Walbro Diaphragm type  
Spark Plug·······················································································································NGK CMR7H  
Durability period ·······················································································································300 hrs.  
Standard operation speed ···························································································8000~9500 rpm  
Fuel tank capacity ·························································································································21.3 fl.oz (0.63  
)
Transmission·······································································································Centrifugal clutch, Rigid driveshaft  
Reduction ratio ···················································································································································7.87  
Standard Accessories  
Tool Kit ···········································································································································1 pc  
Specifications are subject to change without notice.  
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3. Warning labels on the machine  
( )  
1
( )  
2
( )  
3
( )  
4
( )  
5
( )  
6
15m (50ft)  
(1) Read owner/operator manual before operating this machine.  
(2) Wear head, eye and ear protection.  
(3) Warning! Danger of kickback.  
(4) Beware of thrown objects.  
(5) Warning/Attention  
(6) Keep all children, bystanders and helpers 15 meters away from the machine  
IMPORTANT  
If warning label peel off or become soiled and impossible to read, you should contact the dealer from  
which you purchased the product to order new labels and affix them in the required location(s).  
WARNING  
Never modify your machine.  
We won't warrant the machine, if you use the remodeled machine or you don't observe the proper  
usage written in the manual.  
4. Symbols on the machine  
For safe operation and maintenance, symbols  
are carved in relief on the machine. According  
to these indications, please be careful not to  
take a mistake.  
EMISSION CONTROL  
An emission control label is located on the engine.  
EMISSION CONTROL INFORMATION  
THIS ENGINE MEETS U.S. EPA AND CALI-  
1
FORNIA EXH / EVP REGS FOR 2009* S.O.R.E.  
(a) The port to refuel the "MIX GASOLINE"  
Position: FUEL TANK CAP  
2
ENGINE FAMILY : 9HQZS.0244XY* DISPL.: 24cc  
3
EMISSION CONTROL SYSTEM : EXH;EM/EVP;SP*  
COMPLIANCE PERIOD : 300 HOURS  
REFER TO OPERATOR'S MANUAL FOR MAINTE-  
NANCE, SPECIFICATIONS AND ADJUSTMENTS.  
MANUFACTURED:  
(b) The direction to close the choke  
Position: AIR CLEANER COVER  
USE JASO FD OR ISO L-EGD GRADE 50:1 OIL  
(c) The direction to open the choke  
Position: AIR CLEANER COVER  
*1: The year will be changed every year of manufacturing.  
*2: The initial number will be changed every year of  
manufacturing.  
*3: SP : Sealed tank made of HDPE or PE.  
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5. For safe operation  
WARNING  
b: Approved ear protection to reduce the  
risk of hearing loss.  
c: Approved (ANSI Z87.1.) eye protection  
and foot protection to reduce the risk of  
injury associated with thrown objects.  
d: Face filter mask in dusty conditions to  
reduce the risk of injury associated with  
the inhalation of dust.  
e: Wear sturdy rubber-soled shoes or  
shoes with some other form of anti-slip  
protection to help protect you against  
falling.  
f: Wear thick anti-vibration gloves to  
reduce the risk of whitefinger disease.  
g: Do not wear loose clothing, scarves,  
neck chains, unconfineed long hair, and  
like to reduce the risk of injury  
• A brushcutter or trimmer can be  
dangerous if used incorrectly or  
carelessly, and can cause serious or  
fatal injury to the operater or others. It  
is extremely important that you read  
and understand the contents of this  
Owner's manual.  
• Under no circumstances may the  
design of the machine be modified  
without the permission of the  
manufacturer. Always use genuine  
accessories and parts. Non-authorized  
modifications and/or accessories or  
parts can result in serious personal  
injury or the death of the operator or  
others.  
• When planning your work schedule,  
allow plenty of time to rest. Limit the  
amount of time over which the product  
is to be used continuously to  
somewhere around 30 ~ 40 minutes per  
session. Also try to keep the total  
amount of work performed in a single  
day under 2 hours or less.  
• If you don’t observe the working time,  
or working manner (See p5), Repetitive  
Stress Injury(RSI) could occur.  
If you feel discomfort, redness and  
swelling of your fingers or any other  
part of your body, see a doctor before  
getting worse.  
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associated with objects being drawn into  
air intake and rotating parts.  
Personal protective equipment cannot  
eliminate the risk of injury but it will reduce  
the degree of injury.  
4. The ignition system of your unit produces  
an electromagnetic field of a very low  
intensity. This field may interfere with some  
pacemakers. To reduce the risk of serious  
or fatal injury, persons with pacemaker  
should consult their physician and the  
pacemaker munufacturer before operating  
this tool.  
5. The area within a perimeter of 50 feet (15  
meters) of the person using the product  
should be considered a hazardous area  
into which no one should enter. If  
necessary yellow warning rope, warning  
signs should be placed around the  
perimeter of the area.  
Basic safety rules  
1. Never operate the product when you are  
fatigued, ill, or upset, or under the  
influence of madication that may make you  
drowsy, or if you are under the influence  
of alcohol or drugs.  
When work is to be performed  
simultaneously by two or more persons,  
care should also be taken to constantly  
look around or otherwise check for the  
presence and locations of other people  
working so as to maintain a distance  
between each person sufficient to ensure  
safety.  
6. Avoid using the product where stable  
footing and balance are not assured.  
7. All product service, other than the items  
listed in the Owner's Manual, should be  
performed by competent service  
personnel.  
8. Always shut off the engine before setting it  
down.  
9. Start the engine only in well ventilated  
areas. Never start or run the engine inside  
a closed room or building and potentially  
explosive atmosphere. Exhaust fumes  
2. Never use the product;  
a: When the ground is slippery or when  
you can't maintain a steady posture.  
b: At night, at times of heavy fog, or at any  
other times when your field of vision  
might be limited and it would be difficult  
to gain a clear view of the working area.  
c: During rain storms, during lightning  
storms, at times of strong or gale-force  
winds, or at any other times when  
weather conditions might make it  
unsafe to use the product.  
3. Wear the following protective equipments  
when operating the product.  
a: Approved helmet to reduce the risk of  
falling objects.  
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5. For safe operation  
contain dangerous carbon monoxide.  
starts.  
10. Never to touch the spark plug or plug cord  
while the engine is in operation Doing so  
may result in being subjected to an  
electrical shock.  
11.Never to touch the muffler, spark plug,  
other metallic parts of the engine or  
engine cover while the engine is in  
operation or immediately after shutting  
down the engine. These metallic parts  
and engine cover reach high  
WARNING  
Make sure the throttle is at idle position.  
Never place the throttle into the high  
speed position or half throttle position  
(throttle lock position) when starting the  
engine.  
3. After starting the engine, check to make  
sure that the cutting attachment stops  
rotating when the throttle is moved fully  
back to its original position (idle position). If  
it continues to rotate even after the throttle  
has been moved fully back, turn off the  
engine and take the unit to your authorized  
RedMax servicing dealer for repair.  
temperatures during operation and doing  
so could result in serious burns.  
12.To reduce the risk of injury associated  
with contacting rotating parts, stop the  
engine before installing or removing  
attachments. Always disconnect the spark  
plug before performing maintenance or  
accessing movable parts.  
Using the product  
Before use  
1. Each time before starting the engine,  
inspect the entire unit to see if every part  
is in good order and is securely tightened  
in place. If any damage is found in the fuel  
line, the exhaust line, or the ignition wiring,  
do not use the product until it has been  
repaired.  
IMPORTANT  
Cut only materials recommended by the  
manufacturer. And use only for tasks  
explained in the manual.  
1. Grip the handles firmly with both hands  
using your whole hand. Place your feet  
slightly apart (slightly further apart than the  
width of your shoulders) so that your  
weight is distributed evenly across both  
legs, and always be sure to maintain a  
steady , even posture while working.  
2. Keep cutting attachment below waist level.  
3. Maintain the speed of the engine at the  
level required to perform cutting work, and  
never raise the speed of the engine above  
the level necessary.  
4. If you detect abnormal vibration or noise  
during operation, promptly stop the product  
and check whether something has broken.  
If a breakedown has occurred, do not  
operate the product until the problem is  
fixed.  
WARNING  
2. Before starting operation, always make  
sure that the cutting attachment and the  
debris guard are properly installed and  
securely fastened.  
3. Check the condition of working area to  
avoid any accident by hitting hidden  
obstacles such as stumps, stones, cans, or  
broken grass.  
IMPORTANT  
Remove any obstacle before beginning work.  
Starting the engine  
5. Keep all parts of your body away from  
rotating cutting attachment.  
1. Keep bystanders and animals at least 50  
feet (15 meters) away from the operating  
point. If you are approached, immediately  
stop the engine.  
2. The product is equipped with centrifugal  
clutch mechanism, so the cutting  
6. Guard against hazardous situations at all  
times. Warn adults to keep pets and  
children away from the area. Be careful if  
you are approached. Injury may result from  
flying debris.  
attachment could rotate as soon as the  
engine is started. When starting the  
engine, place the product onto the ground  
in a flat clear area and hold it firmly in  
place so as to ensure that neither the  
cutting part nor the throttle come into  
contact with any obstacle when the engine  
7. If someone calls out or otherwise interrupts  
you while working, always be sure to turn  
off the engine before turning around.  
8. After using the product and other  
equipment, CLEAN UP!  
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5. For safe operation  
Transport  
1. Drain the fuel from the fuel tank before  
3. Operate the product at the lowest possible  
throttle speed to do the job.  
transporting or storing the product.  
2. When hand-carrying the product, cover  
over the cutting part, lift up the product and  
carry it paying attention to the blade.  
3. Secure the unit carefully to prevent  
movement when it is transported.  
4. Check your equipment before operation,  
especially the muffler, air intakes and air  
filters.  
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For protecting your body from vibration  
4. A unit that receives a strong shock during  
transport and unloading may malfunction.  
WARNING  
Prolonged use of the product, exposing  
the operater to vibrations and cold may  
produce whitefinger disease (Raynaud's  
phenomenon), which symptoms are  
tingling and burning sensations followed  
by loss of color and numbness in the  
fingers.  
All factors which contribute to whitefinger  
disease are not known, but cold weather,  
smoking diseases or physical conditions  
as well as long periods of exposure to  
vibration are mentioned as factors. In  
order to reduce the risk of whitefinger  
disease, the following precautions are  
strongly recommended.  
Fuel safety  
1. Always use caution when handling fuel. It  
is highly flammable. Wipe up all spills,  
screw the fuel cap back tightly, and then  
move the product at least 10 feet (3  
meters) from the fueling point before  
starting the engine.  
2. Eliminate all sources of sparks or flame  
(i.e. smoking, open flames, or work that  
can cause sparks) in the areas where fuel  
is mixed, poured, or stored.  
3. Do not smoke while handling fuel or while  
operating the product.  
4. Do not refuel a hot engine.  
5. Do not refuel a running engine.  
6. Keep the handles dry, clean and free of oil  
or fuel mixture.  
a: Keep your body warm. Never use the  
product during rains.  
7. Always store fuel in an approved container  
designed for that purpose.  
b: Wear thick anti-vibration gloves.  
c: Take more than 5 minutes of break in  
warm place frequently.  
Storage  
d: Maintain a firm grip at all times, but do not  
squeeze the handles with constant,  
excessive pressures.  
e: If you feel discomfort, redness and swelling  
of your fingers or any other part of your  
body, see a doctor before getting worse.  
1. Always store the product and fuel so that  
there is no risk of leakages or fumes  
coming into contact with sparks or naked  
flames from electrical equipment, electric  
moters, relays/switches, boilers and the  
like.  
2. When storing the product, the fuel tank  
should be emptied.  
3. When storing the product, choose a space  
indoors free from moisture and out of the  
reach of children.  
Maintenance  
1. In order to maintain your product in proper  
working order, perform the maintenance  
and checking operations described in the  
manual at regular intervals.  
2. Always be sure to turn off the engine and  
disconnect the spark plug before  
performing any maintenance or checking  
procedures.  
Avoid noise problem  
IMPORTANT  
Check and follow the local regulations as to  
sound level and hours of operations for the  
product.  
WARNING  
The metallic parts and engine cover reach  
high temperatures immediately after  
stopping the engine.  
1. Operate power equipment only at  
reasonable hours not early in the morning  
or late at night when people might be  
disturbed. Comply with times listed in local  
ordinances.  
3. Examine the product at intervals for loose  
fasteners and rusted or damaged parts.  
Use special care around the fuel line, the  
muffler, and the ignition wiring.  
2. To reduce sound levels, limit the number of  
pieces of equipment used at any one time.  
4. When replacing the any other part, or any  
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SGCZ2450S  
5. For safe operation  
lubricant, always be sure to use only  
RedMax products or products which  
have been certified by RedMax for use  
with the RedMax product.  
5. In the event that any part must be  
replaced or any maintenance or repair  
work not described in this manual must  
be performed, please contact a  
representative from the store nearest  
RedMax authorized servicing dealer for  
assistance.  
6. Do not use any accessory or  
attachment other than those bearing  
the RedMax mark and recommended  
for the unit.  
7. Under no circumstances should you  
ever take apart the product or alter it in  
any way. Doing so might result in the  
product becoming damaged during  
operation or the product becoming  
unable to operate properly.  
Disposal  
When disposing your machine, fuel or oil  
for the machine, be sure to allow your  
local regulations.  
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6. Set up  
MOUNTING ENGINE (SE1)  
CUTTERCASE (SE4)  
1. Install the engine to the driveshaft so  
that the cylinder head and the stop  
switch may come on the same side.  
2. Using attached four bolts, secure the  
connection firmly with equal force  
(Torque: 25in-lbs)(Torque: 2.8 N.m.).  
WARNING  
SE1  
The blade has very sharp edges. Be  
sure to use protective gloves  
whenever handling it.  
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(1) Bolt  
(2) Stop switch  
1. Remove the fastening screw(long) and  
the lock screw(short) from the  
cuttercase.  
2. While aligning the locking holes, install  
the cuttercase assembly to the shaft  
casing.  
3. Align the locking holes and screw in the  
lock screw to the bottom by hand, then  
secure it with the wrench provided. Do  
not tighten up the lock screw with the  
holes out of alignment, or the  
cuttercase can be damaged.  
SE4  
WARNING  
Never use any screws other than those  
specified by the manufacturer, or the  
engine can get loose, resulting in a  
hazardous event.  
IMPORTANT  
Tighten the screws gradually by turns.  
(1) Cuttercase  
(2) Locking holes  
CONNECTING THROTTLE WIRE  
1. Remove the air cleaner cover.  
2. Connect the end of the throttle wire to  
the joint on the top of the carburetor.  
(SE2)  
SE2  
NOTE  
If the locking screw is tightened up with  
the holes out of alignment, the cuttercase  
may be damaged.  
4. Fasten the cuttercase fastening screw.  
CONNECTING SWITCH WIRES  
• Connect the switch wires between the  
engine and the main unit. Pair the wires  
of the same color.  
BLADE GUARD  
SE5  
Install the blade guard onto the shaft  
casing approx. 3cm away from the  
cuttercase. Fasten the clamp uniformly.  
(SE5, SE6)  
SE3  
INSTALLING HANDLE  
• Mount the handle to the shaft tube and  
clamp it at a location that is comfortable  
to you. (SE3)  
(1) About 48cm  
SE6  
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7. Fuel  
FUEL  
lines or fuel tank of the engine.  
WARNING  
NOTE  
• Gasoline is very flammable. Avoid smoking or bringing any  
flame or sparks near fuel. Make sure to stop the engine and  
allow it cool before refueling the unit. Select outdoor bare  
ground for fueling and move at least 10 ft (3 m) away from  
the fueling point before starting the engine.  
• Failures caused by operating engines on gasoline with octane  
rating lower than 89 are not covered by the RedMax Two-  
Stroke engine warranty.  
WARNING  
• Alternative Fuels (Not Gasoline)  
Alternative fuels, such as E-15 (15% ethanol), E-20 (20%  
ethanol), E-85 (85% ethanol) are NOT classified as gasoline  
and are NOT approved for use in RedMax 2-stroke gasoline  
engines. Use of alternative fuels will cause major engine  
performance and durability problems such as: improper  
clutch engagements, overheating, vapor lock, power loss,  
lubrication deficiency, deterioration of fuel lines, gaskets  
and internal carburetor components, etc... Alternative fuels  
cause high moisture absorption into the fuel/oil mixture  
leading to oil and fuel separation.  
GASOLINE REQUIREMENTS  
• All 2-Stroke RedMax Products are powered by RedMax  
Professional-Commercial Duty, Hi-Performance, Hi-RPM, Air  
Cooled 2-Stroke engines.  
RedMax – Hi-Performance 2-stroke engines produce higher HP  
outputs as compared to standard Home Owner Duty or Light  
Commercial Duty production engines offered by most  
manufacturers.  
• Exhaust emission are controlled by the fundamental engine  
parameters and components (eq., carburation, ignition timing  
and port timing) without addition of any major hardware or the  
introduction of an inert material during combustion.  
• The RedMax Engines are registered and certified with CARB  
(California Air Resources Board) and EPA (Environmental  
Protection Agency) to operate on CLEAN Mid-grade 89 octane  
or Premium, unleaded (lead-free) gasoline and RedMax Air-  
Cooled "Max Life", Synthetic blend Premium two-stroke engine  
oil mixed at 50:1 ratio.  
OIL REQUIREMENTS  
• Use only RedMax "Max Life", Synthetic blend Premium Air-  
Cooled two-stroke engine oil or oil certified to ISO-L-EGD  
(ISO/CD1378) standard AND one that is JASO-FD registered.  
RedMax Air-Cooled "Max Life", Synthetic blend Premium two  
stroke engine oil and ISO-L-EGD (ISO/CD1378) AND JASO-FD  
oils are fully compatible with gasoline's containing 10% Ethanol.  
RedMax Air-Cooled "Max Life", Synthetic blend Premium two  
stroke engine oil and ISO-L-EGD (ISO/CD1378) AND JASO-FD  
oils are Universal and should be mixed at 50:1 ratio for all 2  
stroke air cooled engines sold in the past regardless of mixing  
ratios specified in those manuals.  
• Unleaded gasoline is recommended to reduce the  
contamination of the air for the sake of your health and the  
environment.  
• If the oil is registered with JASO, the JASO Logo with FD and  
registration number will be displayed on the container. The  
highest JASO rating is "FD", which equals the ISO-L-EGD  
rating. Lower ratings are "FC", "FB", and "FA".  
• This Hi-Performance Air Cooled 2-stroke Engine requires the  
[ R+M ]  
use of Minimum 89 Octane  
(Mid grade or Premium)  
2
clean gasoline. Gasoline may contain maximum of 10% Ethanol  
(grain alcohol) or up to 15% MTBE (Methyl tertiary-butyl ether).  
Gasoline containing Methanol (Wood Alcohol) is NOT  
approved.  
NOTE  
• Engine problems due to inadequate lubrication caused by  
failure to use ISO-L-EGD certified and JASO FD registered oil  
such as "MaxLife", RedMax Synthetic blend Premium 2-stroke  
oil WILL VOID THE REDMAX TWO-STROKE ENGINE  
WARRANTY.  
• IF octane rating of the Mid Grade gasoline in your area is lower  
than 89 Octane use Premium Unleaded Gasoline. The majority  
of all 2-stroke engine manufacturers in the USA and Canada  
recommend using gasoline with 89 Octane or higher.  
WARNING  
WARNING  
• Gasoline with an octane rating lower than 89 will greatly  
increase the engines operating temperature. Low octane  
gasoline will cause detonation (knock) resulting in piston  
seizures and major internal engine components damage.  
• Poor quality gasolines or oils may damage sealing rings, fuel  
• Do not use NMMA (National Marine Manufacturers  
Association), BIA (Boating Industry Association), and TCW (two  
cycle water cooled) oils designed for MoPeds or Outboard,  
water cooled Marine Engines. Do not use API (American  
Petroleum Institute), TC (Two Cycle) labeled oils. The API-TC  
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7. Fuel  
test standard has been discontinued by API in 1995 and it no  
longer exists.  
WARNING  
1. Select flat and bare ground for fueling.  
2. Move at least 10 feet (3 meters) away from the fueling point  
before starting the engine.  
3. Stop the engine before refueling the unit. At that time, be  
sure to sufficiently agitate the mixed gasoline in the  
container.  
IMPORTANT  
U
S
• Gasoline/Oil mixture Storage Recommendations  
Store your gasoline or gasoline/oil mixture in a cool dry area in  
a tightly sealed approved container to limit the entry of moisture  
and additional air (oxygen). Moisture and air cause the  
development of varnish and gum, making the fuel stale. Stored  
gasoline and gasoline/oil mixture ages and loses its octane  
rating and volatility. Do not mix more gasoline/oil than you  
intend to use in 30 days, and 60 days when fuel stabilizer is  
added. RedMax Air-Cooled "Max Life" Synthetic blend  
Premium two-stroke engine oil "Contains fuel stabilizer" and  
will automatically extend your gasoline/oil mixture life up to 60  
days.  
FOR YOUR ENGINE LIFE, AVOID  
1. FUEL WITH NO OIL (RAW GASOLINE) – It will cause severe  
damage to the internal engine parts very quickly.  
2. GASOHOL – It can cause deterioration of rubber and/or plastic  
parts and disruption of engine lubrication.  
3. OIL FOR 4-CYCLE ENGINE USE – It can cause spark plug  
fouling, exhaust port blocking, or piston ring seizure.  
4. Mixed fuels which have been left unused for a period of  
one month or more may clog the carburetor and result in the  
engine failing to operate properly.  
5. In the case of storing the product for a long period of time,  
clean the fuel tank after rendering it empty. Next, Start the  
engine and run the carburetor dry residual fuel.  
6. In the case of scrapping the used mixed oil container, scrap it  
only at an authorized depository site.  
HOW TO MIX FUEL  
RECOMMENDED MIXING RATIO  
GASOLINE 50 : OIL 1  
(when using RedMax Air-Cooled "Max  
Life")  
50:1 MIXING CHART  
NOTE  
GASOLINE  
gal.  
1
2
3
4
5
• As for details of quality assurance, read the description in the  
section Limited Warranty carefully. Moreover, normal wear and  
change in product with no functional influence are not covered  
by the warranty. Also, be careful that, if the usage in the  
instruction manual is not observed as to the mixed gasoline,  
type of oil or fuel to be used. described therein, it may not be  
covered by the warranty.  
2-CYCLE OIL fl.oz  
2.6  
5.2  
7.8 10.4 13  
GASOLINE  
liter  
ml  
1
2
3
4
5
2-CYCLE OIL  
20  
40  
60  
80  
100  
WARNING  
• Pay attention to agitation.  
1. Measure out the quantities of gasoline and oil to be mixed.  
2. Put some of the gasoline into a clean, approved fuel container.  
3. Pour in all of the oil and agitate well for 10seconds.  
4. Pour in the rest of gasoline and agitate again for at least one  
minute. As some oils may be difficult to agitate depending on oil  
ingredients, sufficient agitation is necessary. Be careful that, if  
the agitation is insufficient, there is an increased danger of early  
piston seizure due to abnormally lean mixture.  
5. Place a clear indication on the outside of the container to avoid  
mixing up with gasoline or other containers that dont contain oil.  
6. Indicate the contents on outside of container for easy  
identification.  
FUELING THE UNIT  
1. Untwist and remove the fuel cap. Rest the cap on a clean  
surface.  
2. Put fuel into the fuel tank to 80% of the full capacity.  
3. Fasten the fuel cap securely and wipe up any fuel spillage  
around the unit.  
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SGCZ2450S  
8. Operation  
STARTING ENGINE  
NOTE  
WARNING  
1. When restarting the engine  
immediately after stopping it, leave the  
choke open.  
2. Overchoking can make the engine hard  
to start due to excess fuel. When the  
engine failed to start after several  
attempts, open the choke and repeat  
pulling the rope, or remove the spark  
plug and dry it.  
The cutting head will start rotating  
upon the engine starts.  
1. Rest the unit on a flat, firm place. Keep  
the cutting head off the ground and  
clear of surrounding objects as it will  
start rotating upon starting of the  
engine.  
OP1  
STOPPING ENGINE (OP3)  
1. Release the throttle lever and run the  
engine for a half minute.  
2. Shift the stop switch to the "STOP"  
position.  
2. Push the primer pump several times  
until overflown fuel flows out in the  
clear tube. (OP1)  
IMPORTANT  
3. Move the choke lever to the closed  
position. (OP2)  
OP2  
• Except for an emergency, avoid  
stopping the engine while pulling the  
throttle lever.  
(1)  
(1) choke lever  
(2) close  
(3) open  
(2)  
(3)  
ADJUSTING THROTTLE CABLE  
• The normal play is 1 or 2mm when  
measured at the carburetor side end.  
Readjust with the cable adjuster as  
required. (OP5)  
OP5  
4. Set the stop switch to the "RUN"  
position. Place the unit on a flat, firm  
place. Keep the cutting head clear of  
everything around it. (OP3)  
.04 in  
(1~2mm)  
OP3  
(1)  
(1) cable adjuster  
(3)  
(2)  
(1) stop switch  
(2) RUN  
(3) STOP  
ADJUSTING IDLING SPEED (OP6)  
1. When the engine tends stop frequently  
at idling mode, turn the adjusting screw  
clockwise.  
2. When the cutting head keeps rotating  
after releasing the trigger, turn the  
adjusting screw counter-clockwise.  
(a)  
(1)  
OP6  
(a) lockout lever  
(b) throttle trigger  
(b)  
(1)  
5. Firmly grasp (a) and (b) with left hand,  
pull the starter knob quickly until engine  
fires. (OP4)  
(1) idle adjusting screw  
OP4  
NOTE  
• Warm up the engine before adjusting  
the idling speed.  
IMPORTANT  
• Avoid pulling the rope to its end or  
returning it by releasing the knob. Such  
actions can cause starter failures.  
6. Move the choke lever downward to  
open the choke. And restart engine.  
(OP2)  
7. Allow the engine to warm up for several  
minutes before starting operation.  
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SGCZ2450S  
8. Operation  
HOW TO USE  
• Adjust the front handle to the most  
comfortable position.  
CUTTING WORK  
OP8  
OP9  
OP10  
This machine does cutting not by a rotary  
cutter like conventional trimmers but by a  
pair of special blades that moves round  
within a limited angle at a speed of  
approximately 1/30 of conventional  
trimmers. This unique mechanism has  
brought you many benefits as following;  
• Start the engine and pull the throttle  
lever gradually. The blades will start  
moving as the engine speed goes up.  
• To stop the blade motion, simply  
release the throttle lever. The clutch will  
disengage and the blades stop moving  
while the engine keeps idling.  
• Move the cutting head as sliding its  
bottom on the ground. This will help  
you do the job with less effort.  
U
S
1. Since the blade does not cause grass  
chips and pebbles to be thrown around,  
you may use less care about your  
clothing or surrundings.  
2. Should the blade hit a rogid object like  
stones, trees or steel poles during  
operation, it does not produce a  
bounce motion that can cause loss of  
machine control.  
3. Since the blade does not cause cut  
grass to wrap around the neck, you  
need not to stop operation to remove  
such wrappers.  
4. What's more, since the whole circle of  
the blade is available for cutting, you  
can move the cutting head in all  
directions and cut grass growing on  
such place difficult-to-get by  
NOTE  
a) Avoid running the engine at full throttle  
with no load. Continuous no load full  
throttle operation can cause damage to  
the engine and the driveshaft.  
b) Operation at too slow engine speed  
can cause abnormal vibration of the  
machine, resulting in short life of  
driveshaft and clutch parts. If you felt  
such vibration, use a higher speed  
range.  
OP7  
OP11  
OP12  
OP13  
c) Though the blades are made of steel  
harder than conventional metal blades,  
continuous cutting in soil will accelerate  
wear.  
conventional trimmers. You can even  
trim the waterside without splashing  
water.  
WARNING  
For your health and to prevent the risk  
from vibration, refrain from working for  
a long time at the cold temperature.  
RECOMMENDED APPLICATIONS:  
• Parking area (OP8)  
• Roadside (OP9)  
• Road edge (OP10)  
• Near fences (OP11)  
• Around stones (OP12)  
• Among trees (OP13)  
• Waterside (OP14)  
OP14  
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SGCZ2450S  
9. Maintenance  
Maintenance, replacement, or repair of the emission control device and  
systems may be performed by any non-road engine repair establishment or  
individual.  
MAINTENANCE CHART  
every every every  
25  
before hours hours hours note  
50  
100  
system/compornent  
procedure  
use  
after  
after  
after  
fuel leaks, fuel spillage  
wipe out  
fuel tank, air filter, fuel filter  
inspect/clean  
replace, if necessary  
see ADJUSTING  
IDLING SPEED (p.12)  
replace carburetor  
if necessary  
idle adjusting screw  
clean and readjust  
plug gap  
GAP: .025in(0.6~0.7mm)  
replace, if necessary  
spark plug  
cylinder fins, intake air cooling vent  
clean  
muffler, spark arrester, cylinder exhaust port clean  
throttle lever, ignition switch  
check operation  
replace if  
something's wrong  
cutting parts  
debris guard  
gear case  
make sure to attach  
grease  
screws/nuts/bolts  
tighten/replace  
not adjusting screws  
To remove blades:  
WARNING  
1. Turn over the machine and remove the  
bottom cover (MA3-1) by removing the  
4 screws.  
2. Loosen 4 screws and remove the lower  
blade (MA3- 2)  
MA3  
• Before cleaning, inspecting, or  
repairing the unit, make sure that the  
engine has stopped and is cool.  
• Use protective gloves whenever  
inspecting, removing, sharpening,  
and installing the blades.  
3. Loosen 4 screws and remove the upper  
blade (MA3-3),  
BLADE  
Wipe off dust and dirt attached to the  
blades, and oil them after every use.  
MA1  
To install blades:  
The upper and lower blades are  
interchangeable. When fastening the  
blade mounting screws, torque them  
uniformly.  
To Sharpen blade:  
1. When the cutting edges have become  
dull, sharpen them by using a small disk  
grinder. (MA1-a)  
2. When sharpening, offset the teeth of  
upper and lower blades by 3mm. (MA1-  
b) To offset, insert the hexagon wrench  
into the socket on the top of the  
cuttercase and rotate it. (MA2)  
• Replace with new blades when the  
tooth width became less than 8mm at  
the tip. (MA1-c)  
MA2  
• As the extent of wear differs by each  
tooth depending on use conditions,  
rotate the blade position at intervals.  
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SGCZ2450S  
9. Maintenance  
AIR FILTER  
MUFFLER  
MA4  
• The air filter, if clogged, will reduce the  
engine performance. Check and clean  
the filter element. If the element is  
broken or clogged, replace with a new  
one. (MA4)  
WARNING  
• Inspect periodically, the muffler for  
loose fasteners, any damage or  
corrosion. If any sign of exhaust  
leakage is found, stop using the  
machine and have it repaired  
immediately.  
U
S
(1)  
(1) air filter  
FUEL FILTER  
MA5  
• When the engine runs short of fuel  
supply, check the fuel cap and the fuel  
filter for blockage. (MA5)  
• Note that failing to do so may result  
in the engine catching on fire.  
SPARK ARRESTER  
(1) fuel filter  
• The muffler is equipped with a spark  
arrester to prevent red hot carbon from  
flying out of the exhaust outlet.  
Periodically inspect and clean as  
necessary with a wire brush.  
MA7  
(1)  
In the State of California it is required  
by law (Section 4442 of the California  
Public Resources Code) to equip a  
spark arrester when a gas powered tool  
is used in any forest covered, brush  
covered, or grass covered unimproved  
land. (MA7)  
SPARK PLUG  
• Starting failure and mis-firing are often  
caused by a fouled spark plug. Clean  
the spark plug and check that the plug  
gap is in the correct range. For a  
replacement plug, use the correct type  
specified by RedMax. (MA6)  
MA6  
(1)  
(1) spark arrester  
MA8  
.025 in  
0.655mm  
GEARCASE AND CUTTERCASE  
(MA8)  
• Periodically refill the case with grease  
(every 25 hours).  
• REPLACEMENT PLUG IS A NGK  
CMR7H.  
• Use only lithium based greases.  
IMPORTANT  
• Note that using any spark plug other  
than those designated may result in the  
engine failing to operate properly or in  
the engine becoming overheated and  
damaged.  
(1) Screw  
(2) Seal washer  
(3) Grease: approx. 10cc  
(4) Air purge  
(5) Bolt  
• To install the spark plug, first turn the  
plug until it is finger tight, then tighten it  
a quarter turn more with a socket  
wrench.  
(6) Grease: approx. 5cc  
INTAKE AIR COOLING VENT  
WARNING  
TIGHTENING TORQUE:  
87~104 in-lbs  
• Never touch the cylinder, muffler, or  
spark plugs with your bare hands  
immediately after stopping the  
engine. The engine can become  
very hot when in operation, and  
doing so could result in severe  
burns.  
(9.8~11.8 N.m.)  
• When checking the machine to make  
sure that it is okay before using it,  
check the area around the muffler  
and remove any wood chips or  
leaves which have attached  
themselves to the machine. Failing  
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SGCZ2450S  
9. Maintenance  
to do so could cause the muffler to  
become overheated, and that this in  
turn could cause the engine to catch  
on fire. Always make sure that the  
muffler is clean and free of wood  
chips, leaves, and other waste  
before use.  
• Check the intake air cooling vent and  
the area around the cylinder cooling  
fins after every 25 hours of use for  
blockage, and remove any waste which  
has attached itself to the machine. Note  
that it is necessary to remove the  
engine cover shown in (MA9) in order  
to be able to view the upper part of the  
cylinder.  
PROCEDURES TO BE PERFORMED  
AFTER EVERY 100 HOURS OF USE  
1. Remove the muffler, insert a  
screwdriver into the vent, and wipe  
away any carbon buildup. Wipe away  
any carbon buildup on the muffler  
exhaust vent and cylinder exhaust port  
at the same time.  
2. Tighten all screws, bolts, and fittings.  
3. Check to see if any oil or grease has  
worked its way in between the clutch  
lining and drum, and if it has wipe it  
away using oil-free, lead-free gasoline.  
MA10  
MA9  
(1)  
IMPORTANT  
• If waste gets stuck and causes  
blockage around the intake air cooling  
vent or between the cylinder fins, it may  
cause the engine to overheat, and that  
in turn may cause mechanical failure  
on the part of the machine. (MA9)  
(2)  
(1) cylinder  
(2) intake air cooling vent (back)  
10. Storage  
• Aged fuel is one of major causes of  
engine starting failure. Before storing  
the unit, empty the fuel tank and run  
the engine until it uses all the fuel left in  
the fuel line and the carburetor. Store  
the unit indoor taking necessary  
measures for rust prevention.  
• Oil the blades.  
11. Disposal  
• When disposing your machine, fuel or  
oil for the machine, be sure to allow  
your local regulations.  
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SGCZ2450S  
13. Troubleshooting guide  
Case 1. Starting failure  
CHECK  
PROBABLE CAUSES  
incorrect fuel  
ACTION  
drain it and with correct fuel  
clean  
fuel tank  
U
S
fuel filter  
fuel filter is clogged  
out of normal range  
spark plug is fouled/wet  
plug gap is incorrect  
disconnected  
carburetor adjustment screw  
sparking (no spark)  
adjust to normal range  
clean/dry  
correct (GAP: 0.6 – 0.7 mm)  
retighten  
spark plug  
Case 2. Engine starts but does not keep running/Hard re-starting.  
CHECK  
PROBABLE CAUSES  
incorrect fuel or staled fuel  
out of normal range  
carbon is built-up  
ACTION  
drain it and with correct fuel  
adjust to normal range  
wipe away  
fuel tank  
carburetor adjustment screw  
muffler,cylinder (exhaust port)  
air cleaner  
clogged with dust  
replace  
cylinder fin, fan cover  
clogged with dust  
clean  
When your unit seems to need further service, please consult with our service shop in your area.  
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SGCZ2450S  
FEDERAL AND CALIFORNIA EMISSIONS CONTROL WARRANTY  
STATEMENT YOUR WARRANTY RIGHTS AND OBLIGATIONS  
The EPA (U.S. Environmental Protection Agency), CARB (California Air Resources Board), Environment  
Canada and RedMax are pleased to explain the emissions control system's warranty on your 2009 and later  
small off-road engine. In U.S. and Canada, new equipment that use small off-road engines must be designed,  
built, and equipped to meet the applicable Federal or Californian stringent anti-smog standards. RedMax must  
warrant the emissions control system on your small off-road engine for the period listed below provided there  
has been no abuse, neglect or improper maintenance of your equipment. Your emissions control system may  
include parts such as carburetor, ignition system, catalytic converter, fuel tank, filters and other associated  
components. Also, included may be hoses, belts, connectors, sensors, and other emission-related assemblies.  
Where a warrantable condition exists, RedMax will repair your small off-road engine at no cost to you including  
diagnosis, parts and labor.  
MANUFACTURER'S WARRANTY COVERAGE  
This emissions control system is warranted for two years or if the product qualifies for a longer warranty period  
resulting from the type of use, that period shall prevail. If any emissions-related part on your equipment is  
defective, the part will be repaired or replaced by RedMax.  
OWNER'S WARRANTY RESPONSIBILITIES  
As the small off-road engine owner, you are responsible for performance of the required maintenance listed in  
your Owner's Manual. RedMax recommends that you retain all receipts covering maintenance on your small off-  
road engine, but RedMax cannot deny warranty solely for the lack of receipts or your failure to ensure the  
performance of all scheduled maintenance. As the small off-road engine owner, you should however be aware  
that the RedMax may deny you warranty coverage if your small off-road engine or a part has failed due to  
abuse, neglect, or improper maintenance or unapproved modifications.  
You are responsible for presenting your small off-road engine to a RedMax distribution center or service center  
as soon as the problem exists. The warranty repairs should be completed in a reasonable amount of time, not to  
exceed 30 days. If you have any questions regarding your warranty coverage, you should contact RedMax at 1-  
800-291-8251 or via e-mail at [email protected].  
WARRANTY COMMENCEMENT DATE  
The warranty period begins on the date the engine or equipment is delivered to an ultimate purchaser.  
LENGTH OF COVERAGE  
RedMax warrants to the ultimate purchaser and each subsequent owner that the engine or equipment is  
designed, built, and equipped so as to conform with all applicable regulations adopted by EPA and CARB, and  
is free from defects in materials and workmanship that causes the failure of a warranted part for a period of two  
years.  
WHAT IS COVERED  
REPAIR OR REPLACEMENT OF PARTS Repair or replacement of any warranted part under the warranty  
must be performed at no charge to the owner at a warranty station. Warranty services or repairs will be provided  
at all RedMax distribution centers that are franchised to service the subject engines. Throughout the emissions  
warranty period of two years, RedMax must maintain a supply of warranted parts sufficient to meet the expected  
demand for such parts.  
WARRANTY PERIOD Any warranted part that is scheduled for replacement as required in the maintenance  
schedule, is warranted for the period of time prior to the first scheduled replacement point for that part. If the  
part fails prior to the first scheduled replacement, the part will be repaired or replaced by RedMax at no cost.  
Any such part repaired or replaced under warranty is warranted for the remainder of the period prior to the first  
scheduled replacement point for the part. Any warranted part that is not scheduled for replacement as required  
in the maintenance schedule, is warranted for two years or if the product qualifies for a longer warranty period  
resulting from the type of use, that period shall prevail. If any such part fails during the period of warranty  
coverage, it will be repaired and replaced by RedMax at no cost. Any such part repaired or replaced under the  
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SGCZ2450S  
warranty is warranted for the remaining warranty period. Any warranted part that is scheduled only for regular  
inspection in the maintenance schedule will be warranted for a period of two years. A statement in such written  
instructions to the effect of "repair or replace as necessary" will not reduce the period of warranty coverage. Any  
such part repaired or replaced under warranty will be warranted for the remaining warranty period.  
U
S
DIAGNOSIS The owner must not be charged for diagnostic labor that leads to the determination that a  
warranted part is in fact defective, provided that such diagnostic work is performed at a warranty station.  
CONSEQUENTIAL DAMAGES RedMax is liable for damages to other engine components proximately caused  
by a failure under warranty of any warranted part.  
EMISSION WARRANTY PARTS LIST  
1. Air-induction system*  
2. Fuel system*  
3. Ignition system*  
4. Fuel tank, cap and lines as applicable*  
*some components only covered up to point specified by maintenance schedule  
WHAT IS NOT COVERED  
All failures caused by abuse, neglect or improper maintenance are not covered.  
ADD-ON OR MODIFIED PARTS  
Add-on or modified parts that are not exempted by CARB or EPA may not be used. The use of any non-  
exempted add-on or modified parts will be grounds for disallowing a warranty claim. RedMax will not be liable to  
warrant failures of warranted parts caused by the use of a non-exempted add-on or modified part.  
HOW TO FILE A CLAIM  
If you have any questions regarding your warranty rights and responsibilities, you should contact your nearest  
authorized servicing dealer or contact RedMax at 1-800-291-8251 or via e-mail at [email protected].  
WHERE TO GET WARRANTY SERVICE  
Warranty services or repairs are provided through all RedMax authorized servicing dealers.  
MAINTENANCE, REPLACEMENT AND REPAIR OF EMISSION-RELATED PARTS  
Any replacement part may be used in the performance of any warranty maintenance or repairs and must be  
provided without charge to the owner. Such use will not reduce the warranty obligations of the manufacturer.  
MAINTENANCE STATEMENT  
The owner is responsible for the performance of all required maintenance, as defined in the operator's manual.  
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