Craftsman 636.796670 User Manual
Sears. Roebuck and Co., Chicago, IE. 60684 US. A.
8209S00101 4/88
PRINTED IN JAPAN
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TWO YEAR LIMITED WARRANTY ON CRAFTSMAN
BUSHWACKER 836.796670
For two years from date of purchase, when this BUSHWACKER is maintained, lubricated, and tuned up accordtrtg to the
operating and maintenence instructions in the owner's manuai. Sears will repair free of charge any defect in material or
workmanship
This warranty excludes blades, spark plug., and air cleaner; which ara expendable parts and become worn durlno normoi
use.
If this BUSHWACKER is used for commercie! Or rental purposes, this warranty applies for only 30 days from the data of
g purchase.
WARRANTY SERVICE IS AVAILABLE BY CONTACTING THE NEAREST SEARS SERVICE CENTER/DEPART-
« (WENT IN THE UNITED STATES. This warranty applies only while this product is in use in the United States.
This warranty gives you specific legal rights, and you may also have other rights which very from state to state
SAFETY RULES AMD PRECAUTIOMS
1 Before each operation, make sure that the screws are not
loose or missing, that the components are not damaged,
and that the blades are not chipped off or cracked. If a
blade is chipped or cracked replace it with a new one.
2, Do not attempt engine or blade adjustments or refuel
ing before allowing the engine and muffler to cool,
a. Do not remove the fuel tank cap while the engine is
running or when it is still hot.
b. Clean off fuel tank cap area before refueling,. Do not
smoke white refueling.
c. Take care not to spilt any fuel. If it is spilled, wipe it
off.
d. Never operate on gasoline only As this engine is of
2-cycle type, use mixed fuel whose mixture ratio is
16:1 (1 gal, gasoline to 8 oz. oil) and a proper lubri
cation oil such as Sears Catalog Number 36555,
3. Do not operate the machine when your physical condi
tion is not good. Never touch the plug cap during opera
tion to protect yourself from electric shock.
4 Never operate the machine wherever ventilation is not
enough,
5 Before starting the engine, make sure that the blade does
not touch anything In startup of the engine, be careful
not to turn the blade toward bystranders. Position
BUSHWACKER securely.(in startup, place BUSHWACK
ER in a level place so as to prevent the blade from
moving )
6 Wear sale clothes (safety shoes, goggles, earmuffs, gloves,
etc i Never wear loose clothing or jewelry while operat
ing your BUSHWACKER,
SEARS, ROEBUCK AND CO '
DEPT.698/731A
SEARS TOWER
CHICAGO, ILLINOIS вОбВЛ
7. Do not admit any persons or animals within the working
area (30 feet or lass from the site). When plural operators
work together in the same place, maintain at least a
30 feet distance from each other and exchange warning
shouts if necessary. Pay special attention to keep by
standers, especially children away from the working site.
8 Stop the engine and pay special attention to the blades
whenever you carry the BUSHWACKER from one place
to the next before and after operation.
9
Never let any child handle the machine.
10.
Use BUSHWACKER only for cutting of young trees,
grass, etc. of which diameter is 0.2" or less. Never use
BUSHWACKER to cut metals or other hard materials.
11.
Never operate BUSHWACKER In a bad weather condi
tion (rain, snow, strong wind, abnormal atmospheric
temperature, etc )
12.
Keep this manual in place so that one can refer to it
repeatedly for safety operation and to teach possible
users how to operate the machine.
VUFAR VOUn
CAUTION: The operation of any BUSH
WACKER can result in Foreign objects
being thrown into the eyes, which can
result in severe eye damage. Always wear
safety glasses or eye shields before com
mencing power tool operation., We re
commend Wide Vision Safety Mask for over spectacles or
standard safeb/ glasses, available at Sears Retail or Catalog
Stores,
Know ¥OyR BUSHWACKER
Your new BUSHWACKER has been carefuhy packed at the factory to prevent damage during shipping and storage,
however, even with the best of preventative measures, damage does sometimes occur It is recommended that you follow the
check out procedures listed below: _
Remove all items from the carton, lay them out and check the parts to be sure that you have everything required for
assembly. Also check carefully for any visible damage.. (IN THE EVENT THAT SOMETHING IS DAMAGED OR MISSING
OR BOTH, NOTIFY YOUR SEARS STORE IMMEDIATELY )
You should familiarize yourself with the various parts of your BUSHWACKER before attempting to assemble or operate
the unit Refer to drawing below.
SPECIFICATIONS
TYPE 2 cycle air-cooled
DISPLACEMENT
Ш
CARBURETOR Diaphragm type
s
FUELTANK
5
CAPACITY
z
LU
SPARKPLUG ■
20.3 cc {1.24 Cu. In.)
17.5 U.S. ft. oz, {0.5E1
NGK BM7A or CHAMPION CJ 6«
LUBRICATION Fuel oil Mixed 16 to 1
{1 gal. gasoline to 8 oz. oil)
DRYWEIGHT
DIMENSION
10.5 lbs (4.8 kg)
35.5 X 8.7 X 8.6 in.
‘SEARS CATALOG NUMBER-36402
FRONT HANDLE
GUIDE PLATE
OVERALL LENGTH
Ш
TOOTH PITCH 0.98"
LJ
<
ENGINE RPM
Ш
CUTTING STROKES
PER MINUTE
DRIVE SYSTEM
CLUTCH TYPE
CLUTCH ENGAGE.
MENT
BLADE DRIVE
STARTER KNOB
18"
8000 rpm
32 2 times/sec (8000 rpm)
Dry Centrifugal
3800 rpm ±200 rpm
Double cam drive
START/STOP SWITCH
THROTTLE
LEVER
UPPER BLADE
REAR HANDLE
FUEL TANK
SHIELD
LOWER BLADE
Specifications are subject to change without notice.
PREP4B1MG FOR OPERATIOM
Fuai and oil mixture
inspect the fuel tank and fill with clean, fresh fuel of
the proper mixture This engine requires a mixture of
16 parts gasoline to 1 part oil |1 gal gasoline to 8 oz
oil) Use 71-36555 Craftsman Engine Oil or a high grade
two cycle engine oil.
WARNING: Experience indicates that alcohol blended fuels
(called gasohol or using ethanol or methanol) cart attract
moisture which leads to separation and formation of acids
during storage Acidic gas can damage the fuel system of an
engine while in storage.
To avoid engine problems, the fuel system should be emptied
before storage for 30 days or longer. Drain the gas tank, start
the engine and let it run until the fuel lines and carburetor
are empty,- Use fresh fuel next season See Storage Instructions
for additional information
Never use engine or carburetor cleaner products in the fuel
tank or permanent damage may occur.
DO NOT MIX GASOLINE AND OIL DIRECT
LY IN THE ENGINE FUEL TANK.
IMPORTANT: Failure to follow proper fuel mix
instructions could result in serious damage to
the engine
5, To avoid a burn, do not touch the engine during the
operation or immediately after stopping, the engine.
Handle the engine after it is completely cooled.
6, Never operate BUSHWACKER on unstable ground or
standing on tiptoe Never use it while climbing a ladder,
7, Do not use the BUSHWACKER continuously for a long
time. It is normal to take a break of 10 to 20 minutes
after every 50-minute operation.
8, Never leave the BUSHWACKER running unattended,
9, if there is any trouble during operation, be sure to stop
the engine first, (Move the switch to STOP )
STARTIMCi AUD STOPPING
1, When starting the engine, set the switch to START.
(Figure 1)
CAUTION:
When preparing fuel mixture, mix only the amount needed
for the job you are to do Do not use fuel mixture that has
been stored longer than two (2) months Fuel mixture
stored longer than this will cause hard starting and poor
performance If fuel mix has been stored longer thart this
time it should be replaced and filled with a fresh mixture.
CAUTION! NEVER over Fill Fuel Tank
NEVER add fuel to the tank in a closed un-ventilated area,
00 NOT add fuel to this unit near an open fire or sparks.
BE SURE to wipe off spilled fuel before attempting to start
the engine,
DO NOT attempt to refuel an extremely hot engine.
Check paints before operation
CHECK for loose bolts, nuts and fittings
Clean the air filter of all dirt, etc before the operation.
PRECAyTIOMS I3UR1MG OPERATIOIS
1. if the blades have stopped orr account of a branch
caught during the trimming, be sure to stop the engine
and eliminate the branch. Refrain from cutting too
hard or too thick a branch lover X" in diameter),
2. When the machine is running, never touch the blades
Never point the blades toward a person.
3 Hold BUSHWACKER firmly with both hands.
The choke control is a "Lever" type, (See. Figure 2). To
2
choke the engine, push the choke lever to "Close"
position, NOTE: If the engine is warm, it may be
started with the choke lever mid-way between "OPEN"
and "CLOSE", depending on the individual engine.
4, The engine speed must not be excessive but just enough
to do the cutting
3. Puii the throttle lever a little, push the throttle knob
. and lock the throttle lever at the starting position,
(Figure 31
Figure 3
4, Pull the recoil starter several times. (At this time, hold
the machine securely so as to keep it fixed,)
(Figure 4)
The carburetor is not filled with fuel. Pull the starter 7 to
8 times to feed up fuel from tank to carburetor.
without a load, otherwise the engine will run at a high
speed reducing engine life.
Stopping the Engine
1 Reduce the engine rpm to idle by releasing the throttle
2, Set the stop switch to stop. (Figure 1)
Blade sharpening
If the edges are rounded and do not cut well arty more,
grind off only the shaded portions. Do not grind the
contact surfaces (sliding surfaces) of the top and bottom
edges. (Figure 5)
Caution: — Never let go of the starter rope from its fully ex
tended state. Return the starter rope to its original
position while holding it securely.
— Be careful not to break the starter rope.
■
'■-I
Figure 4
5. After starting, open the choke lever by degrees to the full
. and reset the throttle lever to the low speed, while check
ing the engine operating state.
Caution: — In starting of the engine and during operation, be
fully careful to keep bystanders or obstacles off
the operating side and confirm safety requirements
for operation.
6, After starting the engine, warm up the engine (for about
■ 5 minutes at medium speed). Immediately after starting,
speed up the engine slowly Never open the throttle fully
Note: 1) Before grinding, be sure to secure die blade
firmly
2) Wear gloves, protective glasses, etc.
3) An edge ground too much at a time or ground
many times will loose its hardened layer It
becomes rounded and dull very quickly in
use. Order replacement blades from Sears Re
pair parts.
Adjustments
SPARK PLUG MAINTENANCE - If the spark plug
electrode area has an excess of carbon buildup, the
efficiency of the plug will be seriously reduced.
REMOVE THE CARBON WITH A SPARK PLUG
CLEANER OR WIRE BRUSH
After cleaning the spark plug RESET THE
ELECTRODE GAP TO 024- 028 .
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