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3.
The appropriate clearance between two electrodes of spark plug
is 0.7 to 0.8 mm. Adjust to the correct clearance when it is too wide or
too narrow.
Clean thoroughly or replace the spark plug if it has accumulated car-
bon or contaminated.
For replacement, use NGK CMR6H.
0.7 mm – 0.8 mm (0.028" – 0.031")
4.
To close the plug cover, make a half turn of it, and press around
the dented part.
► 1. Plug cover
Cleaning the fuel filter
CAUTION:
Make sure there is no damage on the fuel tank.
If there are any damage on the fuel tank, ask authorized service
center immediately for repair.
NOTICE:
Clean the fuel filter regularly. Clogged fuel filter may
cause difficulty of start-up or failure of engine speed increase.
Check the fuel filter regularly as follows:
1
► 1. Fuel tank cap 2. Fuel filter 3. Hose clamp
1.
Remove the fuel tank cap, drain the fuel to empty the tank.
Check the tank inside for any foreign materials. If any, wipe clean
such materials.
2.
Pull out the fuel filter with wire through the fuel filling port.
3.
If the fuel filter surface is contaminated, clean it with gasoline.
1
3
2
14 ENGLISH
NOTICE:
Follow the method specified by each local authority
for disposing the gasoline used for cleaning the fuel filter.
NOTICE:
Replace the fuel filter if it is excessively
contaminated.
4.
After checking, cleaning or replacing, insert the fuel filter into the
fuel pipe and fix it with the hose clamp. Reset the fuel filter in the fuel
tank and tighten firmly the fuel tank cap.
Adjustment of idling speed
CAUTION:
The carburetor is factory adjusted. Never adjust
other than idling speed. For other adjustments, ask your autho-
rized service center.
Appropriate low-speed rotation is 2,800 min
If it is necessary to change the rotation speed, adjust the idle speed
with a Phillips screwdriver.
If the engine stops or runs unsteadily at idle, turn the adjusting screw
to the right, and the idling speed increases. If the machine blows too
strong at idle, turn the adjusting screw to the left, and the idling speed
drops.
1
► 1. Idling adjusting screw
Checking throttle valve
If the control cable is bent or caught, the throttle valve does not con-
tact with the idle adjusting screw, and it prevents the engine from
proper idling. In such a case, reposition the control cable to ensure
proper valve movement.
► 1. Throttle valve 2. Idling adjusting screw 3. Control cable
4. Throttle valve stopper
-1
(rpm).
1
3
2
4
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