46
6. Carburetor
b. Judgments of the main check valve
●
As illustrated, hold a plastic pipe on the check
valve and blow and suck air by your mouth. If the
air is stopped by blowing, and open by sucking, the
valve has no failure.
●
In case of failure, soak the valve into gasoline for
about 10 minutes and repeat blowing and sucking
several times.
If this is not successful, replace the body assembly.
●
Make sure to check the valve in case fuel is not
supplied though the priming pump is operated.
c. Throttle valve normality check
●
Check that no wear exists in the throttle valve slide.
Carefully slide a screw driver tip along the plunger's
contact surface.
If the screw driver tip catches in a groove, replace
the carburetor assembly with a new one.
●
Check that no wear exists on the jet needle.
If there are signs of vertical linear flaws or wear,
replace the carburetor assembly with a new one.
Even small damage will increase fuel
consumption.
Plunger
Throttle Valve Assembly
Contact Surface
CAUTION
Jet Needle Portion
Damage Wear
Plastic Pipe
Main Check Valve
Body Assembly
