6-7
TRBL
ENGINE
ENGINE SPEED IS UNEVEN
Add.
Check the fuel level.
SUFFICIENT
INSUFFICIENT
Replace.
Check if fuel has deteriorated.
GOOD
DETERIORATED
Replace.
Check if the fuel tank cap is clogged.
GOOD
CLOGGED
Clean.
Check if the fuel cock is clogged.
GOOD
CLOGGED
Clean, adjust, or replace.
Check the spark plug for dirt and check the spark
plug gap.
GOOD
DIRTY OR OUT OF
SPECIFICATION
9
Tighten the carburetor
nuts securely.
9
Replace the carburetor
joint or gasket with a
new one.
Check if there is air suction from the carburetor
joint, gasket, or throttle shaft.
GOOD
NOT GOOD
Clean the parts.
Check if the slow or main passages such as, pilot
jet and main jet, in the carburetor are clogged.
GOOD
NOT GOOD
Adjust or replace.
Check the carburetor pilot screw turn out and float
height.
GOOD
OUT OF
SPECIFICATION
