Yamaha EF2800i - Inverter Generator, Service Manual

Page: 74 / 103

3-46
ENG
TROUBLESHOOTING
ENGINE SPEED IS UNEVEN
Check fuel level.
SUFFICIENT INSUFFICIENT Add.
Check if fuel is deteriorated.
GOOD NO GOOD Replace.
Check if fuel cock is clogged.
GOOD NO GOOD Clean.
Check spark plug for dirt and
check spark plug gap.
GOOD NO GOOD Clean or adjust.
Measure valve clearance.
GOOD
OUT OF SPECI-
FICATION
Adjust.
While the engine is operating, pull
the choke knob approximately 1/3
to 1/2 way out, and then check the
engine operating condition.
STABLE UNSTABLE Inspect from **.
Check for air suction due to a
damaged throttle shaft seal, car-
buretor joint, or gasket.
GOOD NO GOOD Disassemble or replace.
Check if slow or main passages
such as, the pilot jet and main jet,
in carburetor are clogged.
GOOD NO GOOD Disassemble or clean.
*