Yamaha F100D - Page 229

6D93G11
9-8
1
2
3
4
5
6
7
8
9
Does the engine
start?
Wet spark plugs?
Within
specification?
Within
specification?
Failure in starting operation
Failure in starting operation
Check the fuel system.
Check the condition of the spark
plugs again.
Check the compression pres-
sure of the combustion chamber.
(5-3)
Check the valve
clearance. (5-10)
Adjust the valve
clearance.
Yes
Yes
Yes
Yes
No
No
No
No
Check the cylinder head, cylin-
der block, and piston assembly.
Wet spark plugs?
Start the engine using dried or
new spark plugs.
Yes
No
Check the fuel system.
Yes
No
Replace the main
and fuel pump relay.
Is there
continuity?
Check the main and fuel pump
relay for continuity. (8-11)
Power unit