Troubleshooting; Engine; Hard Starting - Honda BF135A Manual

9. TROUBLESHOOTING

a. ENGINE

• HARD STARTING

• Use a known-good battery for troubleshooting.
Turn the ignition switch ON. Check whether
the MIL comes ON for 2 seconds.
Comes ON.
Check whether the warning buzzer sounds
twice.
Sounds.
Check whether the starter motor turns.
Turns.
Check the fuel level in the fuel tank.
Fuel level OK.
Remove the vapor separator drain screw
and check whether the fuel flows out freely.
Fuel flows freely.
• When gasoline overflow from the vapor sep-
Remove the spark plugs and check for wet
fouled electrodes.
Normal.
Dry the spark plug electrodes and check
whether the engine starts.
Does not start.
Check whether the cylinder compression is
normal (P. 2-15).
Compression OK.
Perform ignition system troubleshooting (P.
2-25).
2-14
Does not come ON.
Does not sound.
Does not turn.
No fuel or low level.
Fuel flow restricted.
arator is detected, check the vapor separa-
tor (P. 5-111 thru. 120).
Abnormal.
Low compression.
BF135A•BF150A
Perform ignition (power) system trouble-
shooting (P. 2-20).
Perform warning system troubleshooting if the
warning buzzer sounds twice but keeps
sounding (intermittent sound).
Perform starting system troubleshooting (P. 2-
23).
Add fuel and restart the engine.
Perform the following checks.
• Check for collapsed or pinched fuel line.
• Check whether the air vent knob of the tank
is closed.
• Check the primer bulb for air leakage.
• Squeeze the primer bulb and check whether
the fuel reaches the vapor separator.
If there is no problem, perform fuel supply sys-
tem troubleshooting (P. 5-96).
Perform fuel supply system troubleshooting
(P. 5-96).
Perform the following checks and adjust-
ments.
• Check valve clearance(P. 3-9)
• Check valve timing (P. 9-12)
• Check for loose cylinder head
• Check for damaged cylinder head gasket,
valves and valve seats.
• Check for worn pistons, piston rings and
cylinders.