Honda CRF110F - Fuel System Troubleshooting

FUEL SYSTEM
TROUBLESHOOTING
Engine cranks but won't start
No ruellc carburetor
- Fuel strainer clogged
- Fuel hose
clogged
- Floallevel misadjusted
- Fuel tank breat
her hose clogged
Too much fuel getting to the engine
- Flooded carburetor
- Clogged air cleaner
Fuel contaminated/deteriorated
No spar1< al plug (ignition system faulty)
Intake air leak
Improper choke operation
Improper throWe operation
Engine idles roughly, runs poorly or stails
Fuel line restricted
Improper choke operation
Ignition malfunction
Fuel contaminated/deteriorated
Intake air leak
Incorrect Idle speed
Incorrect float level
Throttle stop screw not adjusted properly
Low cylinder compression
Rich mixture
lean mixture
Clogged carburetor
Backfiring or misfiring during acceleration
• Ignition system fautty
• Fuel mixture too lean
Afterburn when engine braking Is used
• Lean mixture in slow circuit
Poor performance (driveabiUty) and lor poor fue l econo my
Fuel system clogged
Ignition system faulty
Air cleaner clogged
40 mm throttle limiter screw installed in the throttle housing (replace with
10 mm screw to allow full throttle) (page 3-6)
Lean mixture
Clogged fuel jets
Faulty float valve
Float level too
low
Blocked fuel fill cap air vent hose
Clogged fuel strainer screen
Restricted
tuelline
Clogged carburetor air vent hose
Intake
air leak
Throttle valve faulty
Rich mixture
Clogged air cleaner
Worn
jet needle or needle jet
Faulty float valve
Float level too high
Choke lever in CLOSE position
Air jets clogged
Flooded carburetor
6-4