1G-11 Fuel System:
Diagnostic Information and Procedures
Carburetor Symptom Diagnosis
B827H11704001
Condition Possible cause Correction / Reference Item
Starting difficulty Clogged starter jet. Clean.
Clogged starter jet passage. Clean.
Air leaking from joint between starter
body and carburetor.
Tighten, adjust or replace gasket.
Improperly working starter (enricher)
plunger.
Adjust.
Idling or low-speed
trouble
Clogged or loose slow jet. Clean or tighten.
Clogged slow jet passage. Clean.
Clogged pilot outlet port. Clean.
Clogged bypass port. Clean.
Starter (enricher) plunger not fully
closed.
Adjust.
Improperly set pilot screw. Adjust.
Incorrect float height. Adjust.
Medium-or high speed
trouble
Clogged main jet. Clean.
Clogged main air jet. Clean.
Clogged needle jet. Clean.
Improperly working throttle valve. Adjust.
Clogged fuel filter. Clean or replace.
Incorrect float height. Adjust.
Starter (enricher) plunger not fully
closed.
Adjust.
Overflow and fuel level
fluctuations
Worn or damaged needle valve Replace.
Broken needle valve spring Replace.
Improperly working float Adjust or replace.
Foreign matter on the needle valve Clean or replace with needle valve seat.
Incorrect float chamber fuel level Adjust float height.
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