Honda WT30XK4 Manual page 39

TROUBLESHOOTING
ENGINE SURGES
Be sure the pump housing is filled with water when the engine is started or mechanical seal damage will occur.
Allow engine to reach normal operating
temperature.
Does not stabilize
Partially apply the choke lever.
RPM stabilizes
Loosen the fuel filler cap.
Does not stabilize
Drain the fuel tank and carburetor and refill with
fresh fuel.
Does not stabilize
Remove and clean carburetor. Replace intake
gaskets when reinstalling.
Inform the customer of proper storage procedures
and the importance of using fresh fuel.
4-4
Normal operation.
RPM stabilizes
Inspect governor linkage and carburetor throttle
Does not stabilize
lever for binding.
Repair or replace the binding or damaged parts.
Fuel filler cap not venting.
RPM stabilizes
Replace the fuel filler cap.
Normal operation.
RPM stabilizes
Advise customer to only use fresh fuel.