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Honda 90 warm start intermittant problem?

garyk Hello, we have a 1999 Honda BF90 4 stroke with a very frustrating problem. Cold start is fine. But warm starts are problematic. Makes the motor undependable and has put us in danger twice.

The problem happens after running the BF90 some miles a
2002-07-18
Frank Martin all major motor motor makers recomend either seperate suply lines all the way back to the tank or a three way selector valve but i dont think this is your starting problem . i have had the same problem on two diferent motors one 2 hp one 50 hp hondas both motors had intake valves that where too teight check the valve lash adjustment this may be your problem 2002-07-18
hondon Frank is right on both counts.This thing should ideally have a separate fuel source for the kicker or a way to isolate the engines like a gate valve at the water separator that I hope you also have.Valve adjustment is part of your regular maintainance and should be done every 100 hours.These valves get tighter as they wear and a tight exhaust valve will cause your exact symptoms.Hard starting warm. 2002-07-19
garyk Thank you very much OMCFrank and Hondon, in nearly three years no one has suggested that possible problem.

Thanks too for suggesting - 'gate valve at the water separator' to isolate the supply lines. I'll check the marine store today.

Thanks again for taking the time to reply!
2002-07-19
Deeps I have had simular problems with my Merc 850. It starts fine cold, but when the motor is warm it is difficult to start. Could the tight valve be the problem on a Mercury?

If so, could you elaborate on how I can adjust the value? I have minimal outboard maintenance knowledge.

Thanks
2002-07-19
Bear Sorry Deeps,
You have a two stroke. The Honda is a four stroke.

Bear
2002-07-19

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