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1999 Yamaha 99 4 Stroke Fuel Problems

westlc01

New member
"I recently purchased a boat w

"I recently purchased a boat with a 9.9 hp 4 stroke that would idel OK but die on acceleration. The motor had not been used for over 12 months.

I have removed, cleaned and rebuilt the carby with new gaskets, o-rings, float valve, float and pilot valve.

My problem is now the motor will not run unless I restrict the air intake with my hand. At which point it runs realy nicely. If I remove my hand the engine dies...

What have I stuffed up? Any ideas?????"
 
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