Yamaha F15 4 Stroke Idle Problems

annakyn

Recruit
Joined
Jul 29, 2009
Messages
1
Hi. I'm having some issues with my 2004 F15 4str Yamaha (single carb). I'll run through start to finish of what's happened...

Ran ok start of season for 5 mins then cut, no start. Took it in, turned out there was a lot of gunk in the carbs and fuel system. Flushed it all out, cleaned carbs, new filter, cleaned all lines. New spark plugs. New fuel, cleaned tank.

Then would start but won't idle. Cleaned carbs again. Fuel pump wasn't pumping properly so replaced. Still no idle. It will continue to run if left on choke, or if revved, but won't idle. Both jets are clear. Carb is spotless!

Been back to dealer for help, and last thing I can think of changing is gaskets between carb and manifold for possible air leak. Can anyone think of anything else that I could check/rule out?

I've only had the o/b for 1 season but it ran a dream all season with no issues at all. Thanks in advance!
 
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