Idle Problems

Post here for issues with outboard engines (i.e Yamaha 9.9) on PDQ yachts
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36041
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Idle Problems

Post by 36041 »

All,

One of my 2001, 9.9 Yammy's will no longer idle at a reasonable rpm. I have the idle screw backed all way out so that it is not even touching the armature, but yet the engine idles twice as fast as it should.

Has this happened to you? Any ideas? All input is appreciated.

Regards,
Tom

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Marc Gershel
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Post by Marc Gershel »

Hi Tom, I had the same problem, and I fixed it , but I'm not really sure how I did it. I fooled around with the linkage adjustment turnbukle screw, but I think what really did it was spraying WD-40 on the carburator linkage arm and working it back and forth. I know it doesn't sound very hi-tech, but I have't had the problem recur in over in 3 years.
Regards, Marc
Aquila 32/31
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Post by Aquila 32/31 »

If it isn't a linkage problem causing the throttle plate to stick open, it could possibly be a bad gasket causing an air leak.
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36041
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Solution

Post by 36041 »

Thanks for the input guys. I disassembled the injector assembly and cleaned it up as well as soaked it over night in cleaner. When I put it back together it mysteriously started working correctly again. I think the problem was in the spring mechanism under the injector body. A little WD 40 probably would have fixed it.

Thanks again,
Tom

http://www.tendervittles.net
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