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Post by mechanical1990 on Jun 15, 2011 12:09:36 GMT -5
I hit a bump that knocked some stuff loose, tightened it, but now I am running rich AND lean... the plug is a wet dark brown in some places, and at the tip, it is grey! GAH! How is this possible???
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theo547
Scoot Enthusiast
Posts: 497
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Post by theo547 on Jun 15, 2011 14:49:49 GMT -5
Sounds like a small air leak
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Post by 90GTVert on Jun 15, 2011 15:54:10 GMT -5
Could be an air leak as suggested or maybe you knocked debris loose and a pilot or main jet is partially blocked.
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Post by mechanical1990 on Jun 15, 2011 19:41:27 GMT -5
found it... I think... loose exhaust gasket... I hope
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Post by mechanical1990 on Jun 19, 2011 1:08:35 GMT -5
I have checked the carb, all is as it should be. Vacuum line is fine (sprayed water on it). Reeds are fine, as far as I can tell.
so that was not it... I ordered some new gaskets and am going to pull the engine apart and give it a good cleaning and check the piston and rings... I am thinking it may be a bad gasket allowing air in, or a bad piston ring. So, I hope that will work.
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Post by 90GTVert on Jun 19, 2011 11:13:11 GMT -5
I hope so too. Keep us updated.
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Post by mechanical1990 on Jun 21, 2011 22:49:58 GMT -5
Ok, so I can ride at 1/2 to 3/4 throttle and it stays fine (not rich or lean)... I will have to do this until I can get in the engine...  |
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Post by 90GTVert on Jun 22, 2011 7:21:00 GMT -5
Does it happen to be lean at below that RPM and rich above? If so that would mean you probably need a smaller main and a larger pilot. That wouldn't explain why it would just start doing it after a bump though. :stumped:
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Post by mechanical1990 on Jun 22, 2011 12:34:13 GMT -5
it seems like it runs fin up to 3/4... past that it is like it's running lean, then when I hit 40, it bogs down like it's too rich... makes absolutly no sense to me, so I am just trying to do anything I can think of other than replace the entire engine.
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