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Yamaha 4 Stroke Yamaha 4 stroke engines

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Old 10-05-2009, 03:49 PM   #1
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Fx 140

Engine idles has no power above idle when you goose throttle will try to go can get to 30mph at times
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Old 10-05-2009, 04:57 PM   #2
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Re: Fx 140

Quote:
Originally Posted by jmf5555 View Post
Engine idles has no power above idle when you goose throttle will try to go can get to 30mph at times
Change the plugs & check oil level, also check air filter for oil contamination!...........This really should be a sticky!
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Old 10-06-2009, 08:19 AM   #3
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Re: Fx 140

changed plugs oil level ok ran with out air filter mane no difference also took out fuel pump and check filter screen ok
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Old 10-06-2009, 08:23 AM   #4
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Re: Fx 140

Is the motor running OK?

Have you checked impeller condition & clearance.

Spec for the clearance is 0.35mm - 0.45mm
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Old 10-06-2009, 12:16 PM   #5
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Re: Fx 140

motor has same condition when out of water with hose connected to flush connector impeller is ok no check engine lamp on i keep looking at a fuel problem????
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Old 10-06-2009, 06:13 PM   #6
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Re: Fx 140

next step would be to drain the gas and start fresh. or possibly check your compression
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