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 Post subject: 5.8L OMC wont idle right
PostPosted: Thu Jun 03, 2010 9:59 pm 
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Tadpole

Joined: Sun Dec 20, 2009 8:47 pm
Posts: 4
Hello everyone. New to the site, as I just purchased a 93 Sundowner 215...The boat is in pretty good shape, and I cant wait to get this on the water. I drained the old fuel, installed 2 new batteries, and changed the plugs. I got it to start, but it searches for a constant idle rpm. It goes from about 1200 down to 700, back to 1200...and so on and so forth. When I accelerate, it does the same thing. Does anyone have any ideas? I am getting ready to take this thing to a mechanic, but it sure seems like it must be something small.


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PostPosted: Thu Jun 03, 2010 10:37 pm 
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email admin your custom rank
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Joined: Wed Aug 15, 2007 2:22 am
Posts: 795
Location: Melbourne, Australia
Could be a whole range of things as it sounds like it may have sat around for a while. My initial guess is maybe the carb needs an overhaul - gaskets dry out and it sucks in air etc. Best to let your mechanic have a look at it first as it may not be the carb so might work out cheaper to have him troubleshoot the problem rather than replace things randomly.

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Alec

2006 Horizon 190
VP 4.3GL/SX, Sunsport


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PostPosted: Fri Jun 04, 2010 12:33 am 
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Tadpole

Joined: Sun Dec 20, 2009 8:47 pm
Posts: 4
This boat is fuel injected. If it was carb, I would have already rebuilt it, just as a precautionary measure.


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PostPosted: Fri Jun 04, 2010 6:09 pm 
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Sting Ray

Joined: Fri May 15, 2009 7:48 am
Posts: 71
Location: Kingston Ontario
If its TBI check your base gaskets, could be a vacum leak, fuel filter.

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2000 235 Sundowner
Previously 2007 Horizon 190
2004 Chevy Avalanche Z71


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