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stalling out when gets warm.. |
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rosconole 
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Joined: May-10-2008 Location: United States Status: Offline Points: 759 |
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 Topic: stalling out when gets warm..Posted: January-30-2011 at 1:55am |
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I have been chasing down an issue and it seems usually low speed and in gear problem on my 89 after its good and heated up after about an hour or so of run time, has fresh plugs, rebuilt holly last year. new fuel filter ., new check valve in top of tank, new wires, new mallory distributor...
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1989 ski nautique ,1991 barefoot nautique, 1993 Mustang Cobra 1998 5.0 Magazine shootout invitee
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Luchog
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Joined: April-17-2007 Location: Argentina Status: Offline Points: 2135 |
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Posted: January-30-2011 at 4:54am |
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Hi, how long have you had this situation?
what's your idle rms and while in gear rpms? What's the advance on your distributor? Have you checked the carb's choke is opening all the way when engine's warm? Any signs of black smoke or fuel smell through the exhaust? |
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rosconole
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Joined: May-10-2008 Location: United States Status: Offline Points: 759 |
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Posted: January-30-2011 at 5:01am |
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since last yr , seems to do it sooner the higer the ambient temperature...I would say about 1200 rpms , when you come off plane it just shuts off and just starts running rough you have to keep at 1000 or better in no wake area or it will die ...real exciting coming into a dock or canal...not sure on advance on distributor. I have not checked to see if choke is opening all the way. no fuel smell in exaust or black smoke. some also said check main harness when it does it and see if its hot and ballast resistor..
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1989 ski nautique ,1991 barefoot nautique, 1993 Mustang Cobra 1998 5.0 Magazine shootout invitee
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eric lavine
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Joined: August-13-2006 Location: United States Status: Offline Points: 13413 |
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Posted: January-30-2011 at 11:03am |
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mft, hot coil? i had this happen but in the opposite, the engine wouldnt fire so an old timer suggested I heat the switchbox (outboard engine) with a heat gun...sure as sht it fired
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"the things you own will start to own you"
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LaurelLakeSkier
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Joined: February-12-2007 Location: Wisconsin Status: Offline Points: 485 |
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Posted: January-30-2011 at 12:16pm |
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Another possibility is a vacuum leak that develops as the engine heats up. I wouldn't think it would take an hour to show up but leaning out the mixture under the high vacuum conditions at idle could give the kind of symptoms you are having.
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The world is full of youth—what we need is a fountain of smart!
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form&function
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Joined: August-21-2009 Location: OK Status: Offline Points: 342 |
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Posted: February-03-2011 at 12:53pm |
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could be the pickup in the distributor expanding and grounding out as it heats up.Ive seen it on new distributors on cars.doesn't matter the brand all the parts come from timbucktoo.Float bowls could be off.Choke could be out of adjustment or just broke.Coil could be bad too,that would cause the same thing.Ive even fixed a supra with a weak connection at the harness plug by the main breaker.Ive also seen the alternator regulator over charge and scramble the distributor but you would probably smell that one.lol
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critter
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Joined: January-11-2008 Location: New Hill, NC Status: Offline Points: 1227 |
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Posted: February-04-2011 at 2:51am |
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I second the Hot Coil idea. Mine got hot after about an hour and the
boat had no power and would shut down at idle. New Blaster II took care of it. |
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1980 Ski Nautique
1966 Barracuda |
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rosconole
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Posted: February-04-2011 at 5:25pm |
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i have a pertronix coil I can give a shot...i talked to someone said the mallory distributor that was put in last year..has an adjustment on the inside...
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1989 ski nautique ,1991 barefoot nautique, 1993 Mustang Cobra 1998 5.0 Magazine shootout invitee
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