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Strange failure |
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subli572 
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Joined: August-09-2005 Location: Mexico Status: Offline Points: 23 |
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 Topic: Strange failurePosted: July-27-2017 at 4:27pm |
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Hi, I have a 1993 Ski Nautique with a Ford 351 Pro Boss engine, recently the eingine started to run low on RPMs after I sarted it and had black smoke that smelled like gasoline ,then the smoke turned gray, I had to adjust the carburator screw to set the RPMs higher.
I used the boat like that for like an hour since it worked just fine at high speed, and then the engine started work well, the RPMs got higher and there was no more smoke. This has happened every time I use the boat, I already changed the carburator gaskets, spark plugs and wires, coil and distributor cap (the boat has the retro kit), but the problem persists, any ideas? Thanks, |
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mark c
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Joined: May-09-2012 Location: Massachusetts Status: Offline Points: 534 |
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Posted: July-27-2017 at 5:18pm |
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Stuck float in the carb? Do you smell gas under the engine cover?
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GottaSki
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Joined: April-21-2005 Location: NE CT Status: Offline Points: 3327 |
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Posted: July-27-2017 at 5:34pm |
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Yes, float stuck, or PV diaphragm blown.
Have you viewed the carb during operation? At idle, you should never see fuel from the boosters |
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"There is nothing, absolutely nothing, half so much worthwhile as messing around with boats...simply messing."
River Rat to Mole |
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subli572
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Joined: August-09-2005 Location: Mexico Status: Offline Points: 23 |
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Posted: July-28-2017 at 11:45am |
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Thank you for your answers, I do smell gas under the engine cover, I'll check tomorrow the fuel from the boosters.
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Jonny Quest
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Joined: August-20-2013 Location: Utah--via Texas Status: Offline Points: 2842 |
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Posted: July-28-2017 at 2:57pm |
Sticky float or needle/seat is my first guess. Blown out power-valve is also a suspect. JQ |
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2003 Ski Nautique 206 Limited Previous 2001 Ski Nautique Open Bow 1994 Ski Nautique Open Bow Aqua skiing, ergo sum |
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GottaSki wrote: