Boats For Sale:
BFN backfires at 4600 rpm |
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ultrahots 
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Joined: September-08-2004 Location: United States Status: Offline Points: 618 |
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 Topic: BFN backfires at 4600 rpmPosted: August-31-2015 at 11:15pm |
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So it is Popping out the carb or just running out of throttle ? If it is backfiring there could be a number of things wrong. More info will be needed.
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michiel200
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Joined: August-17-2009 Location: netherlands Status: Offline Points: 101 |
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Posted: August-31-2015 at 6:09pm |
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I'll try to explain.
At 4600 rpm, the engine does not climb in revs anymore (WOT was previously 5100 rpm). It produces a banging noise from the carb. Like it is misfiring. It's not the choking sound of an engine that does not get enough fuel at high revs, Thanks for your help! |
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'92 BFN
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GottaSki
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Joined: April-21-2005 Location: NE CT Status: Offline Points: 3359 |
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Posted: August-30-2015 at 10:14am |
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Please explain in detail. Is it trueky back firing out the exhaust, or farting out the carb? People use the term backfiring liberally.
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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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michiel200
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Joined: August-17-2009 Location: netherlands Status: Offline Points: 101 |
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Posted: August-30-2015 at 4:52am |
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I own the boat for six years now, never opened the carb.
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'92 BFN
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Jonny Quest
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Joined: August-20-2013 Location: Utah--via Texas Status: Online Points: 2957 |
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Posted: August-30-2015 at 2:16am |
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Your problem is likely due to either timing or carburetion.
Since ProTech manages the spark/timing, ProTech could be the problem. However, that is not the symptom my ProTech was showing when it failed, but that doesn't mean that yours isn't about to crap-out and is the cause of your back-fire problem. When was the last time that your carb was re-built? 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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michiel200
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Joined: August-17-2009 Location: netherlands Status: Offline Points: 101 |
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Posted: August-29-2015 at 5:21pm |
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My '92 Barefoot with 5.8 HO PCM is backfiring at 4600 and will not allow higher rpm. Below 4600 rpm no problems. It starts, idles and accelerates fine. The engine still has the notorious Protec ingition. Coils look oke, no leaks.
Is this the first sign the Protec is shot? |
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'92 BFN
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