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99 pro air GT-40- cuts out under power |
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Johnpsteed 
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Joined: September-01-2015 Location: columbus GA Status: Offline Points: 3 |
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 Topic: 99 pro air GT-40- cuts out under powerPosted: September-01-2015 at 4:32pm |
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I really need some help with my 99 Pro Air Nautique with the GT-40.I have had nothing but problems this year but have all been pretty easy to fix until now.
This past weekend I took it out and was running fine on Friday, ran good for the most part Saturday but started to die out under power but would pick right back up about 2 seconds later. Started to rain so took it back the the dock and that was pretty much it. Sunday, took it out and was running like a champ, went to get gas and they had a hard time filling the boat, worse than it already was but its always been a pain. Left the marina idled out fine, got into the gas it stumbled and cut off and made a gasping sound out the intake. Fired right back up and did the same thing, started it again and put it in neutral and revved it up and it was fine, put it in gear it skipped really bad and died. Pulled the gas cap off to check for a vacuum, left it off and gave it gas, same thing happened again it died...... any ideas where to go next? Recently put new plugs, 60 and 15 amp circuit breakers, exhaust tubes, and impeller. Thanks in advance!! |
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*mtrbtr*
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Joined: October-30-2012 Location: Manhattan, MT Status: Offline Points: 173 |
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Posted: September-01-2015 at 4:57pm |
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Fuel pump?
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2006 SV 211 (sold) went to the dark side
97 Sport Nautique (sold) 89 PS 190 (sold) 05 Four Winns H180 (sold) 89 Four Winns 180 Freedom (sold) 75 MFG (sold) |
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Hollywood
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Joined: February-04-2004 Location: Twin Lakes, WI Status: Offline Points: 13523 |
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Posted: September-01-2015 at 5:51pm |
Recent overheat? When is the last time it ran right? This has me thinking choked up exhaust. |
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Johnpsteed
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Joined: September-01-2015 Location: columbus GA Status: Offline Points: 3 |
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Posted: September-01-2015 at 6:14pm |
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It did overheat, ran fine Friday but didn't really do too much and also ran great for the most part Saturday till the end.... Just surprised at how well it ran Sunday just before it started doing this!
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IAughtNaut
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Joined: August-22-2010 Location: TN Status: Offline Points: 2568 |
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Posted: December-01-2015 at 2:07am |
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check the clip on your kill switch, they've been known to get loose over time
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Toertel
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Joined: August-26-2013 Location: Atlanta Status: Offline Points: 775 |
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Posted: December-01-2015 at 5:04am |
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When was your last tune up?
Cap, rotor, wires, coil etc? |
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1994 Sport Nautique
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lewy2001
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Joined: March-19-2008 Location: NSW Australia Status: Offline Points: 2234 |
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Posted: December-02-2015 at 6:43pm |
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If you're going through hell, keep going
89 Ski <a href="http://www.correctcraftfan.com/diaries/details.asp?ID=5685" ta |
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Tim D
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Joined: August-23-2004 Location: United States Status: Offline Points: 2641 |
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Posted: December-02-2015 at 11:20pm |
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Have you checked the little fuel line inside the FCC?
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Tim D
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harriss28
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Joined: July-24-2010 Location: Titusville PA Status: Offline Points: 128 |
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Posted: December-07-2015 at 9:11pm |
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i had similiar issue. The fuel pump relay(s) were the problem
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jhersey29
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Joined: February-20-2014 Location: Colorado Status: Offline Points: 272 |
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Posted: December-07-2015 at 11:25pm |
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Grab your self the Actron and put on the fuel rail. Just leave it on, Zip tie it to the water line. When it starts to act up take a look at the pressure. Should stay steady at 39ish.
Drain the FCC into a 24 ounce or larger jar. Is there water in the drained out gas? I also had a similar issue due to the rubber cover not on the cap and wires and the spark plug wires were cross talking to the TFI-IV and messing it up. |
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tryathlete
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Joined: April-19-2013 Location: Lake Villa, IL Status: Offline Points: 1799 |
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Posted: February-05-2016 at 9:47pm |
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Sounds like a visit to the Poor Man's GT40 troubleshooting guide is in order. I'll toss my guess to check the anti-siphon valve. I don't know if that thing if plugged up would prevent the tank from venting but that might explain why it was really hard to fill up.
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2008 MasterCraft 197TT
1996 Nautique Super Sport 1988 Waterlogged Supra Mariah |
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tryathlete
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Joined: April-19-2013 Location: Lake Villa, IL Status: Offline Points: 1799 |
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Posted: February-05-2016 at 9:53pm |
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I would check the fuel vent for clogging or for a collapsed vent line hose.
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2008 MasterCraft 197TT
1996 Nautique Super Sport 1988 Waterlogged Supra Mariah |
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ScottZ
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Joined: January-20-2004 Location: Clanton, AL Status: Offline Points: 1164 |
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Posted: February-14-2016 at 10:19pm |
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Have you come to any resolution of our problem?
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Scott Zuelzke
Lake Mitchell , AL 1984 Ski Nautique 1972 Skier |
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Johnpsteed wrote: