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94 SN efi vapor lock hot fuel pump |
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Mikewolf 
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Joined: July-10-2018 Location: Ontario Canada Status: Offline Points: 48 |
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 Topic: 94 SN efi vapor lock hot fuel pumpPosted: June-23-2020 at 9:55am |
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My nautique starts great when the engine is cool, if I run for a while and then it sit with the engine cover open, it will restart as it should, if I leave the engine cover closed for 1-4 hours, it doesn’t want to start and there’s no fuel pressure. I can often fix this by pouring water over the fuel pumps to cool them.
I’m not sure where to start. Should I replace the hp fuel pump? The supply pump? Where do I find these? It’s a 94 with efi |
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Mikewolf
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Joined: July-10-2018 Location: Ontario Canada Status: Offline Points: 48 |
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Posted: June-23-2020 at 11:29am |
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https://www.skidim.com/mobile/prodinfo.asp?number=RA080022
Is this the one I need? Hard to tell from the description, but looks like my hpfp |
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gun-driver
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Joined: July-18-2008 Location: Pittsburgh, Pa Status: Offline Points: 4112 |
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Posted: June-23-2020 at 1:57pm |
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More information on what motor and ignition system would help but this may be the same pump as you listed.
Carter fuel pump |
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Mikewolf
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Joined: July-10-2018 Location: Ontario Canada Status: Offline Points: 48 |
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Posted: June-23-2020 at 2:48pm |
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That does look just like my pump. I may get it to try.
My boat has the 351 with the pro tec efi and a Dui distributor that was added when the original ignition failed. |
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Mikewolf
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Posted: June-23-2020 at 2:54pm |
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Fyi, that same carter pump is even cheaper at rock auto $95 for the p61171 pump.
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Jonny Quest
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Joined: August-20-2013 Location: Utah--via Texas Status: Offline Points: 2840 |
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Posted: June-23-2020 at 4:40pm |
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If you have EFI, I'm assuming that it is the Holley-based throttle-body EFI, correct? After ProTec ignition failed, are you still using ProTec ECM to run the EFI?
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Current
2003 Ski Nautique 206 Limited Previous 2001 Ski Nautique Open Bow 1994 Ski Nautique Open Bow Aqua skiing, ergo sum |
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Mikewolf
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Posted: June-23-2020 at 4:59pm |
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I’m running the tb Efi still off the pro tec ecu, but without the ignition. There was an old post about 2 years ago where I posted up the wiring diagrams, but I can’t seem to find it anymore.
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2001Sunsport
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Joined: October-07-2015 Location: MI Status: Offline Points: 86 |
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Posted: July-02-2020 at 12:33am |
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Might be a dumb question, but when is your fuel from? We've had issues here in Michigan as some of us bought a bunch of gas in April, forgetting the governor allowed winter blend to be sold through April 30th... Once warm weather hit in June we were hosed for hot restarts a few hours later. High RVP + heat soak = no start
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Gary S
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Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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Posted: July-02-2020 at 1:01am |
Here you go- link |
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Mikewolf wrote: