GT engine has no power to fuel pump |
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Waternut
Senior Member Joined: July-11-2012 Location: Macon, GA Status: Offline Points: 292 |
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Posted: May-02-2019 at 2:59pm |
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A friend has a 98 or 99 air nautique with the 351 EFI GT motor. He recently replaced the steering cable and after an hour of boating afterwards, his boat stopped and wouldn't restart. It'll crank but won't run. Don't know if the two are related but yanking a big cable through the boat could've pulled something loose.
We've diagnosed it down to the fuel pump not getting power. Further diagnosis shows that the 50 amp breaker in the engine compartment has power on both wires. The 15 amp and 12.5 amp breakers don't have power to either wire so I'm guessing there is something here that is the culprit. However, the wiring is all bunched together and without a wiring diagram, I'm not sure what is supposed to send power to those. His kill switch is directly wired up because it failed a couple years ago so I don't think that's the issue. |
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phatsat67
Grand Poobah Joined: March-13-2006 Location: Indiana Status: Offline Points: 6147 |
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Check the small red wire off the battery that has a glass style fuse in it. If the fuse is blown or the wire is broken somewhere it will not send power to the ECU. Will crank but will not run or turn on the fuel pumps.
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man0seven
Senior Member Joined: September-16-2018 Location: Utah Status: Offline Points: 122 |
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Also the obvious, check the kill switch.
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2005 Ski Nautique
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phatsat67
Grand Poobah Joined: March-13-2006 Location: Indiana Status: Offline Points: 6147 |
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gt40KS
Gold Member Joined: August-05-2017 Location: Wichita Kansas Status: Offline Points: 943 |
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I might point out that my boat had also been directly wired when I bought it. Stuff can happen ... if the connection didn't get corroded enough to cause an issue, perhaps the fact that the two wires had been merely twisted together and loosely wrapped with a bit of electrical tape would have done it. It's all done proper now with an actual kill switch. But it never hurts to double check these things, even if you think they are fine
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JCCI
1995 Ski Nautique GT40 |
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Waternut
Senior Member Joined: July-11-2012 Location: Macon, GA Status: Offline Points: 292 |
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I agree. I checked it as well. It was connected with a twist connector and wrapped with electrical tape. I pull it all off and verified that the wires were still solidly together. My friend reported back that the glass fuse wasn't blown. |
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Online Points: 10642 |
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Go to the link below from the CCF reference section and look at section 6 and you'll now be able to say you have a wiring diagram section 6.8 has a wiring diagram of the fuel pump circuit. Any reference to the 10 way connector is wrong, it's an 8 plug connector on the PCM engines link |
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gun-driver
Grand Poobah Joined: July-18-2008 Location: Pittsburgh, Pa Status: Offline Points: 4112 |
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Relay
Jump the pumps see if that gets them running. Jump the pump like this |
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