1997 GP 760 voltage/starting problems? - PWC Forum: The best hang-out for Personal WaterCraft enthusiasts
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Old 08-05-2010, 07:44 AM   #1 (permalink)
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Default 1997 GP 760 voltage/starting problems?

Hey all,

Let me first say, great site, and I did lots of searching before asking this question

The symptoms are that with a new, fully charged dry cell battery, the waverunner will start and run no problem, but randomly, about 20 minutes later, the low voltage code will flash on the dash. At this point, if you shut it off, it will not restart unless the main fuse is disconnected, then reconnected and if you let it run, it will do so flawlessly the rest of the day.

Also, not everytime, but sometimes the waverunner will turn over breifly after being shutdown with the code, and if it fires right away, then all will be fine, but if it doesnt start within one second, all power to the guage and starter is lost, and the main fuse must be disconnected and reconnected.

Furthermore, the fuse is the correct 10A fuse, there is no corrosion or evidence of tampering with the factory equipment related to the wiring, and the grounding wires (from what I can see) appear to be fine.

Ideas what im thinking is that possibly the fuse isnt the right length (if thats even possible and arcs in the holder), or possibly something else.

Also, as for trouble shooting, the terminals on the leads and the wires were cleaned of any corrosion with sandpaper and the battery was fully charged, as well as the wires being tightly secured to the battery.

I will keep searching but thought id post this and see what turns up!

Thanks for your help!
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Old 08-06-2010, 07:27 AM   #2 (permalink)
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Update:

Going to re-check the rectifyer/regulator for corrosion and make sure the 10A fuse is the right one, hopefully will work!
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Old 08-12-2011, 03:26 PM   #3 (permalink)
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Hey,
I have a 1997 GP760 twin and I am experiencing the same exact problem you asked about. Were you able to pin point the problem? I am being told it is the stator that is causing the problem but I am not sure that is the case because the battey voltage stays good. In advance thanks for youre help.
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Old 08-13-2011, 02:59 PM   #4 (permalink)
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Quote:
Originally Posted by 3taper View Post
Hey,
I have a 1997 GP760 twin and I am experiencing the same exact problem you asked about. Were you able to pin point the problem? I am being told it is the stator that is causing the problem but I am not sure that is the case because the battey voltage stays good. In advance thanks for youre help.
Hey there,

I did infact pin point the problem, turned out to be that the main fuse was replaced with one which was too short (in length) and did not make contact with both sides of the terminals, even though the difference was only 2mm or so. Since then, its ran fine.

However, another update related to hard starting, I checked the compression on the cylinders, turns out the front one was at 45psi and the rear at 110, which means its blown up. Fast forward to the tear down, and it turns out both pistons caught the ehaust port, removing the top ring and allowing it to be crushed against the piston and head. The front piston was worse as a huge chunk of the piston came off (approx. 1") and smashed up the head bad, as well as destroying the transfer ports. Before the tear down, it ran fine and still went as fast as ever, I took ownership with it like this, its actually a miracle it ran! Explains the terrible fuel mileage now!!
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