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Old 08-26-2005, 06:52 PM
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Alternator or other electrical problem ?

I have a 1972 Kona jet boat with a 455 olds. I am the original owner. Last year I had all of the gauges and wiring replaced due to a short in the electrical system that couldn’t be found. That problem was cured. However since those repairs were done late last summer and the boat was stored for the winter I didn’t release there was another problem that was starting to surface. Prior to going on vacation I replaced the battery with a new one and went to the local lake to make sure all was well mechanically. After starting and stopping the battery went dead. Prior to the battery going dead I noticed the voltmeter to read a couple of “hairs” above 12. I assumed the original 2-wire alternator (Motorola Type B 35 AMP) with the regulator attached to the backside of the alternator had gone bad. I then purchased a brand new (no rebuilt) Prestolite/Leece-Neville alternator that was a replacement for the original Motorola alternator. Again, back to the lake. After starting the engine the voltmeter read a couple of “hairs” above 12. After stopping and starting the voltmeter read below 12 and then eventually to 10. I took the alternator back to where it was purchased and they told me it would be replaced if it were bad. The alternator was tested and I was told it was ok. Any ideas or direction would be greatly appreciated for this novice. Thank You.

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Old 08-26-2005, 07:04 PM
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No Juice in the Jet

Check you're grounds, boats don't usually have
metal frames, so you're ground connections become big deals.
just a thought.
Keep Your Wheels Turn'n
D
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Old 08-26-2005, 07:10 PM
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Regarding the wires to the backside of both alternators in question; there is only one wire with a slip type connector coming from the voltage regulator. I have to attach another wire to the positive post of the alternator. Sorry for any confusion.
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