I think the alternator failed - Page 4 - GL1800Riders
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post #31 of 38 (permalink) Old 01-08-2017, 09:42 AM
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Have you received the alternator yet and if so is it actually a Mitsubishi?
Glen's bike is in my shop and I've already installed and tested the new alternator.
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post #32 of 38 (permalink) Old 01-08-2017, 12:08 PM
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What's your thoughts on it Fred? Does it have a tag on it that says Mitsubishi?
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post #33 of 38 (permalink) Old 01-08-2017, 12:44 PM
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No markings other than the one tag in the photo. You can see some slight differences in the case, so I suspect it is a knock off and not made my Mitsubishi. I think the Sears site lists it at 80 amps. The OEM Honda alternator capacity spec in the manual says it is a 1.2 kWatt alterator at 5Krpm. If you multiply 80 amps by 14 volts, you get 1,120 watts, so it looks very close in the "listed" capacity.

So just judging by the amp rating on it, it looks like it will work, and it does fit the bike and plugs in just like the OEM alternator. When I start the bike, it brings the voltage up to about 14.2 volts so it looks like it works ok. The real proof will be in seeing how long it lasts. Glen seems to put a lot of miles on his bike (currently over 250K) so I guess we'll know fairly soon how reliable it is.

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post #34 of 38 (permalink) Old 01-08-2017, 12:54 PM
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Carrying a spare alternator is very easy to do with a GL1800 and could save a lot of time and money, I've been hauling one around for about 200,000 miles and never needed it while on the road so it must also be a very good good luck charm.
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post #35 of 38 (permalink) Old 01-09-2017, 04:55 PM
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Glen's bike is in my shop and I've already installed and tested the new alternator.

Fred, how badly plugged are the diode fins on back of alt? At 82k, mine were very plugged. Can't help the cooling of alternator.
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post #36 of 38 (permalink) Old 01-09-2017, 07:21 PM
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Fred, how badly plugged are the diode fins on back of alt? At 82k, mine were very plugged. Can't help the cooling of alternator.
They looked similar to yours, if not worse.

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post #37 of 38 (permalink) Old 01-10-2017, 08:52 AM
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Quote:
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Fred, how badly plugged are the diode fins on back of alt? At 82k, mine were very plugged. Can't help the cooling of alternator.
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They looked similar to yours, if not worse.
Can they be cleaned while still on the bike?

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post #38 of 38 (permalink) Old 01-11-2017, 12:15 PM
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Sorry to do this here but Fred H. did you get a PM from me?
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