| [GMCnet] Alternator? [message #147730] |
Mon, 24 October 2011 20:43  |
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Steve[3]
Messages: 13
Registered: September 2011
Karma: 0
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Junior Member |
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Over the weekend, I "rebuilt" my carburetor and reinstalled it today. I was running the engine to get it warmed up and get some of the adjustments dialed in but, after about half an hour it started to run more and more poorly until it died (due, in part at least, to a poorly adjusted carb). When I tried to restart it, it turned over very slowly. I managed to get it started a couple times but couldn't keep it going. It died again and that was the end of it. Now it just clicks.
Is this most likely the alternator or could it be something else like the regulator?
The battery is brand new. There were no warning lights.
It might also help to keep in mind that a couple of weeks ago when I replaced the belts, I noticed that the alternator shaft had some play in it. Also, the motorhome has been sitting in salty sea air (north San Diego county) for over 10 years without moving.
Thanks for your help,
Steve Thomas
78 Eleganza II
Santa Cruz, CA
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| Re: [GMCnet] Alternator? [message #147732 is a reply to message #147730] |
Mon, 24 October 2011 20:58  |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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Senior Member |
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| Steve[3 |
wrote on Mon, 24 October 2011 21:43]Over the weekend, I "rebuilt" my carburetor and reinstalled it today. I was running the engine to get it warmed up and get some of the adjustments dialed in but, after about half an hour it started to run more and more poorly until it died (due, in part at least, to a poorly adjusted carb). When I tried to restart it, it turned over very slowly. I managed to get it started a couple times but couldn't keep it going. It died again and that was the end of it. Now it just clicks.
Is this most likely the alternator or could it be something else like the regulator?
The battery is brand new. There were no warning lights.
It might also help to keep in mind that a couple of weeks ago when I replaced the belts, I noticed that the alternator shaft had some play in it. Also, the motorhome has been sitting in salty sea air (north San Diego county) for over 10 years without moving.
Thanks for your help,
Steve Thomas
78 Eleganza II
Santa Cruz, CA
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Steve,
The battery may have been brand new, but that does not mean it had a full charge. I suggest that you charge it, get a meter and start a diagnosis.
Did you check for an alt light during start-up??
Nothing says it was actually working before.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: [GMCnet] Alternator? [message #147752 is a reply to message #147732] |
Tue, 25 October 2011 03:34 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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Charge the battery. Start the coach. Put a meter across the battery. Is it reading around 14.0 volts? If so, then the alternator is OK. If not, go to the isolator and measure the voltage at all three posts. The center should be around 14.7 while the top and bottom should be around 14.0. If you are reading 14.7 on the center then the alternator is OK.
Make sure the belt is tight and not slipping before checking the above voltages. An incorrect width belt with cause the alternator pulley to slip.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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