> Would slippage cause the voltage to drop or would that only happen > temporarily once it's going again?
That's an excellent question. Hopefully another lister with recent alternator troubleshooting experience will respond. My SWAG is once the belt stops slipping the alternator's output will vary slightly with engine RPM up to the point the regulator sees what it needs. IIRC, the charge level and the battery's ability to absorb the charge may also affect the alternators voltage output. Do you know have far your battery's have been discharged? Martin Calypso 1971 C&C 43 Seattle [Description: Description: cid:D1BF9853-22F7-47FB-86F2-4115CE0BAF2F] From: CnC-List [mailto:[email protected]] On Behalf Of Edd Schillay via CnC-List Sent: Thursday, July 31, 2014 11:28 AM To: Gary Russell Cc: C&C List Subject: Re: Stus-List Alternator? Belt? Suggestions? Gary, There may be some signs of slippage as I often hear some squealing during the initial startup which lasts until I change the RPMs or after 10-20 seconds. Would slippage cause the voltage to drop or would that only happen temporarily once it's going again? All the best, Edd Edd M. Schillay Starship Enterprise C&C 37+ | Sail No: NCC-1701-B City Island, NY Starship Enterprise's Captain's Log<http://enterpriseb.blogspot.com/> On Jul 31, 2014, at 2:25 PM, Gary Russell <[email protected]<mailto:[email protected]>> wrote: Hi Ed, Is the belt showing any signs of slippage? Is the inside of the belt shiny? It might be that one of your alternator diodes are gone reducing the output. You can take the alternator to an automotive alternator shop and he can test the diodes or if you have a VOM with a diode test function you can test the diodes yourself. It could also be your regulator, but if you are still charging, that would seem less likely. Gary S/V Expresso C&C 35 Mk II ~~~~~~~_/)~~~~~~ On Thu, Jul 31, 2014 at 2:12 PM, Edd Schillay via CnC-List <[email protected]<mailto:[email protected]>> wrote: Listers, Lately, when the engine running, I'm seeing the voltage reach 13.2 tops when it used to be much higher (13.7 to 14.0). Is this an alternator issue or is it the belt tightness? Any suggestions would be much appreciated. All the best, Edd Edd M. Schillay Starship Enterprise C&C 37+ | Sail No: NCC-1701-B City Island, NY Starship Enterprise's Captain's Log<http://enterpriseb.blogspot.com/> _______________________________________________ This List is provided by the C&C Photo Album Email address: [email protected]<mailto:[email protected]> To change your list preferences, including unsubscribing -- go bottom of page at: http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com
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