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Go Back   SailNet Community > General Interest Forums > Gear & Maintenance > Electrical Systems
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Old 05-28-2013
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Looking for 5" Alternator Pulley

OK all. I need a 5" (approx.) diameter alternator pulley, like the one off an old sev marchal 35 amp alternator. This alternator was standard on the 1979 MD7A Volvo-Penta engine. The hole diameter is 15mm. There has got to be one out there somewhere. I'm sure one of these alternators is sitting in a junk pile just waiting for the pulley to be removed and sent to me. Anyone? :-)

Thanks in advance for any useful replies.
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Old 05-28-2013
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Re: Looking for 5" Alternator Pulley

I had good luck with these guys, parts came as ordered and in good time. Big selection but you'll need to know exactly what you want or be prepared to do some browsing..

Search Results - GlobalIndustrial.ca
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Old 06-04-2013
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Re: Looking for 5" Alternator Pulley

Still need the 5" pulley. Anyone have an MD7A with the original alternator they have replaced and are now stuck with a useless (to you) pulley? :-)
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Old 06-04-2013
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Re: Looking for 5" Alternator Pulley

You should be able to go to any shop that repairs alternators and get a pulley, but be sure you give them exact specs including the belt size. We have found them by visiting the local junk yards but often had to remove the pulley ourselves or pay the yard to do it. Chuck
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Re: Looking for 5" Alternator Pulley

Thanks CapnChuck, but I've tried that. I've also tried searching the internet for a 5", single groove, 10 mm belt size, 17mm shaft pulley and am not coming up with what I need to ensure a correct fit. The only option left is to get an original pulley and bore out the shaft to the diameter I need to fit my already bought new alternator. It has a 17mm shaft. I still have my original 5" pulley on a rebuilt sev marchal alternator, but I don't want to risk messing that one up by boring the hole, thus the reason for the search.

Alternator shops and many other places have pulleys, but in order to keep the 2.5:1 drive to pulley ratio, I need the 5" pulley. Most of the pulleys I've come across are no larger than 3" now. About my only option is to keep searching for an old original sev marchal pulley.

Thanks all for helping me try and solve the problem. Keep it up please...until I find that pulley. :-)
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Old 06-04-2013
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Re: Looking for 5" Alternator Pulley

I would look at what you can get in a normal pulley from and industrial supply that will take a 17 mm bore
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Old 06-04-2013
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Re: Looking for 5" Alternator Pulley

Give this guy a call. He has thousands, not kidding, of old alternators. He has been very helpful to me w/ parts for my volvo that are no longer available.
Harley's Auto Electric, New London,Ct.
860-443-4445
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