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post #6 of Old 06-19-2012
cwyckham's Avatar
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Re: Westerbeke W 27 Alternator upgrade

Sorry for dredging up a very old thread, but I am trying to do precisely the same thing with a Balmar 7 series 110A.

I'm not sure where to find the right part numbers for pulleys. How big a job is that to replace the pulleys? Is it as easy as it sounds? I could also just derate the alternator somewhat and keep the existing belt, but I'd obviously rather do it right.

Which Balmar fits? None have the 2" saddle of a mitsubishi alternator, so I assume you can use the saddle type 7 series and some shimming is required? Will I also need to replace the adjuster bar, as it looks like the bolt to bolt radius is different on the Balmar?

Any help is much appreciated. I'm going to try to do this in the middle of the cruising season, so I don't want to be down for weeks waiting for parts I didn't know I needed or discovering that it won't fit after all because I got the wrong Balmar.

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