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 Post subject: W50 Alternator
PostPosted: 08 Nov 2018 12:51 
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Skipper

Joined: 24 Sep 2013 09:20
Posts: 310
I was thinking of replacing my stock alternator on my W50 before heading south to the Bahamas this year just because it looks like it's really old and also one of the mounting bolt holes stripped when I was tightening a new belt tension requiring me to thru bolt for mounting. Made me wonder what else was deteriorating on the inside.

I searched the forum and found lots of info, but I'm looking for exact info...like a link that someone says "buy this one, with these attributes, and connect it like this." Smile

I haven't had any problems with the stock charging capacity since mostly we rely on solar. But, is there a better alternator that I should get that is an easy switch out or should I just go with a "like replacement" to what I have? Where do you find either of these (like replacement or upgrade)?

Would this one on Amazon be the right one for an exact "like" replacement? https://www.amazon.com/ALTERNATOR-FITS- ... B013TCZCD0

I saw another post where this one was mentioned but it was for a W40. Would it work/be better? http://www.hamiltonferris.com/products/ ... egulated/9

I'm looking for simple here, but if it's just as easy to put on a 100 amp... Any thoughts or suggestions? Not really wanting to add extra regulators, different belts, pulleys, temp concerns and all that.

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Zach Duncan
SV Holiday
Hull# 280


 
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 Post subject: Re: W50 Alternator
PostPosted: 08 Nov 2018 19:34 
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Skipper

Joined: 14 Jul 2012 20:36
Posts: 295
My old Westerbeke, we had an Ample Power 100 amp, that's the most you can realistically run with a v-belt. It was a full system, with external regulator, echo charger and isolated. In your case look for a little bigger alternator, maybe 70-80 amps with an internal reg. What other means do you have to charge? Solar, wind, plug-in or is engine the main means to charge?

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 Post subject: Re: W50 Alternator
PostPosted: 08 Nov 2018 21:28 
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Skipper

Joined: 24 Sep 2013 09:20
Posts: 310
We use solar. Is there a link to a 70-80 amp alternator with an internal regulator that is the exact replacement for a W50? That's what I'm looking for. Thanks for any info.

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Zach Duncan
SV Holiday
Hull# 280


 
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 Post subject: Re: W50 Alternator
PostPosted: 09 Nov 2018 07:15 
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Tactictian

Joined: 16 May 2009 08:06
Posts: 103
Ray has a really good post on one of these recent threads about battery charging and voltage regulation. Well worth the read. My W-50 turned over 7,000 hours this summer and still has the stock alternator and stock regulator. The regulator is not internal but is down below the onboard fuel filter. With your alternate charging sources, you probably donít need anything more than what that setup puts out. You can fine an old fashion automotive electric shop and they could rebuild your alternator and even if you do buy a new one, I would suggest you do that and keep it as a spare. The alternator you tagged on Amazon looks right. It would surprise me if that was internally regulated but again, the regulator should be cheap and readily available. 1971 MGB had the same engine block and the voltage regulator LOOKS the same ($29.00 online) but I would do a bit more research before you buy.


 
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