Author Topic: Alternator for MD21B  (Read 1881 times)

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Alternator for MD21B
« on: 15 July, 2011, 19:11:02 »
I have a Contest 38s ketch with an MD21B volvo and the original S E V. Marchal alternator stamped 72EE3702 which produces 35 amps.  I would like to replace it with a modern high output unit.  Can anyone advise a unit that is known to suit?

Offline BJ

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Re: Alternator for MD21B
« Reply #1 on: 16 July, 2011, 16:25:45 »
You can find a 60A replacement here   but I guess you can use most altermators to replace the original.


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Re: Alternator for MD21B
« Reply #2 on: 16 July, 2011, 17:58:34 »
Thanks for starting me off with a reference.  Using this as a start point  I have now searched the net and have found several manufacturers who can supply a new upgraded compatible alternator.  Interestingly, if I buy from a marine supplier then it works out about 80% more expensive than the same products from automotive dealers.  For others who may search, the following are worth looking at:-

DFJ Automotive ref DFJ010261 (70amp) at £152!!!!
Woods Automotive reference Valeo A13N234 (60amp) at about the same.

These are both straight replacements for the original, each with a W post for a modern tachometer

Offline sjoerd

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Re: Alternator for MD21B
« Reply #3 on: 17 July, 2011, 11:21:02 »
Hi Tumbles,

This is I'd say about right for nearly anything you need for the boat, the price nearly doubles as soon as some kind of "marine" sticker becomes attached. I usually buy a lot of my stuff at RV/caravanning shops and websites (things such as engine, 12V, AC, water bits etc.). Also its worth trwaling the net for any part numbers you see on filters, belts etc.

Obviously some things such as sails cant be dealt with that way. Other stuff like fresh water fitments (thru-hulls, hoses, elbows etc.) really should be marine grade.

Happy sailing,

SY Camelot
Contest 36S
Hull# 206
Fractional rig