Mando alternator - replace old style w/ new

[bomar76]

I have an old style Mando 55 amp alternator with the V40 (mercruiser pn# 42785) external regulator on my 1986 Mercruiser 140. The excitor wires have become brittle and fell off while changing the belt. I would like to replace the whole alternator to the newer style Mando 55 amp (mercruiser #98555) that has the internal regulator. I see in the pics on Basic Power Indutries that it looks like a direct swap, in that it has the 2 excitor wire leads and the mounting looks identical. Anyone have any advice on this swap OR recommendations on a better choice?

 

[sea wolf]

Re: Mando alternator - replace old style w/ new

i had mine rebuilt. $85, compared to over 200 for a new one.

 

[bomar76]

Re: Mando alternator - replace old style w/ new

Basic Power has the Mondo 3 wire 55 amp for $129 (stock #MES3144), and the Delco style 3 wire for $119.95 (stock #MES3186) and that's with free shipping. All these have internal regulators, and I would really prefer the Delco style as diodes, etc are very easy to get at any NAPA or such. My concern is are they a direct replacement as to the mounts. OR should I just install a Delco 1 wire unit......???

 

[Trent]

Re: Mando alternator - replace old style w/ new

Just install the delco 1 wire unit. You can get it locally and install this kit to make it marine and save a few bucks.<br /><br /> web page

 

[bomar76]

Re: Mando alternator - replace old style w/ new

Thanks for the advice. I am going to go with the Delco 1 wire and order a screen kit Monday. I wasn't aware they sold marine conversion kits for them. Thanks again!

 

[wheels4]

Re: Mando alternator - replace old style w/ new

Delco 1 wire is the way to go.I put one in my boat with the marine kit.They are available from any NAPA.