Originally Posted by Maine_bill
Thanks for all the advice
...lot to absorb, but in the end I think I've decided on four (4) 6volt T105's ....
My next question ...
Will my current alternator
be adaquate to charge them
I "think" it is a Motorola Y3N3S..rated at 37 amps...it was rebuilt by the PO in 2012
is a 24 hp Universal
That sounds like a stock alternator for that engine. 24 hp? Universal made an M25 and an M25XP at 21 and 23 hp. What specific engine model?
I have an M25 in our '86 boat
and replaced the stock Motorola 55A alternator with a 100A aftermarket alternator with an external regulator
MC-612 (now the 614 model). Skippers use belt (or amp) manager and Small Engine Mode features of the regulator
plus temperature sensing of both battery
bank and alternator to de-rate the alternator output to avoid overheating
. A bigger alternator running at less than its max output will work
just fine and better and cooler than trying to max out any alternator. Do a Google
search on this forum for many detailed discussions of those features. Our 100A alternator works just fine a 60A continuous output for a while until the battery
acceptance reduces the amp flow. Search around on battery acceptance, too.
Don't use your stock alternator with an external regulator, it won't work
, it will overheat the alternator, which is too small for your system.