"Red" wrote:

I was looking at a 3 cylinder yanmar a few weeks ago and found the
alternator belt was slowly being eaten. Since then I inspected 3
more
similar fairly new (all from new to less than 3 years old) racing
sailboats with the same engine and all were slowly eating belts.
Belt
tension was within normal limits on each. All of these engines had
110
amp alternators on a single belt pully.


Seems quite normal to me.

If you look at the Amp v RPM for that alternator, probably needs a
dual belt drive.

Lew