The belt is slipping
The quickest way I know to burn out the diodes!With the yanmar gm30 running and the batteries switched off it runs smooth and quiet. With the batteries switched on the alternator squeals .
my yanmar dealer said when that happens the batteries are down tooo far and the alternator has to work too hard to get them back up......ask yer yannie dealer--see what he says
yes. i thought so as well--lol----he doesnt realize i am not as dumb as he looks lol.....Reminds of the time a bank teller told me, "I'm sorry sir you can not make a deposit to that account because it's overdrawn".:laugher :laugher :laugher :laugher