I am replacing the Hitachi LR155-20 alternator on my Yanmar 3GM30 with
a Balmar unit. Can anyone tell me what the T-shaped 2 wire plug on
the old alternator is for? I assume its for the tach. Its a t-shaped
plug labeled 'R' and 'L'. The wires are red and orange or brown, its
kind of hard to tell.

Thanks...

Drew
J/35 - FastForward