I'm converting a 3 cyl tractor to an alternator.
Pulley on the new 10-SI I bought from Napa was for a 7/16" wide belt. I need a 1/2" belt.
So I went back and bought a 1/2" pully ~ $9.
The 1/2" pully is 3 3/16" dia vs 2 5/8" on the original 7/16".
That's about a 30% difference.
I know an alt will charge at idle but am curious how that 30% will affect charging rate on a slow revving tractor engine.
Back when the machine shop was still operating it would have been an simple task to widen the small pully on a lathe. But alas, no lathe now.
Thanks in advance...