stanley baer wrote:

Does anybody know what the efficiency of a lovejoy coupling would be
as opposed to removing the front bearing of the generator and coupling
it hard as is done with commercial units?

Efficiency? It should be so close to 100% you'd have trouble measuring
it. It will probably
devlop some heating as it absorbs the power stroke pulsations of the
engine. But, if this
heating is excessive, it will smoke the rubber part, maning you need a
bigger coupling.
A 25 Hp coupling designed to take IC engine punsihment is going to be
pretty big!

Jon