Diff between PUH and PU G260 motors?

[SeaHawk]

I am in the middle of rebuilding two bergen gas birds. One of the engines is a G260 PU and the other is a G260 PUH. What is the difference?

[cbergen]

The PU engine may have started life as an airplane engine, removal of the prop hub, adding the pull start and dawg, and changing the muffler to the heli style gives you the exact same motor.

Another way to tell is if the primary coil on the PU is Gray vs Red on the heli. This gray coil has slightly different timing to make "propping" the engine easier. It has very little, if any, effect at operating RPM.

[SeaHawk]

yep, one's read and one's gray. Both work well....well, the PU did until I stripped the muffler bolt, asked for helicoil or back nut and got it back with a larger stud which I can't use with my unobtainium mufflier cause the nuts too big:(