Hey Misfitsailor, i was hoping to find a thread like this. I happened across a Lehr propane trimmer at a recycle place, tossed in with a lot of dirty 2-stroke trimmers. I first noticed the propane and then that it was a 4-stroke, and it seemed fairly clean and turned over nicely, so for $10 thought it was worth a try for something. It even had a mostly full propane tank. I cleaned it a bit and changed the oil, and it eventually came to life. It's running real nicely now but the throttle needs to be open more than I can set it to idle. I can't find any settings other than the idle screw, and wonder if our 6000 ft. altitude may be a problem. Anyway, I will probably try it as a trimmer for awhile, but am wanting to convert it into something. I may go the gas carb route. and try it on a floater plane. I've always wanted a 4-stroke gasser. I converted a Briggs 29cc years ago but it was only turning a 16-6 prop at 5k or so and is sooo heavy. Since this Lehr even has a clutch I thought an RC buggy may be fun.
Have you ever found an oldtimey floater for your engines? Also I noticed these engines were rated at 101 octane. Is that typical for propane, and would that mean these are higher compression than a normal engine? I notice these came out about 2009 and were gone in a few years. Now Lehr seems to be only doing propane outboard boat motors.

thx
Rod