I've had this engine laying around for a few years now. It used to pull a 33% Extra that weighed in around 23 pounds. When I obtained the engine it was propped with a 22-10 Zinger and revved about 6,700 rpm or so. Pretty low rpm count is my opinion as well, but it had been running one of the old super restrictive Bennett mufflers/exhaust deflectors at the time.

I've been informed that the engine could be a 4.2 Sachs or a 4.4 Husky. From Precision Eagle or some other conversion source. Heck, I don't know. I've torn down the engine to check for a possible stuck ring and figured that while it's down it would be a good time to post some photos in the hope of a more complete engine ID. This would help immensely in obtaining the correct muffler for it.

Con rod appears to be bronze with a bronze wrist pin/bushing. Needle bearing at the crankshaft end.

I don't have an inside mike but the bore is just a smidge under 48.5mm. Carb is an SDC 40 Walbro. Another question about the carb. Anyone know what the short angled screw is just above the metering needles? If it's not an idle adjustment screw I don't have a clue to its purpose.

I'll be uploading a bunch of pics for visual clues. Thanks for the help folks. It's really appreciated.