Thx for any help. I have ordered a manual so soon I might be smart enough to post enough details to explain what I’ve got. For now, it’s 1 1/2 hp. It appears to be carbureted with an air control damper plate to control airflow to the carburetor body. The sparkplug is beneath the throttle body. There is a well anchored bracket that supports a valve rocker arm and a pushrod support sleeve. The pushrod itself runs horizontally from a cam device (near crankshaft) operated by engine RPM, so I assume it must be acceleratory to the method of ignition timing. This is the best I am do for now until my manual from IHC arrives. I am a certified aircraft repairman and I do well with manuals. Thanks leeansonWelcome to STAK...…
Post some details and I'll move your post/question to THE engine forum...….
They made some of the Model M's that were started and warmed up on gasoline poured into the carb bowl, and once warmed up, were switched over to run off the fuel in the tank, which could be kerosene.The name tag on both mine and shopdogsam’s engine have GASOLINE stamped on the tag! Does anyone have a clue why IHC would identify this engine accordingly?