Here are some facts about this engine.The bore is 2 916” and the stroke is 2 7/16”.When pulling the engine apart all of the bolts were just snug nothing tightened to proper specks.There was no sump cover gasket in place.The engine is a military green color with a M raised on the sump cover.The engine is also set up for a magnetron,no points.
With the help of Boudreaux in La. here is what we think the engine is.Series 9000,9k400,or10700 and a 3hp. Believe it could be a military grade engine used for training purposes because of all the lose bolts and the lack of gaskets.These are called shop engines and sometimes have a defect that students are required to find. This engine has a bent exhaust valve.Everything seems to point to this being a training engine or “shop engine”.