Thanks Rick. Where are the numbers located on the engine? I can't find anything on my cases bul "L101 on one case amd L102 on the other.Wayne from my understanding stroke is same in all just the bore is different if you give me the serial # off your motor i can tell you exactly what model and year model L was 5hp model L I was 6.6hp and model L S was 7.6 hp if there are no serial numbers itll be a model L and would be 1938 or earlier and should be looked at as a museum piece as there were only 2464 of them made prior to marking them with numbers. 2465 was the 1st # marked in 1939. 2465-95441 are 1939- 1954. M5566 - M 31000 are 55- mid 58 these are all 5 hp. M 31001-2M51800 are 59-66 all number until this are made by studebaker in south bend indiana they also made the Avanti. # J7600 and up are 7.6 hp made between 67 -75 with the cast molds from studebaker but not at studebaker. hope this helps
Guy I got it from thinks it's a late 50's or early 60's . It has a 1950 chrysler 240 standard piston in it. Thay are a much cheaper replacement than an OEM piston.
Just guestimating from the outside diameter of the jug, I would say that the bore looks like 3 1/4 or 3 3/8 inches