Flywheel Forum

Readers' Engine Questions

| May/June 2004

39/5/1: U.M.A. Engine Q. I have been trying to identify this engine's manufacturer. As I understand it, United Manufacturers did not make engines. The serial number on this engine is 5211. I am trying to determine the year it was made and anything else anyone might know. Gary Knorr, Old Salem Road, Springfield, IL 62707 (

A: Your engine was manufactured by J. Thompson & Sons Manufacturing Co., Beloit, Wis. Page 513 of C.H. Wendel's American Gasoline Engines Since 1872 shows catalog cuts depicting the 'Thompson Tiger' line of engines. Further, page 3 of the May 1997 issue of GEM features catalog images of the Thompson line, including your engine, which is identified as a 2 HP model. The limited information available suggests your engine was current about 1912-1914. These engines were also sold by Lunt, Moss & Co., Boston, Mass., and possibly others.

39/5/2: Stewart Little Wonder I recently acquired this Stewart Little Wonder engine. I am missing the magneto cap and also whatever is connected to the little lever at the end of the governor shaft. Does anyone have a close-up of what should be there? I also need a clutch for a 2-1/4-inch shaft. Does anyone know where I could obtain one? Any other information would be greatly appreciated such as the year, horsepower, etc. Thanks. Don Leap, P.O. Box 703, Hyndman, PA 15545.

39/5/3: Unknown Tractor Does anyone know anything about this tractor? Is it a homemade machine? The only name on it is Jasper, which is cast in the rear housing. It has a Ford Model A engine and a belt pulley set-up. I'm planning on rebuilding the tractor, and I would appreciate any information about it. Thanks. John Fenske, 138 2nd Ave. S.E., New Brighton, MN 55112-7855; (651) 633-0129.

39/5/4: Cray Bros. Engine Enclosed are some pictures of a 1912 Cray Bros., Cleveland, Ohio, 2-1/2 HP engine. Manufactured by Caldwell-Hollowell Manufacturing Co., Waterloo, Iowa. An old friend of mine said he helped unload this engine from the train in 1912 and went with the owner by wagon to where it was set up in a blacksmith shop. I bought it about 30 years ago then had to sell it. Several months ago, I got the chance to buy it back. It is in very good condition, complete with the original clutch pulley and galvanized lid for the water hopper, but it is missing the crank guard.

I have never seen another one, and nobody in this part of the country I have talked to has ever seen one. I thought in the Midwest they might be more common as they were built in Waterloo. I would like to talk to anybody that has one of these engines or knows anything about them. I would also like to find a crank guard. Thank you. Harry W. Campbell, Box 241, Josephine, PA 15750; (724) 248-3913.