Mystery Inverted Engine

Thiem & Co. inverted engine offers many questions and no answers

| March 2000

  • The mystery engine
    The mystery engine
  • The mystery engine
    The mystery engine

  • The mystery engine
  • The mystery engine

This month's Vintage Iron photographs come from Roger Moe, Springfield, Minn. I met Roger at the Central Hawkeye Swap Meet last May at Waukee, Iowa. I had a block of an inverted Webster engine on my trailer. Roger stopped by and said he had an inverted engine that he hadn't been able to get much information on. 

The name cast on the base of his engine is Thiem & Co., St. Paul, Minn. It has a 4-1/2-inch bore and a 7-inch stroke. The crankshaft is 1-5/8 inches in diameter, and the cam shaft is 1-1/4 inches. The exhaust valve has a 5/8-inch stem and a 1-3/4-inch head. The flywheels are 28 inches in diameter, but are not the originals. He is missing the intake valve cage, valve and carburetor, which bolted on four studs opposite the engine. It looks to have been a hit-and-miss governed engine, although most of the governor parts are missing except for the latch catch on the exhaust valve cam follower. The number "2" is cast on the block. It is drilled for some kind of crankshaft shield, which is also missing. Roger did a search at libraries in St. Paul, and came up with the following listings:

1890: Edward Thiem, boilermaker for Kenny Bros.

1892: Edward Thiem, machinist for St. Paul Roofing & Cornice Works

1897: Edward A. Thiem, proprietor of Northwestern Machine & Cycle Works

1897: Thiem & Co. (bicycle specialties)


Farm Collector April 16Farm Collector is a monthly magazine focusing on antique tractors and all kinds of antique farm equipment. If it's old and from the farm, we're interested in it!

Save Even More Money with our SQUARE-DEAL Plan!

Pay now with a credit card and take advantage of our SQUARE-DEAL automatic renewal savings plan. You'll get 12 issues of Farm Collector for only $29.95 (USA only).

Or, Bill Me Later and send me one year of Farm Collector for just $34.95.

Facebook Pinterest YouTube