Coolspring Spotlight: Circa-1899 20 hp St. Marys

A St. Marys engine residing at the Coolspring Power Museum had a history of pumping oil throughout Pennsylvania.

| June/July 2018

This is the old-style design of the St. Marys engine, which pertains to the valve placement on the engine. It has a vertical governor, hot tube ignition, and an unusual cast iron exhaust port pipe.


This particular engine pumped oil at several locations in Duhring, Pennsylvania, for the Duhring Development Co., which was owned by Chesebrough Manufacturing Co. — manufacturers of Vaseline. None of the oil from the Duhring field was ever used in the making of Vaseline, but it stood by as a backup. An actual oil sample from the well that this engine ran can be seen on the shelf.

A geared, walking-beam unit belt driven by this engine pumped one well, while at the same time, a rod-line connected to this geared unit pumped a second well some distance away utilizing an Oklahoma-style rod-line jack. Dr. Paul Harvey purchased the engine from Bill Summers and brought it to the Coolspring Power Museum in 1968.


Gas Engine Magazine A_M 16Gas Engine Magazine is your best source for tractor and stationary gas engine information.  Subscribe and connect with more than 23,000 other gas engine collectors and build your knowledge, share your passion and search for parts, in the publication written by and for gas engine enthusiasts! Gas Engine Magazine brings you: restoration stories, company histories, and technical advice. Plus our Flywheel Forum column helps answer your engine inquiries!

Be sure to take advantage of the Square Deal Subscription Program.

  • No Missed Issues.

  • No Renewal Notices.

  • No Additional Cost.

The Square Deal Subscription Program is designed as a paperless transaction with automatic renewals at a preferred low rate.   With advanced electronic notification, a 100% satisfaction guarantee and an easy opt-out plan, the Square Deal Subscription Program is the best value, risk free, eco-friendliest way to subscribe.

Facebook YouTube


Copyright 2018, All Rights Reserved
Ogden Publications, Inc., 1503 SW 42nd St., Topeka, Kansas 66609-1265