Hercules Engine News

Including Economy, Arco, Jaeger & Thermoil

| April/May 1995

  • Hercules built engine

  • Hercules built engine

20601 Old State Rd. Haubstadt, Indiana 47639

Rebuilding the governor on Hercules built engines is usually a simple matter if a step by step procedure is followed. Although there are slight differences between the governors used on the one piece block small engines and the larger three piece block engines, the steps are the same. There are also a few differences between the earlier governor and the later 'H & S' model governors. To complicate matters further, many engine governors today are mixtures of the different model parts put together.

The accompanying illustration, although for the larger engines, shows all the important parts referred to in the article to follow.

Begin with the removal of the entire governor assembly from the engine. On most engines, an offset screwdriver will be a big help to reach in and loosen the slot head bolts used on most engines. Be careful to not let the governor spindle rod fall out (if it is of the 'H & S' type). If the end of the rod falls out, you can usually find it, but the little ball will bounce away and hide forever.

Remove the governor weight pins. If they are worn, make new ones from stock of the original diameter (3/16'). Peen one end and drill a cotter pin hole through the other end.

Remove the governor spindle rod, spring and any spacer washers. The head of the spindle rod may have notches worn in it where the governor weight fingers touch it. The other end of the rod may be worn off from turning against the detent arm finger. A new rod can be made from a ' diameter carriage bolt. Make the new rod slightly longer than the old one.


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