A Missing Cotter Pin

| October/November 1992

464 South Fifth St. Sebewaing, Michigan 48759

I was visiting with a fellow exhibitor at a gas engine and tractor show watching one of his engines running, when there was a loud bang, and the engine stopped dead.

When we looked the engine over we found a worn cotter pin, washer, and spring laying on the ground. It was from the intake valve. The vacuum in the cylinder sucked the valve into the cylinder!

The man took the head off and there laid the intake valve. The valve stem looked like a pretzel and it also bent the exhaust valve head.

I'd like to offer this tip to everyone in gas engine land. Check those cotter pins in your engines. Also check the intake and exhaust valves. If your engine has a threaded valve stem, check the jam nut and make sure it's tight.


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