David Kerzel plans

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New Member
Jan 20, 2019
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Would anybody be able to point me in the right direction for the David Kerzel Hit Miss engine plans? I did some searching on line but was not able to find and links.

Thank you GreenTwin

Has anybody built this engine without using piston rings?
Hi James
Don't be put off making your own piston rings. It's fun and you will get a real sense of achievement.
My video below shows the method I used for the very first time. I've used the same method several times since then and always had great success. It takes less than a day to make several rings. Good luck!
Not this engine, but I build a similar (the one in my Avatar picture) which has a 1" piston and is running without any piston rings. Kept the diameter of the cast iron piston 0.01 mm (4 tenths in imperial) smaller than the steel cylinder. With some lubrication it really works well.