Gas engines & after-run oil

Jun 23, 2011 No Comments by

Q: I own a Ge20 ei (Zenoah G200PU) gas engine, model X374320000.  I ran it a few times and it was OK.  Then I set it aside for 6-8 months and then it would not run. I discovered that the carburetor fuel metering/diaphragm was no longer flexible.  So I got a repair kit and replaced it.  Now it runs perfectly. Thus I wonder how to treat gas engines after a run, ie., run totally out of fuel and/or put in “After Run”.  Thanks for the help and ideas. Followed you for more years that I’d care to mention.

A: You should always run an engine out dry at full throttle following a flying session and load with a good after-run oil. Hit the engines a few times more after it dies until it no longer fires. I note that you are in Manila, so no telling what is in the gas you are using that could be contributing to the problem.

Yours,
Clarence Lee

Clarence Lee, Editors Blogs, Gas

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Executive editor About me: I’m a publishing professional who has a passion for aviation and RC, and I love creating issues, books and a website that help RC pilots to enjoy this sport even more. I admire scale aircraft and enjoy the convenience of flying smaller electrics.
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