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OS FS 91 Surpass 4 stroke testrun


Active member
Have a lot of different size glow engines so made an adjustable bench for testing the different 2 stroke and 4 stroke glow engines. Here is a short rundown on the build and test of the bench as well as a test of my old OS FS-91 Surpass 4 stroke that haven't been started in 20+ years.

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