First engine project built with scrap materials and a bunch of that looks about right planning. Mostly aluminum and a little brass with two pieces of steel for the connecting rod pin and the piston rod and delrin for the bushings. Didnt really draw up any plans, I just figured as I went. The sizes were determined by the hunk of round stock I had for the cylinder and everything just went from there. It took a long time to get the valve timing right !
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