convert a lawn mower engine to steam or air

Step 8: Put it back together

after you have completed the testing you need to reassemble the engine so put the crankcase back together with the modified camshaft and put the head back on now for testing you want to use commpressed air so either tap the intake or the ehaust ( if you put the air into the exhaust it will run backwards) or you can make a fitting from a peice of metal and a gasket. now put the engine in a vice to hold it and and apply the air (  dont put to much pressure about 30-45psi) now take a scewdriverand turn the fly wheel until the engine starts turning if it stalls then the timing is off and the two valves are open at the same time. so tear it apart and grind some more if it does not stall then you are done!!!!!