Still ,lets get back to the basic problem of a engine that want start.... JF it is turning over by the power of the starter and a charged battery......(1) Is it a 2 or a 4 stroke engine? (2) Remove the plug or plugs and preform a compression check,,,,(Always,,,, start here ,,,,,,, no exceptions,,,,,,, (2) See if you have spark at the plug or plugs,,,,(spark should jump a 1/4 gap ),,,, on most 2 &4 stroke engines,,,, Refer to manual on your motor,,,,,, (3) Next see if you have gas to the engine,,,,,, If you have all three ,,,,The engine should (hit),,,, BUT not necessarily,,,,,,START..... This is where you will have to bring a manual into the problem to see if the engine is receiving the correct amounts of the basic three, above,,