The original post was asking about setting the timing on a M70A engine which is a 2 cylinder. The M70B is a 3 cylinder. I have a NS70A which is a 2 cylinder and I am assuming is the same engine as the M70A. Both have "360-1" to start the serial number. I purchased this engine not working and somebody replaced a lot of parts on it. The guy that sold it to me said there was a spring he found laying there with no idea where it went and it is now lost anyway. I have not seen any diagrams showing a spring. The part with the timing marks has some play in it, so I thought it may go up under the fly wheel, but I am not sure. I replaced the fuel pump and the CDI unit and the motor will fire up and run at fast speeds if I play with the throttle link between the 2 carburetors. When I let them return to idle, the engine stops. Compression is good and I cleaned the carburetors. The fuel jets are adjusted at 1 turn and I have played with them also. The engine seems to fire up when I first try to start it. When I continue to try and start it after it has died, it does not even try to start. If I spray starting fluid though it will fire. It seems to me it has something to do with the fuel not getting through the pump..I know there is also this reed block assembly, but I do not know if those can go out of adjustment.
