How can I determine which stroke the engine is on when on TDC? There are
two times when the crank passes TDC for each one of the cam. In the old
days I would just start it up and upon the first backfire I would know. In an
"interterence" engine this sort of test could be disastrous.
Find the number one cylinder, remove plug, turn crank to the timing mark on it,you will be in time.
Remove the number 1 spark plug and put your thumb over the spark plug hole. Have a helper bump the start with the ignition switch until you start feeling pressure building under your thumb. You're now coming up on the compression stroke of the cylinder. Now line up the timing marks on the engine. HTH. - Jim
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