Black dawg
Registered User
The above posting makes some good points but it will not tell you if your at tdc or 180 degrees out. This is a little information about all the gear sizes in these idi engine. The crank gear is half the size of the cam gear. Reason for that is the crank turns twice to one of the cam. Now the injection pump gear is exactly the same size as the cam gear. So it turns one time same as the cam does. This might be amazing to some but its simple phsycics.
yep, have to verify compression stroke, or you are still just guessing. thanks for pointing that out