A "remedial" question of basic engine operation I'm sure, but it's been a looong
Day..
I'm helping someone rebuild a 4cyl ihc (300 model) tractor. New cyl. Sleeves, pistons, brgs. Etc.
Anyways..
Found TDC on pulley, lined rotor up to #1 cylinder, a little backfire..close enough i thought but no run. Looked at it again at TDC & it was off 180. Retimed it to TDC, & it fired right up.
Because of the Timing mark & rotor position & gear ratio how can it be you can NOT be at TDC & rotor @ # 1 cyl & not fire?
It would seem TDC is going to fire #1 cyl. No matter where rotor is, as long as it's on #1 cyl. (?)
Tired...
John