I am wondering where is the timing inspection window for the flywheel? It has the Case magneto. I took the magneto off to file the points and tried keeping it the same but I ended up having to move the spark plug wires one hole cw so it's incorrect. (Not sure if I bought it wrong or if I did it or if it happened in the rotor gear or main drive) I believe one spark plug hole would equal a half turn on the main drive. Also the timing advance ° procedure would be helpful. It seems to run kind of advanced but hard to say. I try turning the whole mag cw but it don't make much difference since it's such little adjustment allowed. Also the tractor is missing serial plate and the stamped number at rear of engine block is D and 7 digit. (444xxxxx) so I'm guessing it has a replacement D engine?