timing marks A Farmall

Gary Spear · Oct 11, 2009

Hello again,,,I was wondering how and if the cam gear/ignition gear are marked. My cam gear has a one punch mark in one place and a two punch marks in another,The ignition gear has only a two punch mark.How do I know when they are correctly aligned? When the no 1 piston is up and firing, the two marks on the cam gear are visible , not under the cover, that is and aimed somewhat at the ignition gear shaft, not perfectly centered,but in that direction,,And I have a spare gov./ignition gear assembly,,In the older one 1942 or so,,,the spring[in the center of the shaft and connected to the plunger] is longer than the 1947,will either work? The longer one is in better shape and I would like to use it...Woul d I need to use the weights from it also,,,Again any reply is very appreciated ,GB

ScottyHOMeY · Oct 11, 2009

The way that motor is timed up, the single punch mark aligns with a single mark on the gear at the front of the crankshaft. The double mark is for your governor and ignition drive gear. IIRC the mark is aligned with a notch on the cam gear, and the mark on on the gov/dist gear is on a tooth. Even if it's the other way around, the marked tooth and notch should mesh when the motor is at TDC on 1 and 4. It's possible that you're a tooth off on the bottom, but I'd consider that last. More likely you're close but not exactly at TDC on the crank.

According to the parts book, there was a change made in '45 to the governor shaft bumper spring and the pin at the front end of it. They then offered a single, separate kit of both spring AND pin that could be used to replace either. If you swap the longer spring in, I'd swap the pin as well. If your existing weights are good, there's no need to change them out.

timing marks A Farmall

Gary Spear

New User

ScottyHOMeY

Well-known Member

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