Max RPMs of a FMD

HTH

I was planning to measure the rpms from the PTO shaft. How this"ll effect to the max rpm setting?

I"m asking this because I have to readjust the rpm range because the set screws were off from the tractor for a while and the previous settings were made with the timing set near to 0 BTDC anyhow. I suspect that this was made to help the starting with hand crank because the starter was broken and not in use for many years.

You can only measure PTO revs at the shaft and this should give 722 rpm @ 1600 rpm. The belt pulley gives 779rpm at 1400 rpm in high gear.

Are you sure the timing is 23 degrees out? I would not think the engine would run this far out. The movement of only one degree either way makes a massive difference to a diesel and how she will run.

When we got the tractor it hadn"t been run for several years. Among a lot of other things we checked the engine timing and at least it seemed to be set only a couple of degrees BTDC. We didn"t check how much it was exactly. It could be that the lines were not exactly aligned when we checked the old setting (we never started the engine with that setting). Anyway we set the engine timing to 26 BTDC (with the lines in proper places) as the manual said. Then we started it and it ran fine but not when the throttle was in idle. We didn"t do anything to it at that time the clutch being stuck and everything. We just wanted to make sure it would run. Now after a couple of years the restoration is in a point when we will be attempting to start it again. Just need to get the outtake manifold from the shop. After that we"ll adjust the rpms.