Hello all,
I've finally finished off rebuilding the engine in my Farmall M. It's running again for the first time in about 15 years.
Now, my question is this: I've got 4" overbore stepped head pistons. The original pistons were 3 7/8" flat top and the tractor has the original kerosene head on it still. My understanding is that the impulse coupling should be giving around 35 degrees of advance, but that other impulse couplings were available for use with the high compression pistons. Is there anywhere that a fellow could still find these? The tractor runs good, but it just isn't as smooth as I would like it. I've got the valves set correctly and the timing is also correct, so I'm pretty certain that what I'm dealing with is the advance.
If anybody could help out locating these parts that would be fantastic.
Thanks very much!
I've finally finished off rebuilding the engine in my Farmall M. It's running again for the first time in about 15 years.
Now, my question is this: I've got 4" overbore stepped head pistons. The original pistons were 3 7/8" flat top and the tractor has the original kerosene head on it still. My understanding is that the impulse coupling should be giving around 35 degrees of advance, but that other impulse couplings were available for use with the high compression pistons. Is there anywhere that a fellow could still find these? The tractor runs good, but it just isn't as smooth as I would like it. I've got the valves set correctly and the timing is also correct, so I'm pretty certain that what I'm dealing with is the advance.
If anybody could help out locating these parts that would be fantastic.
Thanks very much!