If I remember correct the 140 tractors used a lot lower total advance than a A. Original A and M tractors were the same.
I mess with bigger tractors the most, total advance does make a difference if you drop a plow in the ground and pull at or near maximin load all day and using the recomended fuel. Especially with higher compression pistons than original. Going to find pistons with tops eroded or the top edges eroded down to the ring grove.
Everybody does things different so I don't say much when I see the posts about setting the time by ear. I wonder what there doing with the tractor though. Especialy the 100 series up bigger tractors will sound like the time is retarded if set to specs.
Saw enough piston damage on them when worked hard to know what happens.
Toms post made me think of something else. IH furnished parts to change the advance on some mag equiped tractors when installing firecrater pistons.
This post was edited by D Slater at 10:48:36 11/05/12.
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