On H4 magnetos, why do some impluse drive members have square lugs and others round? Is there a difference between the two? Is a round-lugged one stamped "R" the same as a square lugged one without a stamp? and is there any reason it should not work on a Farmall A/B?
I"ve got one (round-lug) that I put on a B and it timed correctly when mounted, but engine ran ROUGH!!!!! Put another (square-lug) on and it ran smooth. Of course, there might be something else going on, but the difference in impluse couplings caught my eye.
Thanks in advance for the expert advise.
I"ve got one (round-lug) that I put on a B and it timed correctly when mounted, but engine ran ROUGH!!!!! Put another (square-lug) on and it ran smooth. Of course, there might be something else going on, but the difference in impluse couplings caught my eye.
Thanks in advance for the expert advise.
