Advice on new starter for Mark 3 ?

Ron L said:

I don't think I understand this. You are using 4 brushes but only two field coils? Do you have two brushes connected to the field coil and two grounded to the case? How does this improve the motor?

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Ron,

Two opposing brushes connect to the terminal post, and the other two brushes to the field coil connection.



Here are the instructions that came with the kit:

I had never heard of adding the two extra brushes without adding the two additional field coils. I have always converted to a four pole/four field starter.

Can someone explain to me the theory of why this is an improvement over the two brush motor?

I admit to being electrically challenged sometimes.