Quoted from boilerman:
before you change them try this:
if the EOS switches are pitted the will effect the power on the high winding. I would pull the eos switch off and use a metal file on them. get the smooth and flat. put them back on and adjust them so the open just a hair when the bat is at full stroke. also take an OHM reading on the high and low winding of each coil. see if that might be an issue too.
I will get you pics tonight
There are three lugs on the coil. Whichbis higj and low?