mpt
Contributing Member
During warm up I noticed the tachometer needle was bouncing around and the starboard engine was starting to idle rough. I noticed there was arcing between the positive Pertronix wire from coil to side of the cast iron engine block half way to the Pertronix in the distributor. There wasn't any sign of bare wire or insulation on the two wires from coil to distributor. I had installed the Pertronix in both twin engines many years ago and have never had any issues! The engines are twin 1981 BB140A's. Does Pertronix wear out over time? I thought there is nothing to wear in a Pertronix system? Could it be a bad distributor cap, rotor, or coil? Probably the crimp splice has developed corrosion in it because I didn't cover it with a heat shrink tube wrap years ago when I installed it! Should I shield the wires? The arcing did not come from area around the crimp splice.