[ndutton]

Bill, pay close attention to your ignition circuit voltage drop. You are adding 6.6 amps (new pump) to it for a total of over 2½ times what the engine's ignition requires. Once installed measure your coil input voltage and divide it by your alternator output voltage at cruising RPM. If the quotient is anything less than 0.97 you should increase the entire ignition circuit to a larger gauge wire.

With my 2 Johnson pumps (4.4A combined), 3.3 amps for the ignition and a Hella-long run from midships to the control panel at the stern and back I'm running 10 gauge wire to mitigate the loss.