Originally Posted by Dan Stokes

I think I said this before but it bears repeating: do NOT use a Ford starter solenoid, use the one that looks like it but is rated for continuous usage. The most common application is for snow plow actuators but a decent parts store should have them. They're used on all sorts of industrial stuff from wheelchair lifts to hydraulic booms on service trucks - not hard to find. The actual starter ones are only meant for short bursts of use (I've heard 15 seconds but I don't know if that's accurate). That doesn't mean that if you engage it for 16 seconds it'll melt but the solution is just a couple of $$ more and all you have to do is remember to ask for it. I've had mine on Mutt from the first start up and it works perfectly and every time. There have been times that I engaged it for fairly long periods on initial start up following draining the fuel system and no problems even then.

Other than that the above diagram looks great to me!

Dan