Sorry for the off Speedster etc. request but I need to source a high quality continuous duty 12v solenoid for " off road use" . Anything from Napa, Carquest or other noted brands ? thanks.
David, assuming you mean the 'solenoid' that's actually a heavy duty relay (and not the thing that extends an actuator rod), Cole Hersee has a pretty good reputation.
I put one on the glow-plug circuit of a marine diesel engine about 10 years ago and it's still working OK. I got mine at West Marine and now see they're no longer carrying them.
But, here it is on (surprise) Amazon for less than I paid ten years ago.
Just spec conservatively. This one is rated at 65 amps, but I wouldn't run more than 30 through it, continuous duty.