Hi Wally,
I bought a heater for my wifes car when it was having trouble starting in the winter that you leave in place. I never installed it because we found out that the coil was bad and when we replaced that, it started fine. This one installs on the heater hoses and when plugged in, circulates the water in the raidator and block to keep things warm. I have been going to install it on my tractor as the heater hoses are just looped to keep the heater from leaking, but havent gotten around to it. Could use it today as its 6 degrees here today without the wind chill. Hope that helps. My 48 3/4 ton always starts, so I dont mess with it
Ralph
