Just went out to plug my tractor in and had a look at where the cords run. I've got one in the block and a heat pad on the outside of the oil pan. Explains why it fires right up after being plugged in for an hour. I had a similar setup on my 84' jeep cj10a with the addition of a battery heater, worked great but I had to use a 10ga. Extension cord and 20a outlet.
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