Growing up in Maine my family just plugged in a 60 watt light bulb under the engine and threw a blanket on top
In WWII the Russians operated aircraft and other machinery in insane cold temps. It's hard to bring a fighter plane inside and heat it up when you're at the front, so they didn't bother. They had steel spinners with couplers in them, and a 50hp engine mounted on a truck, with a driveshaft to the spinner. 50 below? No problem! Just crank that sucker up until it catches!How about one of those 110V plug in starter motors, crank it 'til it starts. :dunno: