That's like putting a 60 watt light bulb is a chicken coop. LOL!
It's only max 200watts. Most block heaters are in the 500-1100 watt rage for a cast iron V-8.
Yes it will work but if left over night - from the day before.
350 to 450 watts. Average block heater.
Magnetic oil pan heaters work very well. Even at 200 watts in 20 degree weather it will make a difference. Should try starting a forklift in 0f degree weather. That 60 year old propane job fought me all the way.
