Even then, without proper insulation you can still get corrosion. I no
longer leave mine plugged in 24/7 (I have Reiff cylinder and oil pad
heaters), because before my recent overhaul my mechanic noted that the front
cams were badly spalled and had sigificant corrosion where the rear ones
looked nearly new. The most likely explanation was the uninsulated prop
acting as a heat sink on the front end of the engine providing for a heavier
condensation density near the front of the engine. Reiff's article does say
to use a cover, but they fail to mention also insulating the prop.

Tom Sixkiller wrote:



Leaving heat on the engine all the time may set you up for condensation
rusting - depends on the details...

Yes...unless you use both a cylinder AND an oil sump heater.

http://www.reiffpreheat.com/FAQ.htm#QA3

--
--Ray Andraka, P.E.
President, the Andraka Consulting Group, Inc.
401/884-7930 Fax 401/884-7950
email
http://www.andraka.com

"They that give up essential liberty to obtain a little
temporary safety deserve neither liberty nor safety."
-Benjamin Franklin, 1759