Block heater

Block heaters do help a lot even in warmer temperatures. We had a twin Detroit 6/71 38' boat parked at a Los Angeles marina. There was nothing wrong with the the fuel system but the cold start up at any temp was pretty nasty. The restaurant which was located at the end of our access dock finally complained enough that the marina contacted us about cleaning up the starting or moving the boat to a different slip. Giving up a prime slip was out of the question. The installation of block heaters, used even in 70 degree weather, made all the difference in the world. We were even offered free Sunday brunches by the restaurant for cooperating. Block heaters will help lessen cylinder wall wash and dirty start up even at warmer temps.
Randy
p.s. Slip fees included electricity so the heaters were a no brainer.