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Old 10-23-2019, 06:48 AM   #18
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Join Date: Oct 2007
Posts: 19,837
"I'm considering a system like this for my dual 1988 Volvo TAMD 61A engines which tend to be a bit on the smokey side when starting, and take a long while to warm up."

A block heater helps with cold starts , if the engine is hard to get firing in below freezing weather.
For DD below 40F can sometimes be difficult on older engines.

Smoke from incomplete combustion is simply the sign of a cool engine.

The best, fastest and correct way to warm the engine is to get underway at a very modest engine load , and increase the load as the engine warms.

30 seconds to 60 seconds is all the idle time needed before casting off

WE run about 1,000 RPM till the water temps get to about 120F then increase throttle to continue the warm up.
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