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Old 06-07-2011, 03:24 AM   #34
FF
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Join Date: Oct 2007
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RE: Running single on a twin to save fuel

white vapor at the tail pipe (over fueling)

White smoke is underloading or poor compression or low cylinder temps.

BLACK smoke is too much fuel.

The trailing prop is a big drag , one cure is power feathering. A small 1 hp or so electric or hyd motor is installed to spin the prop, but not push the boat.

This will allow centered ahead rudders , and no prop drag.

Alternators and DC motors are not efficient,, but way better than a dragging prop.
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