Originally Posted by Denhan
I have recently read in the volva penta manual that with a reversing transmission the propeller should not be left to spin without the engine running. The transmission is similar to a car auto trans and has a oil cooler that operates the same as the engine heat exchanger. With engine not running no cooling and transmission overheats and damage occurs. Now to find a shaft brake.
This may depend on which "manual" you're talking about.
If you're talking about the 28 +- horsepower Volvo engines of recent history (popular sized engines in the 32'-36' boat range), models MD11, 2003, and the later model D1-30 (which I have), all say that the control lever should/shall be in neutral while under sail:
MD11 Owner's Manual (Pg. 19)
2003 Owner's Manual (Pg. 6)
D1-30 Owner's Manual (Pg. 7)