Velvet transmission

[Dido]

Dear all, my sailboat is equipped with a Ford Lehman 4D254 and a Velvet transmission 10-13-000-003, 2:1 ratio, 1.5 shaft diameter and 19x13 LH 3 blade propeller. When I turn off the engine and start sailing the shaft keep rotating regardless of the position of shifter, forward, reverse or neutral. Is this a sign of defective transmission, if not then are there a device I could install to immobilize the shaft during sailing.

Many thanks for your input.

 

[SoWhat]

Not a problem at typical sailboat speeds. Running on one engine at 10 knots for long periods could result in overheating. The oil pump is not pumping while free wheeling. If engine is not running a PSS seal ay high speeds might need an alterative source of water.