It is permissable to allow
the propeller to auto-rotate when sailing
it will not damage the gearbox, it will obviously
add to the wear of rotating parts. It may also be
DO NOT STOP THE PROP
ROTATING BY SWITCHING OFF THE ENGINE WITH THE
GEARBOX IN GEAR.
Doing so may result in the gearbox locking
in gear, and require the box to be dismantled to
free the lock.
You should ALWAYS select neutral before
stopping the engine.
(Gear selection with the engine stopped
will do nothing, as the box needs oil pressure to
If by chance you forget to do this, select
neutral and restart the engine at once. (Make
sure you are well moored first as the boat will
move in the direction last selected.)