Do you stop the prop when your sailing.

[Steve Dion]

Actually MIT did a study on this.

 

[Blaise]

My source was my multi engine training in the late seventies. I stand corrected. Midnight Sun has a Martec folding prop. If the transmission is left in neutral it will spin the shaft. I put my boat in reverse while sailing.

 

[Benny17441]

The drag induced by a locked propeller is quite significant. This drag would translate to added stress on the transmission gears and thus Yanmar recommends it be allowed to freewheel. The moving gears are well lubricated so the wear and tear is minumum and your boat will gain close to one knot of speed.

 

[Jim Legere]

OK folks, where is the link to this MIT study?

 

[Maine Sail]

OK folks, where is the link to this MIT study?

MIT Prop Study

 

[Jim Legere]

Thanks for the link MaineSail -- a good read.