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post #5 of Old 05-26-2014
Maine Sail
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Re: Sailing ... transmission in reverse?

Originally Posted by gamayun View Post
The spinning prop will drive you crazy. I put it in reverse while sailing, then put the boat in irons to slow it down and get it into to neutral before I crank the engine. It slides right in if there's no pressure. I think the problem comes when trying to force it out of gear. I have a Yanmar 3GM30. Anyway, as you'll see,the advice on this seems to be all over board....
The problem comes because water movement over the prop wears the cones over time and eventually causes slipping of the gear necessitating a rebuild. Yanmar had so many issues they issues an MSA on the topic to all dealers. Folks have also broken gear linkages etc..

Yanmar MSA - Gear Position While Sailing

Advisory Number: MSA08-003:

DATE February 8, 2008 Dealers and OEMs
TO: All Marine Distributors
SUBJECT: Gear in Neutral While Sailing All MODELS:

All Sailboat Engines

We continue to get questions regarding the correct gear position while sailing with the engine OFF. This advisory is issued as a reminder; Yanmar requires that if sailing with the engine OFF (not running) the transmission shifter must be in the neutral position or internal damage to the gear or sail-drive will result. This damage will not be covered by Yanmar’s Limited Warranty. Please instruct customers and dealers who deliver the sailboat to the customer, of the correct (Neutral) position for the marine gear while sailing.

If the customer desires that the propeller shaft not spin while sailing, either a folding propeller, shaft break, or other suitable device may be used. However, Yanmar accepts no responsibility for the selection, installation, or operation of such devices. Please also refer to Marine service advisory “MSA07-001_Yanmar Sail Drive Propeller Selection” for additional information.

If you have any questions regarding this advisory please contact a Customer Support representative.

-Maine Sail / CS-36T

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