The point is that the engine and any gears in the transmission are not turning, but the prop shaft will be rotating in the forward direction. So the clutch plate that transmits power to the prop shaft will be turning, with very light pressure between the drive plate and the clutch surface (which, IIRC, on a Kanzaki is a double ended cone?). That leads to glazing of the drive and driven plates, rapid clutch wear, and premature transmission rebuild.
From: CnC-List [mailto:[email protected]] On Behalf Of Gary Russell via CnC-List Sent: Wednesday, June 08, 2016 11:49 AM To: C&C List <[email protected]> Cc: Gary Russell <[email protected]> Subject: Re: Stus-List Kanzaki Transmission in forward or reverse while sailing? How can a transmission in reverse (gears not turning) cause wear? I'm dumb-founded. Gary S/V Kaylarah ~~~~~~~_/)~~~~~~ On Wed, Jun 8, 2016 at 10:17 AM, Joel Aronson via CnC-List <[email protected] <mailto:[email protected]> > wrote: 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." On Wed, Jun 8, 2016 at 10:13 AM, Joel Aronson <[email protected] <mailto:[email protected]> > wrote: Yes, I found the bulletin several years ago. Joel On Wed, Jun 8, 2016 at 10:08 AM, Hoyt, Mike via CnC-List <[email protected] <mailto:[email protected]> > wrote: Can anybody verify this? We have a Kanzaki KM3P transmission on our Yanmar 3GM30F. We always have in reverse while sailing. It would be very good to know if this is a roblem! Mike From: CnC-List [mailto:[email protected] <mailto:[email protected]> ] On Behalf Of Paul Baker via CnC-List Sent: Wednesday, June 08, 2016 11:05 AM To: [email protected] <mailto:[email protected]> Cc: Paul Baker Subject: Re: Stus-List Transmission in forward or reverse while sailing? It depends on your transmission and engine. Yanmar had a bulletin a while back for their engines with Kanzaki transmissions stating that they should always be in neutral when sailing. Damage or wear to the transmission would occur otherwise. Cheers, Paul. > Date: Wed, 8 Jun 2016 06:36:50 -0400 > To: [email protected] <mailto:[email protected]> > Subject: Stus-List Transmission in forward or reverse while sailing? > From: [email protected] <mailto:[email protected]> > CC: [email protected] <mailto:[email protected]> > > Which gear is recommended (forward or reverse) while sailing? When the > transmission is in forward I can feel the shaft turning while sailing. When > it is in reverse I don't feel it. Which is preferred? > > Sent from my iPad > _______________________________________________ > > This list is supported by the generous donations of our members. If you like > what we do, please help us pay for our costs by donating. All Contributions > are greatly appreciated! _______________________________________________ This list is supported by the generous donations of our members. If you like what we do, please help us pay for our costs by donating. All Contributions are greatly appreciated! -- Joel 301 541 8551 <tel:301%20541%208551> -- Joel 301 541 8551 <tel:301%20541%208551> _______________________________________________ This list is supported by the generous donations of our members. If you like what we do, please help us pay for our costs by donating. All Contributions are greatly appreciated!
_______________________________________________ This list is supported by the generous donations of our members. If you like what we do, please help us pay for our costs by donating. All Contributions are greatly appreciated!
