Thread: Your hull type
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Old 04-25-2012, 01:01 PM   #143
Marin
Scraping Paint
 
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Join Date: Oct 2007
Posts: 13,745
Quote:
Originally Posted by Art;
Did your precautionary engine shut-down last for many hours... to where you felt it necessary to tie off a shaft for trany
Our shaft log is cooled/lubed by water picked off the engine's raw water cooling system. No running engine, no cooling water to the log and it will quickly overheat and severe damage will occur to the shaft and the log. So if an engine needs to be shut down the shaft must be locked before continuing on the other engine.

Shaft logs cooled/lubed by a pick off from the engine's raw water system is not an uncommon arrangement.

So while our BW Velvet Drive transmissions can be freewheeled "at trolling or sailing speeds" as stated in our BW manual we can't freewheel a shaft exxept at extremely low speeds and even then the log and shaft heat up considerably.
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