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Old 06-08-2020, 02:02 PM   #21
City: Newport Beach
Vessel Name: Open Gate II
Vessel Model: Ocean Alexander 423 Classico
Join Date: Sep 2015
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My mechanic suggested having a large pipe wrench to isolate prop spin if i ever needing towing. Just need to know which way the shaft rotates and darn sure to remove it before starting.
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Old 06-08-2020, 06:16 PM   #22
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City: Pensacola
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Vessel Model: C Dory 25, pilot house trailerable cruiser
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I have a lot of experience with "spinning props" having done extensive passage making in sailboats, with trawler sized engines. The velvet drives tolerate freewheeling. Some boats have different transmission on counter rotation prop--and that can make a difference in resistance to free wheeling.

I have used "Chain Vise Grips" to stop trawler sized props (actually stop the spinning and then put the Vise Grips on the shaft.). These are less likely to score the shaft. You can use rubber gaket material under the chain vise grips to further protect from maring.

Be sure that your transmissions and packing gland cooling can tolerate freewheeling--if not, then you should stop the spinning. As I remember that Allison and ZF transmissions should not be allowed to freewheel.
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Old 06-08-2020, 07:13 PM   #23
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City: Kenai, Alaska
Vessel Name: Melanie Rose
Vessel Model: 1999 Willard PH
Join Date: Feb 2013
Posts: 1,011
It amazes me that a sailboat would intentionally induce drag. I thought that was the reason for self feathering props?
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Old 06-09-2020, 05:31 PM   #24
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Vessel Model: Marine Trader
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My guess would be that additional gearing for counter rotation might prevent one prop from freewheeling.
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