Velvet Drive Prop Rotation
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Boat Maintenance
Forum Discription: Discuss maintenance of your Correct Craft
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=2833
Printed Date: January-16-2025 at 6:05am
Topic: Velvet Drive Prop Rotation
Posted By: rmcdonald
Subject: Velvet Drive Prop Rotation
Date Posted: December-31-2005 at 12:07am
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Hi All
I have a 1968 Ski Nautique which I have just completed a 5 year restoration on. Stats Engine Chrysler 383 V8 Gear box: Velvet Drive AS11-72C with a R stamped below near Warner Gear Div. My problem: Boat only goes in forward direction when Reverse is selected. I have read the borg Warner Manuels and it seems so far that I have the wrong direction prop. Can anyone out there with a Chrysler 383 with AS11-72CR borg warner gearbox tell me the following things What Direction does your fly wheel spin, when viewing it from the back of the motor CW clock wise CCW counter clockwise When you engage the gearbox in Forward does the shaft spin in the same direction as the fly wheel. What Direction is you prop. Left hand or Right viewed from the rear of the boat. Any help is much apreciated. |
Replies:
Posted By: 79nautique
Date Posted: December-31-2005 at 6:15am
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I would say that you have the pump reversed in the tranny and that it should be a reverse rotation engine with a right hand prop. The transmission can rotate in either direction depending which way the pump is instaled ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=756&sort=&pagenum=1&yrstart=1979&yrend=1979 - 79 nautique |
Posted By: Bob's2001
Date Posted: December-31-2005 at 1:33pm
I agree with 79. I just finished a rebuild on my Velvet Drive and there are arrows on the pump to indicate rotation. You can see the arrows on the bottom left and top right in the picture. Mine is RH. Put the arrow that corresponds to your rotation at the top.
 ------------- Bob Ed 83 2001 |
Posted By: rmcdonald
Date Posted: December-31-2005 at 8:57pm
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Hi Chris & Bob
Thanks for the replies. I was hoping that you were going to say that. I was unsure if that would work as I read in the Manuel that changing the pump rotation does not influence the output shaft direction. I had the gear box rebuilt prior to install. The guy who did the rebuild did not check with me the engine rotation so I am hoping that that is all that is wrong. |
Posted By: 79nautique
Date Posted: December-31-2005 at 11:51pm
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G ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=756&sort=&pagenum=1&yrstart=1979&yrend=1979 - 79 nautique |
Posted By: KENO
Date Posted: January-13-2006 at 1:50am
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Hi rmcdonald
I hate to tell you this, but if your pump is oriented wrong your transmission won't turn with the engine. You can't change the direction of prop rotation by changing the pump orientation.In other words you can't make a RH rotation engine turn the prop in the LH direction. If the prop turns then the pump is oriented right and your prop is wrong. Do a search on here for a post t*tled "BW velvet drive installed backwards" and you'll see some info. I'm much more familiar with a 71C but this also pertains to a 72C. Some transmissions can change the direction of rotation but not a 71C or 72C that has a 1:1 ratio. Keno |