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Old 04-25-2013, 10:33 AM
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Wouter Wouter is offline
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Join Date: Jan 2007
Boat: Mastercraft Prostar 190, 1990, Indmar Ford 351w GT40P, Borg Warner 1/1 Velvet drive 71c 10-17-004, pp stargazer, Acme 13
Location: Belgium
Posts: 257
As mentioned in my other thread :
http://www.mastercraft.com/teamtalk/...ad.php?t=53645

After changing the ATF fuid of my velvet drive 71c (model 10-17-004) (which had probably never been changed) the transmission started slipping severely. I decided, it was time for a rebuild, so here goes the write-up:

Tools/fluids/parts you’ll need:
- Dexron III ATF oil (preferably mineral)
- WD40 / engine cleaner
- Rebuild kit (includes forward and reverse clutch plates, seals and gaskets) http://bpi.ebasicpower.com/p/ALT23901
- Complete snap ring set or at least front bearing snap ring:
http://bpi.ebasicpower.com/p/ALT23255
- Possibly a new damper plate:
http://bpi.ebasicpower.com/p/ALTDA-106A/
(All these parts are also available elsewhere (i.e. skidim.) I have no affiliation with ebasic.
- An arbor press (mainly to compress the clutch pack)
- Snap ring pliers
- Rubber mallet (came in very handy)
- The usual assortment of torque wrench(es), socket (hex but also at least one 3/8" 12 points socket), etc.
- One big (38mm) 1-1/2” hex socket
- A feeler gauge 0.018" to 0.055" (to set clutch clearance)
- Shop or service manuals:
http://www.mastercraft.com/teamtalk/...ad.php?t=32581
different manual attached to this post. look below transmission tag.

Important things to remember:
This thread does not cover reduction ratios.
Stage the parts in order as you are pulling them out to remember how they go back in.
If you can, take pictures as you go in case you forget how/when a particular part came out.
Make sure to note position of pump housing (this is particular to your engine’s rotation direction.)
Read service manual and thread completely before starting
Attached Images
 
Attached Images
File Type: pdf BW71C_72C_reduced2.pdf (1.64 MB, 558 views)
File Type: pdf Borg-Warner-Velvet-Drive-71C-72C-Transmission-Owners-Manual_red.pdf (1.49 MB, 835 views)
File Type: pdf 16A8R2.pdf (187.8 KB, 494 views)

Last edited by Wouter; 04-29-2013 at 04:43 AM.
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  #2  
Old 04-25-2013, 10:46 AM
Wouter's Avatar
Wouter Wouter is offline
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Join Date: Jan 2007
Boat: Mastercraft Prostar 190, 1990, Indmar Ford 351w GT40P, Borg Warner 1/1 Velvet drive 71c 10-17-004, pp stargazer, Acme 13
Location: Belgium
Posts: 257
Bellow is a diagram of the velvet drive: I'll use the diagram part numbers for the rest of the thread:
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  #3  
Old 04-25-2013, 10:47 AM
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Wouter Wouter is offline
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Join Date: Jan 2007
Boat: Mastercraft Prostar 190, 1990, Indmar Ford 351w GT40P, Borg Warner 1/1 Velvet drive 71c 10-17-004, pp stargazer, Acme 13
Location: Belgium
Posts: 257
remove transmission from boat and note position of pump housing.
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Old 04-25-2013, 10:50 AM
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Wouter Wouter is offline
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Join Date: Jan 2007
Boat: Mastercraft Prostar 190, 1990, Indmar Ford 351w GT40P, Borg Warner 1/1 Velvet drive 71c 10-17-004, pp stargazer, Acme 13
Location: Belgium
Posts: 257
remove pump housing 104
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  #5  
Old 04-25-2013, 10:55 AM
Wouter's Avatar
Wouter Wouter is offline
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Join Date: Jan 2007
Boat: Mastercraft Prostar 190, 1990, Indmar Ford 351w GT40P, Borg Warner 1/1 Velvet drive 71c 10-17-004, pp stargazer, Acme 13
Location: Belgium
Posts: 257
remove pump drive gear 101 (slides off)
remove woordruff key 65 from drive gear assembly 64
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  #6  
Old 04-25-2013, 11:00 AM
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Wouter Wouter is offline
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Join Date: Jan 2007
Boat: Mastercraft Prostar 190, 1990, Indmar Ford 351w GT40P, Borg Warner 1/1 Velvet drive 71c 10-17-004, pp stargazer, Acme 13
Location: Belgium
Posts: 257
remove 99 (12 points (10mm) 3/8" socket necessary)
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Old 04-25-2013, 04:02 PM
catamount catamount is offline
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Join Date: Feb 2012
Boat: 1987 ProStar 190
Location: Vermont
Posts: 415
I may need this thread in the future, so I just wanted to say thank you!
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Old 04-25-2013, 06:56 PM
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CantRepeat CantRepeat is online now
 
Join Date: Jul 2008
Boat: 06 X30
Location: Roll Tide!!
Posts: 8,367
Great thread! This site has needed this for a long long time. It will show people that rebuilding these velvets are within the grasp of the normal shade tree.

Once you post up the reassembly this should be cleaned up and added to the FAQ for sure. Once all the photos and such from the reassemble we can all add our 2˘ and links to tech manuals and what not.
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  #9  
Old 04-26-2013, 08:05 AM
Wouter's Avatar
Wouter Wouter is offline
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Join Date: Jan 2007
Boat: Mastercraft Prostar 190, 1990, Indmar Ford 351w GT40P, Borg Warner 1/1 Velvet drive 71c 10-17-004, pp stargazer, Acme 13
Location: Belgium
Posts: 257
Next step will be to repair small leaks in muffler with fiberglass and puting muffler and tranny back in the boat. I don't think I will replace the damper plate in the end: it looked good as is on first inspection.

Last edited by Wouter; 04-26-2013 at 09:36 AM.
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  #10  
Old 04-26-2013, 08:38 AM
bstewart0529 bstewart0529 is online now
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Join Date: Oct 2012
Boat: 1991 prostar 190
Location: southeast
Posts: 73
I can not say thank you enough. this will be helpful in the future for me i am sure. thanks for taking the time this was fantastic.
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