Reply
 
Thread Tools Display Modes
 
Old 09-03-2015, 08:14 AM   #1
Veteran Member
 
City: Portsmouth
Country: USA
Vessel Name: TWILIGHT TIME
Vessel Model: SENATOR SUNDECK
Join Date: Jun 2009
Posts: 29
Transmission replacement

I currently have a 71c 10-17 velvet drive 2.1:1 transmission behind a perkins 6-354.

Unfortunatley the tranny is shot. There was a driver saver between the shaft and transmissiont that was shreaded,cause unknown but suspect hitting a submerged object. The trans has been destroyed also. Looking at alternatives, possibily replacing with a 72c same ratio, or sourcing another 71c. Anyone have any suggestions or experience with this set up?
__________________
Advertisement

Twilight time is offline   Reply With Quote
Old 09-03-2015, 08:53 AM   #2
Guru
 
Forkliftt's Avatar
 
City: Biloxi Mississippi
Country: USA
Vessel Name: Patricia Louise II
Vessel Model: 1983 42' Present Sundeck
Join Date: Oct 2007
Posts: 2,433
Destroyed as in case/ shaft damage?? These aren't nearly as available as one for a Chevy truck- so repair might be a better option??


Forky
1983 Present 42 Sundeck
Twin Lehman 135's
✌️
__________________

__________________
Steve Point Cadet/ Biloxi, Mississippi USA
*Present 42 twin 135 Lehmans
Forkliftt is offline   Reply With Quote
Old 09-03-2015, 09:21 AM   #3
Guru
 
siestakey's Avatar
 
City: Sarasota,FL/Thomasville,GA
Country: USA
Vessel Name: Steppin Stone IV
Vessel Model: Marine Trader Kelly Trawler 46
Join Date: Jul 2013
Posts: 1,271
Send a message via Skype™ to siestakey
Do not see one with the same ratio but ebay has several rebuilt and used


velvet drive marine transmission | eBay
__________________
Alan
Skype roatan63
siestakey is offline   Reply With Quote
Old 09-04-2015, 09:59 AM   #4
Senior Member
 
City: Anacortes
Country: USA
Join Date: Nov 2012
Posts: 301
The 71c is a very basic, well travelled machine. Behind the typical power of a Perkins 354, they typically last a long time. Yes, there are stronger transmissions out there, but if it were me on my own boat, I'd just replace like with like.

You can get an excellent rebuilds of this unit.
ghost is offline   Reply With Quote
Old 09-04-2015, 09:31 PM   #5
Senior Member
 
Datenight's Avatar
 
City: Noank, CT
Country: USA
Vessel Name: Datenight
Join Date: Jan 2008
Posts: 415
Twlight,

When the Velvet drive went in the old boat I took it to a local transmission shop. Complete rebuild for $750.00 in 2011. I did the removal and installation.

Rob
__________________
North Pacific 39
Datenight is offline   Reply With Quote
Old 09-05-2015, 12:17 AM   #6
Guru
 
Nomad Willy's Avatar
 
City: Concrete Washington State
Country: USA
Vessel Name: Willy
Vessel Model: Willard Nomad 30'
Join Date: Oct 2007
Posts: 13,726
Stay w the BW and you probably won't need to raise your engine 2 to 4".
__________________
Eric

North Western Washington State USA
Nomad Willy is online now   Reply With Quote
Old 09-09-2015, 11:17 PM   #7
Guru
 
JDCAVE's Avatar
 
City: Lions Bay, BC
Country: Canada
Vessel Name: Phoenix Hunter
Vessel Model: Kadey Krogen 42 (1985)
Join Date: Apr 2011
Posts: 1,614
Transmission replacement

If money was no object...Twindisc.


Jim
Sent from my iPad using Trawler Forum
JDCAVE is offline   Reply With Quote
Old 09-16-2015, 12:22 AM   #8
Senior Member
 
City: Anacortes
Country: USA
Join Date: Nov 2012
Posts: 301
Pretty sure the twin disc would have a different down angle than the 71c. Nothing like changing motor mounts and everything else to get 30 years out of the next build instead of 25.
ghost is offline   Reply With Quote
Old 09-16-2015, 03:21 AM   #9
Senior Member
 
kapnd's Avatar
 
City: hawaii
Country: usa
Vessel Name: #31
Vessel Model: ex-Navy MUB 50 fish/cruise
Join Date: Aug 2013
Posts: 293
If the dimensions will work, the 72 is a way beefier trans.
If you hit something solid enough to wreck the drivesaver, you would know it, and your prop would be a pretzel. The drivesaver is intended to protect your tranny from such trauma.
Things like poor alignment, or bolts falling out of the coupling can wreck a drivesaver. The transmission failure may have occurred later, after the seals gave up and all the oil leaked out.
__________________

kapnd is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





All times are GMT -5. The time now is 03:38 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012