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1978 fish nautique velvet drive questions
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ted50426 View Drop Down
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Joined: June-09-2011
Location: Annapolis
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    Posted: June-09-2011 at 3:48pm
i recently purchased a 1978 fish nautique, rewired everything in the boat rebuilt the steering and fuel system and the boat is awesome. recently i have had some bad transmission leaks. pretty much leaks most of the trans fluid out in about and hour of running. I dont see any leaks on the top or back of the trans. so i assume it is leaking from the front seal (between the motor and the trans) i see that rebuild kits are fairly inexspense. and i have no problem taking it apart and rebuilding it. but i wanted to know which velvet drive it is. are there any markings on the housing i can read? the trans is fairly rusty looking. I hear alot of talk about velvet drive 71c? also how do i figure out the ratio?
Thanks
Ted
1978 Fish Nautique 351 300hp
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8122pbrainard View Drop Down
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Joined: September-14-2006
Location: Three Lakes Wi.
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Points: 41045 		Post Options Post Options   Thanks (0) Thanks(0)   Quote 8122pbrainard Quote  Post ReplyReply Direct Link To This Post Posted: June-09-2011 at 4:17pm
Ted,
We've had several threads on the Velvet Drives leaking via the front seal. Here's a recent one:

Originally posted by 8122pbrainard 8122pbrainard wrote:

Originally posted by Riley Riley wrote:

What should be done on a rebuild?

Bruce,
The clutch pack is the easy one to replace. Almost anyone can do that and this has been proven by some of our members who have been successful. It's when it comes down to the pump when things get more involved and experience like Eric's comes to play. If ALL pump/housing tolerances are not in spec and a couple O rings inside the pump aren't addressed, that's when problems come up. The pump will by pass oil around to it's front side creating pressure where there souldn't be any and push the seal out and or blow oil past it.


We also have a member who's in the business of rebuilding marine trans's. Eric at Fantastic Finish Marine is the guy!! Without any name tag, he'll need some pictures to confirm the trans but most likely it's a 1:1.

Wecome to CCfan. Speaking of pictures, everyone else would love to see the boat too!


54 Atom

77 Tique

64 X55 Dunphy

Keep it original, Pete
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BuffaloBFN View Drop Down
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Joined: June-24-2007
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Points: 6094 		Post Options Post Options   Thanks (0) Thanks(0)   Quote BuffaloBFN Quote  Post ReplyReply Direct Link To This Post Posted: June-09-2011 at 6:32pm
There's usually a tag right next to the dipstick. It may be painted over or long gone. Eric is the man though; my trans literally is a velvet drive after a visit to the gear spa(Eric's shop).

It's probably what you're thinking it is, but check the cooler.
1988 BFN-sold



"It's a Livin' Thing...What a Terrible Thing to Lose" ELO
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eric lavine View Drop Down
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Points: 13413 		Post Options Post Options   Thanks (0) Thanks(0)   Quote eric lavine Quote  Post ReplyReply Direct Link To This Post Posted: June-10-2011 at 10:03am
I took a re-run back to the dealer yesterday, i believe i sold him 500.00 bucks worth of rebuild parts last summer, worked for a minute, took it apart, found .0045 coupling run out, inner forward cylinder o-ring missing, and both planetary bushings spun from mis-alignment, I just hate taking his money again
"the things you own will start to own you"
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