Output shaft nut size

Engines, Shafts, Steering, Struts, Rudders, etc.
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ericinga
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Location: Cumming, GA

Output shaft nut size

Post by ericinga »

Anyone know the output shaft nut size on a velvet drive 71C?

The port trans is clunking. Hoping it is either the output shaft nut or coupling.

Eric
Eric Spies
1989 32 SDFB
Twin 318s
Lake Lanier, GA
Marinette Boat
EWRice
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Re: Output shaft nut size

Post by EWRice »

Depends on weather the Trans is 1:1 or reduction. Then I think they used to different coupler sizes on the gear reduction models that changed the nut size.

Is it clunking at idle or at any speed?
Muskegon Lake
1972 32' Express flybridge
"AL13"
Twin 318s
On board air & prime 920
1963 Thompson Super Sea Lancer
Graymarine 327
1961 Alumacraft 12'
'55 10hp Johnson
ericinga
Aluminum Star
Posts: 170
Joined: Mon Jul 14, 2014 11:21 am
Location: Cumming, GA

Re: Output shaft nut size

Post by ericinga »

It only clunks going into gear. 1:1 reduction. I found a service manual showing 1.5" nut.
Eric Spies
1989 32 SDFB
Twin 318s
Lake Lanier, GA
Marinette Boat
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