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Old 08-22-2019, 05:01 PM
Cougar694u Cougar694u is offline
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Join Date: Aug 2019
Boat: 1978 S&S 351w
Location: South Texas
Posts: 4
Prop shaft came unbolted...

It didn't end well, but could have been a lot worse. Long story short, idling up to the dock, slipped it into neutral, coasted to dock, slipped it into reverse to stop at the dock and lots of clunking. I shut it off, pull the engine cover and saw the shaft connected with only one bolt and taking on water quickly. Luckily I was with a buddy who could back in a trailer. Tossed him my keys and swam pulling the boat to the ramp, getting it out of the water with probably only minutes to spare.

The bad: it oscillated the shaft, bent it significantly, but also cracked the shaft log.

Strut appears fine, though, and I do plan on replacing the cutlass bearing while the shaft is out, but now I have some questions. It's a 1978 S&S with a 351w and velvet drive. I found several prop shafts, but of varying lengths, and shaft logs of varying angles.

Can someone tell me what the standard length of prop shaft is on these?
What degree is the shaft log?

New here, but been lurking for a while, thanks in advance for any info!

(Including pic with picnic table umbrella, because of course it started raining when I pulled the carb at the beginning of summer).

**EDIT**
Sorry if it's the wrong spot, I wasn't sure if this fell under underwater gear or drive train
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  #2  
Old 08-22-2019, 05:08 PM
waterlogged882 waterlogged882 is offline
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Join Date: Dec 2004
Boat: 93 190
Location: lake
Posts: 12,913
I think that is a 12 deg shaft log but don't quote me on that. I have a contact number and name of a fellow who has some spares in his shop. PM me for that info if you're interested. The ones he has are stock from MC and will fit that application.

Not sure on the 78 shaft length. Measure the old one. I have a used one (1" diameter) in decent shape but the A.R.E. shaft (new) is also an option. Look on DIM's site.

The one I have came out of an 80 model and I bet they are the same. No hard wear marks from packing gland or strut. I'd use it again if necessary. Can get you photos if you're interested. Comes with a coupler. No cost to you except for the ride.

.
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  #3  
Old 08-22-2019, 10:00 PM
tommurtha tommurtha is offline
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Join Date: Jul 2014
Boat: Prostar 197 2003
Location: South Windsor, CT & Richmond Ma
Posts: 942
I have a 77 shaft at the lake, I can measure it over the weekend. My old boat was the last 77 made so it should be the same
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Old 08-23-2019, 05:13 AM
waterlogged882 waterlogged882 is offline
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Boat: 93 190
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Only thing to consider and I may be wrong (but not by much...1 year model) I think the 77 is an 18' boat where the 78 is a 19' boat. The shaft will be a different length. Maybe I am off by a year model where the 76 is 18'.
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Old 08-23-2019, 10:01 AM
EricB EricB is offline
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Join Date: Jul 2004
Boat: 77 S&S, 1983 S&& PS, and now a 98 Anniversary S&S LT1 PS
Location: St. Paul, MN & Balsam Lake, WI
Posts: 772
Quote:
Originally Posted by waterlogged882 View Post
Only thing to consider and I may be wrong (but not by much...1 year model) I think the 77 is an 18' boat where the 78 is a 19' boat. The shaft will be a different length. Maybe I am off by a year model where the 76 is 18'.
1976 was the last year for the 18" boat. 1977 up to 81 are all similar (with the exception of Powerslot). 1982 was a "mix" of different hulls (previous version and new gen).

So if you have parts from a 77 they should fit.
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  #6  
Old 08-23-2019, 10:22 AM
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d2jp d2jp is offline
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Join Date: Jun 2011
Boat: 1992 PS 205-351w,285HO
Location: Central VA
Posts: 990
This forum never ceases to amaze me at the knowledge, willingness to share information and parts/solutions available (many times at no cost). Seriously one of the reasons I purchased a (used) MC, 2 actually was that I felt there wasn't much I'd have to rely on a mechanic to fix.
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Old 08-23-2019, 11:18 AM
Cougar694u Cougar694u is offline
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Join Date: Aug 2019
Boat: 1978 S&S 351w
Location: South Texas
Posts: 4
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Originally Posted by d2jp View Post
This forum never ceases to amaze me at the knowledge, willingness to share information and parts/solutions available (many times at no cost)
This x100. I greatly appreciate all the information and friendliness here, despite only lurking for a few months.
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Old 08-23-2019, 11:48 AM
waterlogged882 waterlogged882 is offline
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Boat: 93 190
Location: lake
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Quote:
Originally Posted by EricB View Post
1976 was the last year for the 18" boat. 1977 up to 81 are all similar (with the exception of Powerslot). 1982 was a "mix" of different hulls (previous version and new gen).

So if you have parts from a 77 they should fit.
Not entirely correct. The 82 was a 19 Skier quite like the 78-86. Nothing mixed about an 82 other than it is mixed in with the year models of the 19 Skier. I have owned them all beginning in 79 (with the exception of the 86 19 Skier) is the only reason I know this.
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Last edited by waterlogged882; 08-23-2019 at 12:51 PM.
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Old 09-03-2019, 10:23 AM
Cougar694u Cougar694u is offline
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Join Date: Aug 2019
Boat: 1978 S&S 351w
Location: South Texas
Posts: 4
Back from work travel and pulled the prop shaft...
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Old 09-03-2019, 11:34 PM
ChadH ChadH is offline
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Join Date: Jul 2017
Boat: 1992 MasterCraft Maristar 240sc 454HO
Location: Northwest
Posts: 40
Ouch. I don't think that one is going to buff out!
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