75HP Evinrude
#7237303
04/07/21 01:20 PM
04/07/21 01:20 PM
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Joined: May 2010
Posts: 670 ND
DakotaBoy
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Hey all, I had a learning moment a couple of years back when I bought my first boat. Used the motor tilt tabs for trailering instead of a transom saver, and broke one of the legs off and screwed up the swivel bracket. The motor is a 1979 Evinrude 75HP, model 75943R, Serial No. J0001976. I believe the swivel bracket needed is a 15", but I know a 20" was also made. Two questions: Where exactly do I measure to see if I've got the 15" or the 20" part? I believe what I've got is a short-shaft, so I'm thinking I'll need the 15"? Does anyone happen to have an outboard bone-yard that might have one of these swivel mounts they're looking to get rid of?
"Pretty cocky for a starving pilgrim!" "An elk don't know how many legs a horse has!"
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Re: 75HP Evinrude
[Re: DakotaBoy]
#7237397
04/07/21 04:37 PM
04/07/21 04:37 PM
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Joined: Feb 2007
Posts: 5,436 New York border
Cragar
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Easy way to measure for short shaft (15") vs long shaft (20") is to measure the boat transom size. From the looks in your picture it looks like your transom is 15".
They also make an extra long shaft for sailboats which I believe is 26"
Scuba , correct me if I'm wrong , but I think I got it right.
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Re: 75HP Evinrude
[Re: DakotaBoy]
#7237509
04/07/21 06:49 PM
04/07/21 06:49 PM
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Joined: Sep 2010
Posts: 2,786 Northern lower Michigan
Feedinggrounds
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Google, Valley Sales, Houghton Lake Michigan. Guy has old school bus's full of boat motors hanging on the seats....He is loaded with old snowmobile parts also.
you're only allowed so many sunrises... I aim to see every one of them!
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Re: 75HP Evinrude
[Re: DakotaBoy]
#7238110
04/08/21 11:03 AM
04/08/21 11:03 AM
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Joined: May 2010
Posts: 670 ND
DakotaBoy
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Last edited by DakotaBoy; 04/08/21 11:04 AM.
"Pretty cocky for a starving pilgrim!" "An elk don't know how many legs a horse has!"
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Re: 75HP Evinrude
[Re: BernieB.]
#7241373
04/12/21 10:07 AM
04/12/21 10:07 AM
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Joined: May 2010
Posts: 670 ND
DakotaBoy
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The cavitation plate just above the prop should be about level with the bottom of the boat. You'll have to put the motor down to see. If it has another cavitation plate about 5 inches above the bottom one, it's a 20. Bernie, what is a cavitation plate? I'm guessing it's the plate above the prop (red arrow)? Is the blue arrow showing a second cavitation plate?
"Pretty cocky for a starving pilgrim!" "An elk don't know how many legs a horse has!"
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Re: 75HP Evinrude
[Re: Trapset]
#7241413
04/12/21 11:07 AM
04/12/21 11:07 AM
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Joined: May 2010
Posts: 670 ND
DakotaBoy
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If you post a pic of the ID plate I can find out what length it is for ya. The mount you need should be the same on both length shafts though. 1979 Evinrude 75HP, model 75943R, Serial No. J0001976 Unless I'm looking in the wrong spot on iBoat, it doesn't directly identify if it's a long or short shaft.
Last edited by DakotaBoy; 04/12/21 11:08 AM.
"Pretty cocky for a starving pilgrim!" "An elk don't know how many legs a horse has!"
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