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Old 10-09-2015, 12:58 AM   #1
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Propeller shaft.

I was wondering about reducing the shaft size of a propeller. I have a 1 3/4" shaft. I have Acquired another prop. But it's for a 2" shaft. Any sort of cup where I can use to make this year that my inch and three-quarter shaft?
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Old 10-09-2015, 01:18 AM   #2
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I believe the taper could be built up and then remachined to fit the smaller shaft. Ask a prop shop.
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Old 10-09-2015, 06:54 AM   #3
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Greetings,
Mr. SD. Hey, how's it goin' eh? How about this...? anchor bushings, propeller bushings, nylon propeller bushings
Just a quick Google for "marine propeller sleeve" brought this up. I'm sure there are sizes that will suit your purpose. Here's another... http://www.johnnys-propeller.com/ind...ndex&cPath=1_2
Stay well my friend.
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Old 10-09-2015, 07:05 AM   #4
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As RT mentioned you can use a nylon propeller bushing. On my old steel boat I had that setup. It work fine with the old Grey Marine 6-71 which only produced 168 HP. In reality I was probably only pushing 50 or 60 HP through it. Wouldn't be my choice if you were using hundreds of HP.

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Old 10-09-2015, 10:00 AM   #5
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I am skeptical that a sleeve could be used to shim a prop. Torque is transmitted through the taper not the key so a shim may not work.


This is reaaly a question for a good prop shop.
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Old 10-09-2015, 11:31 AM   #6
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I've used nylon sleeves and they do work. Not the preferred way to do things, but ok, especially if prop/shaft is not highly loaded. May need to recheck prop nut torque a few times.
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Old 10-10-2015, 09:04 PM   #7
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Well I bought my shaft and I'll try to post a few pictures getting the Cutlass bearing out was quite a challenge I had to use a saws all and cut through the rubber and the brass sleeve but not into the rest of the boat managed to pry it out with several chisels and lots of bump knuckles. First problem was the set screws wouldn't come out they just sort of crumbled I don't know what kind was in there but I don't want to use them again. I had the shaft straightened and Click image for larger version

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ID:	45372this is the new rear Cutlass bearing installedClick image for larger version

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ID:	45374this is my shaft and propellerClick image for larger version

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ID:	45376all the teardowns done from here on out just rebuilding everything putting it all back together another one. I had the new split coupling faced. To the shaft. And it's raining and blowing 40 kn
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Old 10-10-2015, 09:14 PM   #8
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Learned a lot doing this turns out my propeller which was stamped 18 was actually pitched at something like 20.5 also my propeller has electrolysis and I am in need of replacement which was why I asked about the sleeveI.
If a prop has electrolysis I'm told that it doesn't hold patch very. I'm wondering if the change is positive or negative as my prop is stamped 18 and the pictures turned out to be 20.

Shop foreman told me that at the time my prop was in there he had a different man a new guy and he only checked one out of five.

He made it up to me. no charge for repitch and Balance.
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