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Propeller shaft coupler |
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Jminman 
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Joined: October-04-2015 Location: PA,USA Status: Offline Points: 12 |
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 Topic: Propeller shaft couplerPosted: June-30-2016 at 7:18pm |
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I removed the 4 bolts that hold the coupler onto the back of the drive but I cant free the coupler from my drive. Its a single taper shaft thats bent and im replacing it with a double taper shaft. Any suggestions how to make it simpler and keep me from buying 12 more costly tools?
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gun-driver
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Joined: July-18-2008 Location: Pittsburgh, Pa Status: Offline Points: 4127 |
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Posted: June-30-2016 at 8:06pm |
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You have two choices
1) if the shaft is junk and you aren't getting it straightened... Cut it or 2) use a deep well socket and 4 bolts or all thread and press it off like below. Either way you either have to drop your rudder or the strut to get the new one in. I just did my '95s today took less than an hour to remove dropping the strut add an hour or more to drop the rudder. (depends on the year and gas tank configuration) 
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8122pbrainard
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Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Posted: June-30-2016 at 8:15pm |
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Justin,
I agree with Paul's #1 option. Cut it!! |
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gun-driver
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Joined: July-18-2008 Location: Pittsburgh, Pa Status: Offline Points: 4127 |
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Posted: June-30-2016 at 8:29pm |
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Pete
I talked to the guy today in Cape Cod that some one posted a you tube on awhile back. He will dye test, straighten and cut the face of the coupler if needed for about 1/2 the cost of a new one and said the turn around time is about 5 days after receiving the shaft and coupler. I'm going to send him one of mine and see how it comes out. |
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MrMcD
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Joined: January-28-2014 Location: Folsom, CA Status: Offline Points: 3749 |
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Posted: July-01-2016 at 12:49pm |
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Over the years I have known Machine Shops that could straighten shafts, Some promised to be less than .001 true which is very good. Usually they figure out it takes more time than they originally thought which takes the price up near the cost of a new shaft and they decide not to do it any longer. I would think Labor in cape code is very high like California.
I do think a good straighten is a 100% fix if you can find the shop that will do it. Keep us posted on your results. |
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gun-driver
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Joined: July-18-2008 Location: Pittsburgh, Pa Status: Offline Points: 4127 |
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Posted: July-01-2016 at 4:24pm |
This guy prides himself on being able to make them like new. His over the phone estimate to me was tops 200 bucks and that included dye test and cutting the coupler face if needed. I ordered a new shaft once it comes in ill pack the old one up and send it to be reparpired I'll let you know how it works out. I figure the way I have been going through shafts it's not a bad idea to have a spare 
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8122pbrainard
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Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Posted: July-01-2016 at 4:54pm |
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I've always had second thoughts about shaft straightening especially if the bend is just aft of the strut say from a prop strike. Metal can only be bent so much before it breaks. Here's what I'm always afraid of.
Reids shaft 
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MrMcD
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Posted: July-01-2016 at 5:06pm |
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Before installing a shaft, tap it with a ball pen hammer, if it rings true there are no cracks. If you tap it and it has a dull thud noise your shaft is cracked and should not be installed.
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8122pbrainard
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Posted: July-01-2016 at 6:58pm |
Mark, I'm going to disagree with this method. First, I highly doubt anyone could tell if there was a microscopic fracture from sound. Second, if the crack is large enough to detect by sound, I'd say the crack would also be visual. We aren't talking about a chunk of cast iron!!  I would not advise anyone to try this method.BTW, what would you do with all the "beauty marks" from pounding on a shaft with a ball peen? 
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gun-driver
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Joined: July-18-2008 Location: Pittsburgh, Pa Status: Offline Points: 4127 |
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Posted: July-01-2016 at 7:06pm |
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It's called patina and rich yuppies pay big money for that look
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MrMcD
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Posted: July-01-2016 at 8:06pm |
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Pete, I don't recommend leaving any marks.
If you pull your crankshaft out of your engine and take it in for a re grind or polish guess what they do first before proceeding? They tap it with a ball pen to see if it is good or bad as far a cracks go. For some reason if there is a crack it dulls the tap sound, if the metal is good with no cracks the steel will have a ring to it when you tap it. |
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MrMcD wrote: