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Old 26-07-2016, 09:55   #1
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1.5 mm play in prop shaft

Upon futher investigations , there is 1.5 mm of play in the shaft bearing.

Is this a deal breaker in regards to taking the boat to its mooring?, I would estimate its a 10 hour trip, and well be motoring for about 3 hours of that 10 hours, replacing the bearing at this time would delay the trip. What is the very worst thing that could happen? The plan would to take the boat out this winter and replace it then, when its at its home base.

Video posted below, have a look.

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Old 26-07-2016, 10:02   #2
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Re: 1.5 mm play in prop shaft

Is the boat just going to sit on the mooring or are you going to use it? If not use it, why take it out there? If use it , then you are going to motoring some right?
Hard to say, but if I needed to I would take it out there, would motor at lower rpm.
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Old 26-07-2016, 10:03   #3
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Re: 1.5 mm play in prop shaft

I'd go for it. If it were a bronze shaft I would say no but you have a little rubber left and the bearing housing is bronze so it won't kill the SS shaft to fast if you did run out of rubber.
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Old 26-07-2016, 10:21   #4
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Re: 1.5 mm play in prop shaft

Im paying money every week for it to be in the yard, I have already paid for the mooring, so it does me no good it just sitting on the hard paying out money, I need it out of there now.
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Old 26-07-2016, 10:48   #5
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Re: 1.5 mm play in prop shaft

Quote:
Originally Posted by gulfbreez View Post
Im paying money every week for it to be in the yard, I have already paid for the mooring, so it does me no good it just sitting on the hard paying out money, I need it out of there now.
You are clearing going to need to replace the bearing. You could..

- Replace the bearing
- Comfortably motor home
- Enjoy the boat

or you could

-Not replace the bearing
-Bite your nails while motoring home
-Not use the boat
-Replace the bearing later

I don't think I get your reasoning. But if I were forced to motor a boat in that condition, I'd do it at whatever RPM minimized the vibration.
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Old 26-07-2016, 10:53   #6
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Re: 1.5 mm play in prop shaft

Thanks for all your imputs
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Old 26-07-2016, 12:16   #7
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Re: 1.5 mm play in prop shaft

If it has RPM zones with minimum vibration, then go for it.
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Old 26-07-2016, 12:27   #8
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Re: 1.5 mm play in prop shaft

You are the same guy who test the engine gear out of the water?? guess if you run the engine in the sweet spot or where there is minimum vibrations you can reach the mooring without troubles,,, don't push to hard the engine , 1,5 mm is not to much to be a problem.... but my 2 cents is better to replace it before and have that peace of mind. Cheers.
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Old 26-07-2016, 15:15   #9
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Re: 1.5 mm play in prop shaft

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Originally Posted by neilpride View Post
You are the same guy who test the engine gear out of the water?? guess if you run the engine in the sweet spot or where there is minimum vibrations you can reach the mooring without troubles,,, don't push to hard the engine , 1,5 mm is not to much to be a problem.... but my 2 cents is better to replace it before and have that peace of mind. Cheers.
Yeah, thats us. did you see the video I posted?

My friend is going to pay me to repair it, but we really just want to get going now. We have had a few boat builders down at the yard tell us we shouldnt have a problem.
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Old 26-07-2016, 15:33   #10
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Re: 1.5 mm play in prop shaft

Well is to much play, that bearing is fried, then the question if you can reach a rpm zone where the vibrations keep your teeth in place, I mean you probably fine for 3 hours motoring.....or even maybe more who know, keep in mind with water is a diferent history since the water act like a cushion,,,, change that bearing as soon as posible guys,, good luck.
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Old 26-07-2016, 18:27   #11
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Re: 1.5 mm play in prop shaft

Is the play caused by age and failure to replace bearing when required or was it caused by mis-alignment. If caused by mis-alignment the wear will accelerate exponentially.
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Old 26-07-2016, 18:49   #12
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Re: 1.5 mm play in prop shaft

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Is the play caused by age and failure to replace bearing when required or was it caused by mis-alignment. If caused by mis-alignment the wear will accelerate exponentially.
Not caused by mis-alignment, that I can tell you, I have had a couple of experts look at it. They dont seem to think its that huge of a deal. But im trying to get some more input
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Old 26-07-2016, 18:53   #13
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Re: 1.5 mm play in prop shaft

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Originally Posted by gulfbreez View Post
But im trying to get some more input
Yeah well, "if it's gonna happen it going to happen out there". You got your info now just go.
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Old 26-07-2016, 19:05   #14
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Re: 1.5 mm play in prop shaft

If I understand correctly, you're out of the water now. Costs a day on the hard to replace now? Otherwise, costs another haulout? Dividend = Piece of mind. I know what I would do.
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Old 27-07-2016, 04:55   #15
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Re: 1.5 mm play in prop shaft

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Originally Posted by jamhass View Post
If I understand correctly, you're out of the water now. Costs a day on the hard to replace now? Otherwise, costs another haulout? Dividend = Piece of mind. I know what I would do.
Trust me, iv been thinking about a possible haulout, its not cheap I know.

Yes, its on the hard
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