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Old 17-07-2016, 09:30   #1
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Loud prop shaft

Hi all,

Have owed my Macwester for a few months now, prepping it the other day for delivery to its mooring we went right through the boat. Our 2014 20 hp beta engine starts and runs great. Now my friend decides to put it in forward gear on the hard, I know this should not be done, but he wanted to make sure that the shaft was turning. Anyway, while it was in forward gear the shaft is pretty loud. Not vibrating that much, but just loud. At one point the noise went away, but then a few sec later came back. In total it was in gear for maybe 2 min off and on. Is this normal when on the hard?
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Old 17-07-2016, 09:43   #2
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Re: Loud prop shaft

Do you put a hose of fresh water trough the shaft bearing?\
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Old 17-07-2016, 09:46   #3
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Re: Loud prop shaft

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Do you put a hose of fresh water trough the shaft bearing?\
No, just through the water intake. As we were instructed by the Marine mechanic
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Old 17-07-2016, 09:52   #4
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Re: Loud prop shaft

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No, just through the water intake. As we were instructed by the Marine mechanic
Ok, cutlass bearing are supposed to lubricate with water, if your friend run the engine in gear for 2 mins with no water at all in the bearing my 2 cents is melted or damaged right now, that's why you ear noise from there... check your bearing for damage and run the gear with water in the bearing or in the water... Cheers.
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Old 17-07-2016, 10:07   #5
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Re: Loud prop shaft

You will the l need to pull the shaft and replace the cutlass bearing. Chalk it up to experience and don't repeat the error. While your at it check your packing or dripless if you have it.
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Old 17-07-2016, 10:22   #6
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Re: Loud prop shaft

You likely ruined your cutlass bearing. metal and dry rubber don't do well together.
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Old 17-07-2016, 10:45   #7
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Re: Loud prop shaft

Well thats bad news...
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Old 17-07-2016, 11:17   #8
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Re: Loud prop shaft

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Originally Posted by neilpride View Post
Ok, cutlass bearing are supposed to lubricate with water, if your friend run the engine in gear for 2 mins with no water at all in the bearing my 2 cents is melted or damaged right now, that's why you ear noise from there... check your bearing for damage and run the gear with water in the bearing or in the water... Cheers.
On the macwester's does the shaft have to be removed to replace the bearing?

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Old 17-07-2016, 11:24   #9
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Re: Loud prop shaft

Before you go pulling the cutlass bearing check out how much side to side and up and down play you have in the shaft. If its not excessive then don't worry about it. You might as well replace the packing material on shaft if that hasn't been done for a while. Two minutes is not a long time.
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Old 17-07-2016, 12:05   #10
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Re: Loud prop shaft

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Before you go pulling the cutlass bearing check out how much side to side and up and down play you have in the shaft. If its not excessive then don't worry about it. You might as well replace the packing material on shaft if that hasn't been done for a while. Two minutes is not a long time.
Yeah, I would say 2 min in total, off and on....

And not full throttle, just one notch beyond neutral
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Old 17-07-2016, 12:13   #11
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Re: Loud prop shaft

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On the macwester's does the shaft have to be removed to replace the bearing?

Nahh, you don't need to remove the prop shaft since your cutlass bearing is external bolted to the deadwood, just the prop and the bearing housing.
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