Cutlass Bearings

[mrloudly]

How long should these units last? I'm being told ours need replacing but the boats only done 125 hrs from new... Does this sound right or is somebody on a money making scheme???

<hr width=100% size=1>Andy M

 

[jfm]

I would expect 1000 hours+ We got 5-600 hours on our last boat at 1000rpm shaft speed and they were fine.

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[Deleted User YDKXO]

Re: Cutless Bearings

Cutless bearings are a well known boatyard income generating ruse (I didnt call it a scam) like replacing brake discs at a car garage. If you take the propshaft in your hands near the prop and wiggle it from side to side and you can feel definite looseness between the shaft and the bearing, then the bearing needs replacing
However, as jfm says, you would normally expect cutless bearings to last for several hundred hours and, if indeed the bearings are worn after only 125hrs, then you could have a shaft alignment problem. Worth asking a competent engineer to check this.

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[sailorman]

it would depend greatly where u use the craft, east coast very muddy with particulates in suspension wear the bearing out much quicker than say the channel

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[steverow]

Everybody's on a moneymaking scheme..check 'em first as previously posted.

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[longjohnsilver]

Yep definitely 1000+ hours unless excessive wear due to incorrect engine /shaft alignment or possibly very silty/sandy water, but this is unlikely.

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[LeytonC]

Re: Cutless Bearings

I think i read in MBM that you can only wiggle them and get a 'real' measure of the wear just after the boat has been lifted out - I might be wrong here, so dont quote me...



<hr width=100% size=1>Thanks

Leyton
(EXTAR Solutions - Software that works for you)

 

[pheran]

Re: Cutless Bearings

Not true. I lifted my last boat out in the autumn and didn't replace the bearings until four months later - and you could certainly 'wiggle' them then. You do need to spin the shaft a couple of time tho' to make sure its not binding on the bearing liner before you 'wiggle'

<hr width=100% size=1><font color=blue>A convert to steel boats and displacement cruising - the only way to go</font color=blue>

 

[LeytonC]

Re: Cutless Bearings

ah, ok - just thought i would post just in case. I am on Legs so not qualified to #
talk /forums/images/icons/laugh.gif



<hr width=100% size=1>Thanks

Leyton
(EXTAR Solutions - Software that works for you)

 

[TonyBrooks]

Years and years on the upper Thames with a fleet of hire boats (customers often apperad to use them as dregers ;-), in use over 20 weeks a year.

If checking by "waggling" the shaft take care. I always found a little movement in the bearing, even when new, caused by the rubber being slightly compressible. You should not be able to feel a "sort of soft knock" as the shaft moves through the play and back against the other side of the bearing - if you do it is probably worn.

This gives the opportunity to show a customer the movement and explain that it is worn and needs changing - much like using a high rate discharge tester on a flat battery and wexpaining to the customer that the battery is faulty because teh needle is in the red - another motor trade idea.

Tony Brooks

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