Cutlass bearing

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Cutlass bearing

Post by Stoker1538 » Sat Nov 11, 2017 10:15 pm

My shaft rattles around a fair bit when I shake it from the prop end

I’ve been informed my cutlass bearing is worn. Is it a simple job to replace? How long should it take roughly and are there any special tools required?

Also does anyone know how I can calculate the size of prop I need for a bukh dv20 engine?


Jolly Roger
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Re: Cutlass bearing

Post by Jolly Roger » Sat Nov 11, 2017 10:54 pm

Have look at some YouTube videos and see how easy it is remove a cutlass bearing. ... ss+bearing

You will not be able to calculate the prop size as it is a combination of many factors like boat weight, hull shape, clearance between the tip of the blade and the hull, etc. Most prop suppliers will advise the best prop based on all the known factors. So contact Silette ( and Darglow (
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Re: Cutlass bearing

Post by FulmarOnia » Sat Nov 11, 2017 11:22 pm

I do most maintence myself, but replacing the cutlass bearing is one job I have left to the boat yard both for the current boat and the previous one. This was very much on the basis that in order to do it the prop shaft had to come out, and in order to do that the rudder had to be dropped, hence you either needed to dig a big pit or have the boat lifted in the air to remove rudder and lifted again to replace.
If that is the case for your set up then you might as well replace the rudder bearings when you drop the rudder - unless you have already done that in the last 10 years!

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Re: Cutlass bearing

Post by TyroSailor » Tue Nov 14, 2017 11:03 am

I say, chaps - it's actually a Cutless bearing, spelt and capitalised thus, as it was originally a trade name. Although I'm disinclined to believe the explanation given here

Wikipedia (sic) says The tradename "Cutless" is a registered trademark owned by Duramax Marine. The name refers to a molded (sic) rubber bearing manufactured by Duramax Marine.[6] The tradename "Cutless" is used for these rubber bearings and this name has also, along with its misspelling 'Cutlass', become a generic term for them.[7]

See also ... arings.htm

Pedantic? Me?

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