Part 1 of 3. Tips for removing and replacing a cutlass bearing for a boat's propeller shaft
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- Опубликовано: 17 окт 2024
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This tutorial is a collection of tips and pointers for removing a cutlass bearing for your propeller shaft. This is a job that can save you money in a boat yard or save you in a far off location as a cruiser.
This is the first of a short three part series that shows how to remove the bearing without damaging your strut and then the next prepares the strut and bearing for installation and the final is a simple install technique. There are other install techniques and we will show those in future videos. The bearing went in so smoothly due to the prep, that it did not require other tricks.
We have owned over 150 boats and helped in boatyards for almost 30 years. In this time we have serviced a few propellers while also teaching others how to do it. There are a few little tricks that make it easier as well.
This video shows the service of a standard strut and bearing that is found on boats from 10 feet to over 100 feet. The actions of the service are the same for all sixes but keep in mind that the wall thickness will be different depending on the size of the bearing and shaft.
We did not mention it in our videos, but don't forget to check your strut zinc. Sometimes it is already gone and there is only a hole for a zinc as you see in our videos. If this is the case or if you have an old zinc on the strut, this is the time to replace it and save your strut from being destroyed by electrolysis.
This is the third video for our new Real World Sailboat Repair Channel. We show you how to get this repair done out in the real world just the way that you will have to do it instead of on a bench or shop. Please pardon the less than perfect sound or picture as we are doing this bearing change out in a busy boat yard.
Capt. Scott
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Can not recommend this guy enough followed his instructions and he answered my questions and I have a new working bearing in place now . I was quoted stupid money
Luckily, the strut support has been welded to the boat. A much easier way, without an extractor, is to demount a new metal saw blad, put it through the old cutlass bearing, and put it back together in its fasteners. You then saw de bearing throug in one place. Saw is again throug 2cm to the left (or right) from where you had sawn the first time. So you have a small (but long) piece of loose cutlass bearing which you can easily and gently hammer out. The remainder of the cutlass bearing needs soms creeping oil to loosen it from the inside of the CB. You hammer it out gently.
It's still is a pain ITN because you need to check the alignments to prevent vibration, wear and noise.
Happy sailing !
Good video! One other suggestion is to place an over length screw in the set screw hole and turn until copper sleeve is raising enough inside the tube which helps prevent cutting into the strut. I prefer the StrutPro....
I'd advise against this. I read that tip in a book or online and it was a terrible idea. It simply stripped the threads of the set screw hole in the strut. The brass shell of the cutlass bearing is very strong and trying to crush it with a bolt will likely just ruin the set screw hole.
Just got my sailboat and I'm doing all of these projects now. Got the prop off last week. This week I'll get the cutlass bearing out. (hopefully)
Let's us know if we can help. Rock and roll!!
You could potentially use a press-in bearing removal tool for automotive. I'd just get an impact socket that was slightly smaller than the bore, and then go at the back of it with an air hammer or cordless rotary hammer. Not trying to be a snob... I just figured this was a lot of work for removing a press-in sleeve.
Also another idea you could play around with... if you have any dry ice (or regular ice if you're desperate) you could pack the sleeve with the ice and heat the strut. Another thing that can cause flash freeze is some compressed air bottles. You could have that sleeve freezing in seconds. For more info on this, look up "Turning Water Into Ice Using a Can Of Air Duster" It can freeze your flesh, instantly. Use with caution.
You dont need to remove the p shaft and cut the brass housing of the cutless as this video suggests if you use a strut pro bearing removal tool. You just remove the prop. I bought the strut pro, removed and replaced my cutless mylself , then swapped the strut pro tool for 400$ of work from our local boat mechanic with lifetime borrow rights for my strut pro.
I'm fat and cranky too but I think a chipping hammer with the right attachment would make it easy for sure!
If you would have cut up and not down, that would have been much better.
Would a plasma cutter make it easier? Maybe a chipping hammer to knock that bearing loose??!!
A nuke would certainly get it out, but we like a fee parts to be left on the boat
Would it not be easier to make 2 cuts into it with less beating the snot out of it
Most certainly, but then you get two little grooves in the strut instead of one. I prefer the beating and less grooves. Some people save the time and effort. There is no wrong approach for between these two - just preference. Thanks for bringing it up.
Surely use a draw bar...controlled pull with no beat the sh**te out of it . Simple threaded bar and tube...any way we all have our methods
There’s no need for such hard work and violence to the machinery. Just buy a bearing puller in a hardware store for usd20, or make one.
...or just get a puller!
I would not let you boat yard butchers near my boat!!! Beat on a strut with a lump hammer? WTF!! Go get a threaded rod!!