Shaft log

[All U Get]

Hi all,

Cruising friends of our from Buffalo had discovered a crack in their shaft log. Would G-Flex epoxy work well for sealing that kind of crack?

Amusing story as I was checking my packing and asked my friend over for a little help in case I decided to change it while in the water. He said his dripped a few drops every minute. Afterwards he went back just to check under his engine and noticed a trickle of water. After opening the access to his packing gland he could then see the flow of water. The sump pump had been keeping up with it but we both noticed only one clamp holding the hose on the shaft log. A quick trip to Ft Pierce and quick haul soon had the boat safely ashore. Then taking it all apart was when he found the crack in the log. How would that happen? Too much tightening on the T-Clamps?

All U Get

 

[Ken Cross]

My first question would be; How old is it? If the rubber gets brittle and a bit of movement from the rotating shaft, I could see it cracking. I think replacement is the fix.
If it weren't able to be pulled out of the water I'd most likely tape it as a temporary fix, but I'd consider it very temporary.

When I added a dripless (PSS) shaft seal the rubber is replaced with new.

Ken

 

[Roland5048]

When I repowered a few years ago, we discovered the shaft log was badly worn. Had one fashioned from SS and installed. So far, so good. Only draw back is the banging from the shaft against the tube upon cold start-up. Running the RPMs up a bit and after warming all is quiet.

 

[heritage]

Then taking it all apart was when he found the crack in the log. How would that happen? Too much tightening on the T-Clamps?

Probably due to loss of zinc in the bronze shaft log. My shaft log never leaked and I only discovered the problem when replacing with a dripless gland. These pics show the original shaft log with stuffing gland removed. Note the pink color of the bronze log due to loss of zinc. Tapping the log with a hammer broke off junks of material.

Replace with a Buck Algonquin shaft log.

 

[All U Get]

Since his boat is out of the water and shaft is pulled out they're going to sleeve it with a stainless tube and re-glass the fiberglass tube. Perfect time to replace the bearing. Another boat beside him, same problem.

All U Get

 

[Dalliance]

Since his boat is out of the water and shaft is pulled out they're going to sleeve it with a stainless tube and re-glass the fiberglass tube. Perfect time to replace the bearing. Another boat beside him, same problem.

All U Get

So, in your friend's case, it was a cracked fiberglass tube, right? I'm not sure I understand the stainless sleeve.
Heritage shows a cracked bronze shaft log in his Hunter 27 that looks like the one I replaced on my '82 Hunter 30 a few years ago. No corrosion on mine. The tube was worn on one side to about 1/3 of it's original thickness by a previously misaligned engine and shaft. Buck Algonquin didn't have the right size, so I had a new one machined by a local shop. There is no room to spare between the coupler and the stuffing box on the Cherubini H30. Maybe different on the H27.

 

[All U Get]

So, in your friend's case, it was a cracked fiberglass tube, right? I'm not sure I understand the stainless sleeve.

The sleeve was inserted inside the fiberglass tube.

All U Get