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On my 1980, Catalina 27, with a 5411 Universal diesel, I have a shaft coupling that covers the transmission coupling. In other words, the shaft coupling is a kind of a "drum" and you cannot see the interface of the shaft and transmission coupling. On the circumference of this "drum" are four bolts that sit in what looks to be an O ring of some sort. I'm guessing that you remove these bolts on the circumference to use your fealer gauge to true up the shaft/engine alignment. Has anyone seen this kind of shaft coupling and can you verify my assumptions above? Thanks for your help.
My coupling looks about like this one except it has the four large hex heads surrounded by the "O" ring looking rubber. Also it doesn't look like one side fits into the other like in the below link.
Greetings Ajay73. My 1981 C-27 has the same Universal 5411 as your 1980. It has wheel steering. The stuffing box hose is about shot, and I need to remove the shaft and do all the fun associated work (new stuffing box, bearings, etc.). The coupler is completely rusted out. Any help you can provide about what you did to replace your coupler and any other items, such as the process and parts sources - and any other things - would be so very much appreciated. Thanks in advance!
DB, I never did have to replace the shaft coupling. I have a Federal flexible coupling. See link below. I did replace the stuffing box hose and the packing and the strut(cutlass) bearing. Removal of the shaft wasn't that bad of a job, although IIRC I did have to remove the rudder which isn't a tough job either. I have tiller steering. I can imagine that a wheel will complicate the job. Once you've been through it it'll be easy. Having the right tools is 90% of the battle. Those tools would be a prop puller and a Strut Pro type tool. I bought the strut bearing from Catalina Direct. The packing I just got locally at West Marine. Make sure you get he 3/16" for a 1 inch shaft. The mechanic I had put in 1/4 inch and the shaft ran very hot(145 F on the infrared thermometer). I replaced it myself with the 3/16 inch and the shaft cooled right down(95 F on the IT). Maybe I could have backed off the packing nut a little more and that may have worked too. But the spec is 3/16 inch. There are no set screws holding the cutlass bearing in on the C27. Just a compression fit.
Here's the coupling I have: Marine Transmissions, Velvet Drive, Paragon, marine transmission parts, <marine transmissions>
Ajay, thank you very much for the information. All will be most helpful. - Dean
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