You have Alison MH gears? If you do seals won’t work. The coupling gets a groove worn in it and all the seals in the world won’t help. I unfortunately have done this job several times. I tried polishing the running surface up with Emory paper but it still leaked after couple hundred hours. I ended up taking the couplings to a bearing shop where they froze them and put on a new stainless running surface sleeve. That’s the only way to do it. Make sure the mechanic tightens and torques the nut that holds the coupling on properly. It’s something like 400lb and a very large socket. Fortunately I had the giant Snap On torque wrench from when I rebuilt the engines but most of these butchers use a chisel to tighten the nut. I know of one boat that the nut came loose and the shaft and coupling took out the stuffing box and almost sunk the boat. Stand over the mechanic when he does this it’s critical!!!
I replaced one of mine and never had another leak. I guess it depends on the wear on the mating surface. I do remember bringing in the big torque wrench from the quarry to tighten that nut.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.