Home › Forum › Ask A Member › OMC Lower Unit Sealant and Questions › Re: OMC Lower Unit Sealant and Questions
I’m not sure what you mean when you say "end play". Are you saying the prop shaft slops side to side? Or, are you saying the prop shaft can be pulled in and out in the gearcase excessively?
Funny you should mention a leaky prop shaft seal. I am having the same problem on a 40hp Bigtwin gearcase charity job I’m doing. I was so discouraged seeing those air bubbles during the pressure test (in water bucket), I just kind of put the project aside. I used a new OMC prop shaft seal. Admittedly, it is tough to press that seal into the housing without the proper tool, which I did NOT have. I couldn’t get the seal square in the housing and ended up seating it all the way into the housing. I remember looking at the prop shaft, not seeing any problems in the sealing area. The way the seal housing is made, it is tough to determine if the leak was coming from the actual seal, or from a problem between the seal case and aluminum housing, like others have mentioned.
One thing is for dang sure, this is a job you only want to do once! The thought of pulling that skeg back off, cleaning up all that 847, and resealing again is upsetting. Use the proper sealers, OEM parts, and take your time!