Re: OMC Adhesive M Sealant - Sealer 1000 Substitute
You just need the sealer/adhesive mentioned above. It holds the o-ring seals in place when positioning the impeller housing, and housing liner. If the seals move when you tighten things up you will have a bothced job. I don't see why you can not use the Permatex gorilla snot (yellow stuff), but the OMC adhesive seems easier to remove after it hardens.<br /><br />The OMC Gasket sealing compound you should get from a dealer. Most have it. It is not only used to seal threads and gaskets, but is recommended for coating bolts and preventing their corrosion. I noticed that my OEM lower unit bolts had the sealer on them and they came right out after 3-years of saltwater use. This is a non-hardening sealer. Permatex makes something similar, but I am not sure how it reacts under water.<br /><br />The needle bearing grease is just for holding the drive key onto the shaft while you slide the impeller down. I greased the whole shaft with OMC blue grease, then used a dab of heavy axle bearing grease to hold the key in place. This is the only use I can think of as the stuff turns to cement after years of exposure to salt water.<br /><br />Coat the impeller housing with outboard oil, though any oil will do. Maybe cooking oil is more enviro friendly.<br /><br />The spline end of the shaft needs to be lightly coated with moly grease. This comes with the OMC kit. I would not scrimp here as a frozen spline is a problem you don't ever want to have.