Reply To: Water pump housing O-ring for 1958 Mark 10

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March 3, 2022 at 12:08 pm #255558
03aspina
Participant

    Hey guys, a couple of other questions:

    I’ve seen a video of this job on YouTube, and they put a gasket with RTV sealer between the midsection and lower unit.  This motor I’m working on did not have a gasket and no indication there ever was one (I am sure it has not been apart).   It would seem to me that the cavity with the gears and water pump housing would be sealed off with the o-rings and then with the gasket that is under the inspection plate up above.

    Should any kind of sealant be used around the o-rings, like you do on the spaghetti seal on a two-piece OMC lower unit?

    Is it advisable to use modern 90 wt hypoid oil in these, or should I stick with a 600 wt type of oil like the old Quicksilver Aeromarine was?

    Thanks.