Re: 1953 5hp Hiawatha 5D10 gear lube

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February 24, 2016 at 1:38 am #32422
retiredoz
Participant

    According to one of my manuals going back to 5D11 (’55), the lower unit takes OMC type ‘B’ lubricant (which comes in a tube, it says). I’m sure some veteran on this site can relate that to a modern equivalent – I’d guess it to be in the 80-90 wt area.
    In an emergency, outboard oil may me used, but the book recommends replacing it with the real stuff pronto.