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    Question about gear ratio

    This is an early OMC Stringer upper gear unit 1968-71 with 21:13 gear ratio used with 80 and 90 HP. He said that it came off a 4 cylinder. Its the whole upper housing. Sorry thats all the info I have gotten.
  2. R

    Question about gear ratio

    Just looking for help. Right now my outdrive gear ratio is like 21 and 19 with inboard v6. I was wondering if the gear ratio 21 and 13 would hold up? I can get a upper unit with the ratio 21 and 13 very cheap with perfect gears but if they won't hold up then there is no use for it. Any help?
  3. R

    Gear ratio

    Can you go from a 21 20 gear ratio to something like a 21 18? It's a stringer outdrive in a v6. The boat doesnt seem to go to fast and wondering if I change up the ratio it might go a little better just dont want to tear up any gears and get stranded.
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    Omc stringer v4 and v6 gear ratios

    I'm not the best at this but could you use a v4 stringer outdrive on a v6 or would it tear the gears out?
  5. R

    pitch question about gears from v8 put in v6 outdrive

    i was wondering if someone might know what would be the best pitch to get for this. the gears in the upper housing came out of a thomas with a ford v8 in it and i put it in the upper housing for a 4.3 v6 in a renker. the porp now is stamped 15 x 17 but seems like it takes a while to plane out...
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