# IV Speedmaster Gear ratios
05-22-2012, 01:05 PM
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# IV Speedmaster Gear ratios
Had gear issue in a #4 upper. Had someone, certified MERC Speedmaster, repair a drive that had 1.40:1 that gear is NLA instead a 1.330 was used. Was told there would only be a 35 rpm difference between the 2 with the same props and set up. I don't believe this to be true. I need some expert data on this with facts.
