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1991 70 HP Merc/Force lower unit.

Thread starter Frank Acampora
Start date Oct 25, 2009

Frank Acampora

Supreme Mariner

Thread starter

Oct 25, 2009

Save me a bit of time actually going down to the garage and spinning the drive shaft and prop.

Does anyone know the actual lower unit gear ratio of a 1991 70 HP Force with the Merc lower unit, thru hub exhaust, and 13 spline 10 inch diameter prop?

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