43-55778A 3 - Gear Set -1.98:1

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Part Number
43-55778A 3

Mercury Quicksilver

Upper Gear Kit 20-24 teeth, 1.98/1.94 & 2.40 ratio Fits MC-I, R, MR, Alpha One & Gen II (s/n 0K999999 and below) (1970-1997)
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Mercury Quicksilver Gear Set-1.98:1 43-55778a 3 is equivalent to parts:

Mercury Marine produces the Quicksilver line of parts. Quicksilver parts are made for use on Mercury, Mariner, MerCruiser & Force engines. In addition, they cover many applications by the following engine manufacturers: Chris-Craft, Chrysler, Crusader, Evinrude, Johnson, Honda, OMC, PCM, Suzuki, Volvo Penta, & Yamaha.