Mercruiser Upper Gearcase Pre/R/MR/Alpha One 1.98 Gearset 43-55778A3 120hp 140hp Heads so take a look at

so take a look at them closely to get the best idea if this is right for your application

May also work With Omc Cobra PleasureCraft Indmar MerCruiser Crusader applications as well

Bearings 29-20046

12-27807 Washer

Found on all models of 2

Mercruiser Upper Gearcase Pre/R/MR/Alpha One 1.98 Gearset 43-55778A3 120hp 140hp Heads so take a look atItem Details All 120hp 2. 5L & 140hp 3. 0L 4cyl applications for Pre Alpha R MR ALPHA ONE Gen 1, so 1970 1990 as a general rule. (Actually these were also used on Gen II drives 1991 1997) The gear set here is 43 55766 43 55778 > 43 55778A3 (Sierra equivalent 18 2205) (Also Equivalent to 43 55766A2 43 55766A3) 20 24 (tooth count) 1. 98 Ratio for 4 cylinder GM Chevy 120hp 2. 5L 153CID 140hp 3. 0L 4cyl 181CID sterndrive engines. If you have any questions