Mercruiser Gear Set 4 Cylinder 120/140 Upper gearcase

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Mercruiser Gear Set 4 Cylinder 120/140 Upper gearcase

Upper Gear set Outdrive GM Inline 4 Cylinder 2.5 Liter 120 hp. / 3.0 Liter 140 hp. Engines

Drive shaft housing upper gear set can be installed in MC-1/R/MR and Alpha 1/Gen 2 sterndrive models
Years 1970 - 1997 with serial numbers 2791957 - 0K999999
GLM P/N 11240, Mercruiser OEM # 43-55778A3
Gears have a 1.98 / 1.94 ratio (20-24)
Mercruiser Tech support Exploded view drawings search by part number or description here

11240 Gears

P/N 11240 OEM 43-55778A3 Gear set $332.99

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