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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 from 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)

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11240 Gears

11240 Gears

P/N 11240 OEM 43-55778A3 Gear set $259.15

Customers who viewed this item all so
purchased one of the following:

21520 Double bearing 31-35988A12
21520 Double bearing 31-35988A12

P/N 21520 Yoke and gear bearing assembly #31-35988A12 $99.00
All Mercruiser models (1964 & up) except 1.32 ratio and Bravo/TR/TRS models
Includes spacer

11130 upper drive shaft

11130 upper drive shaft

P/N 11130 Vertical Drive Shaft OEM 45-55796 $92.15

28350 Retainer

28350 Retainer

P/N 28350 GLM Marine aftermarket Mercruiser bearing retainer nut OEM 983880 $19.29