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Complete Mercruiser upper gearcase housing

Complete GLM Marine Upper Gearcase 120/140, 470, 165 and V8 Outdrive Motors

  • New replacement housing assembly from GLM Marine aftermarket parts P/N 18100
  • Replaces OEM 1547-9421A20, 1547-9412A21, 1547-9412A22, 1547-9412A23 and 1547-9412A19
  • Gearcase contains gears, shafts, and all other internal parts including universal joints and drive shaft
  • For an empty GLM aftermarket MerCruiser upper gear housing, see our upper gear housing page
  • Tech support Exploded view drawings
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19000 upper gearcase

19000 upper gearcase

P/N 19100 Most V8 motors under 300 hp 1.50/1.47 ratio (20/22) OEM 1547-9421A20 $1099.99

P/N 19200 6 cylinder inline 165 hp 1.65/1.62 ratio (24/24) OEM 1547-9412A21 $1099.99

P/N 19300 470/485 and 4.3L V6 1.84/1.81 ratio (20/22) OEM 1547-9412A22 $1099.99

P/N 19400 120/140 hp 4 cylinder inline 1.98/1.94 ratio (20/24) OEM 1547-9421A20 $1099.99

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