Mercruiser Outdrive Parts Drawings *How to Videos

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Mercruiser forward bearing *Lower unit part

OEM forward gear tapered roller bearing
MR / RC 1 lower unit Outdrive years 1972 to 1984

  • GLM Marine aftermarket order number # 21590 includes both inside race and cone
  • Mercruiser parts OEM # 31-35928A2 years 1972 thru 1984
  • Large bearing for forward gear in the lower gearcase of Mercruiser 1 and MR outdrives
  • Timken bearing inside cone OEM # M804049 with inside diameter of 1.875 inches
  • Timken tapper bearing outside race OEM # M804010

21590 bearing.

21590 bearing

Timken tapper bearing $59.95