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Mercruiser Alpha One Drive Shaft Bearing

Lower Unit Drive Shaft Bearing

  • GLM P/N 21610
  • Replaces OEM 31-42647A1
  • Make sure to replace this part every time it is removed from the shaft and look for writing this side up on bearing

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21610 Roller Bearing Drive Shaft 31-42647A1

21610 drive shaft bearing

P/N 21610 Bearing OEM 31-42647A1 $33.15

Compatible with 1983 - up models (serial numbers 6225577 and up).
Replaces OEM 31-42647A1. $33.15

Customers who ordered P/N 21610 also purchased:

11120 Drive Shaft Mercruiser 45-42634
11120 Drive Shaft Mercruiser 45-42634
P/N 11120 MR / Alpha One drive shaft without nut for the lower gear case. Replaces OEM 45-42634. $533.95

11140 Generation 2-45-816919
11140 Generation 2-45-816919

P/N 11140 Lower housing drive shaft - 1991 and up (Generation 2, serial number 0D469859 and up). Replaces OEM 45-816919, 45-816472, 45-853647, 45-853648. $399.15

87510 Seal Kit 26-33144A2
87510 Seal Kit 26-33144A2

P/N 87510 1970 - 1990 lower unit seal / gasket kit. Replaces OEM 26-33144A2. $35.15

P/N 87511 1991 and up lower unit seal kit. Replaces 26-816575A3. $45.15

317201 Large Sealant-Johnson
317201 Large Sealant-Johnson

P/N 317201 Gasket sealing compound (required for o-rings and gaskets). $24.15