Alpha One & Gen 2 Outdrive Parts *Drawings *Videos
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Mercruiser Alpha 1 outdrive bearings *tapered roller

Timkin tapered roller type for drive shaft housing with photos and links

  • Photos of each unit
  • GLM part numbers
  • OEM numbers
  • Alpha One outdrive exploded drawing links to individual tapered roller bearing
  • See our upper gearcase drawing page for all other drive shaft housing parts and components
  • Exploded view Mercruiser drawings
    Search by part number or description here

21510 Alpha one bearing cover 1 15-16
21510 Alpha one bearing cover 1 15-16

P/N 21510 Upper cover tapered roller bearing assembly O.D. 1-15/16 inch 31-61100A1 $33.99
21511 Alpha 1 bearing cover 1 / 25-32
21511 Alpha 1 bearing cover 1 / 25-32

P/N 21511 Upper cover assembly (O.D. 1-25/32") OEM 31-32575T1 $12.99
21560 OMC Tapered roller assembly

21560 OMC Tapered roller assembly

P/N 21560 Tapered roller assembly (1.50 ratio) for the driven gear (lower drive shaft) 31-32573A1 $47.99
21540 Mercruiser roller bearing 31-359900A1
21540 Mercruiser roller bearing 31-359900A1

P/N 21540 Tapered roller assembly (1.65/1.84/1.98 ratio) for the driven gear (lower drive shaft) 31-35990A1 $43.95
21520 OMC Alpha1 Gen2 Tapered Roller Bearing
21520 OMC Alpha1 Gen2 Tapered Roller Bearing

P/N 21520 Tapered roller bearing set with all ratios (except 1.32 ratio) OEM 31-35988A12 $179.99

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