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OEM parts *Mercruiser tapered roller bearings

OEM part for upper gearcase

  • GLM Marine aftermarket timkin tapered for the upper gearcase #21510 #21511
  • Tapered bearings are used for the drive shaft housing (upper cover) #21540 #21550 #21560
  • Roller are used for the driven gear #21520
  • Bearing assembly set is used for the drive gear and includes all ratios except 1.32

21510 1.15 16 Driven gear top

21510 1.15 16 Driven gear top

P/N 21510 Tapered (1-15/16 O.D.) OEM 31-61100A1 $28.95

21511 1.25 32 Driven gear top

21511 1.25 32 Driven gear top

P/N 21511 Tapered (1-25/32 O.D.) OEM 31-32575T1 $18.95

21520 OEM set

21520 OEM set

P/N 21520 Drive gear bearing assembly (Includes all ratios except 1.32) 31-35988A12 $117.95

21540 driven 1.65 1.84 1.94 gear ratio

21540 driven 1.65 1.84 1.94 gear ratio

P/N 21540 Tapered bearing (1.65, 1.84, 1.98 ratio) 31-35990A1 $30.95

21550 driven 1.32 ratio

21550 driven 1.32 ratio

P/N 21550 Tapered (1.32 ratio) 31-66818A1 $75.95

21560

21560

P/N 21560 Tapered (1.50 ratio) 31-32573A1 $40.95

Contact our service tech for what type of upper driven bearing you have in the upper gearcase or measure the outside.
There is 2 to chose from and use a 1 - 3 inch slide hammer puller to take bearing out of upper lid or top for help troubleshooting your upper gearcase or any Mercruiser parts or in this case tools call for tech service at (416) 751-7326