Mercruiser Outdrive Parts Drawings *How to Videos

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Mercruiser Seal kit and Bearings

Lower Unit Outdrive Seals, Bearings and Shim Kit

  • GLM P/N 25110 replaces OEM 31-803068T1 or Sierra 18-8207
  • Compatible with 1970 - 1983 Mercruiser lower units the drive shafts with a pre-load pin on the top
  • Works with the MC-1 and R models with serial numbers 2791957 - 6225576
  • Includes all parts shown in picture below, and all seals gaskets and shims
  • *Note - the upper bearing in this kit is 21570 or Mercury 31-53079A1

25110 Seal Bearing Kit 31-803068T1

25110 Seal Bearing Kit 31-803068T1

25110 Bearing and seal kit OEM 31-803068T1 $233.95

Customers who ordered P/N 25110 also purchased:

87500 Mercruiser upper gearcase seal kit parts

87500 Mercruiser upper gearcase seal kit parts

Complete seal kit P/N 87500 used for upper gearcase repairs. Replaces OEM 26-32511A1, Sierra P/N 18-2648. $16.95

18100 Lower unit OEM 1623-8951A43

18100 Lower unit OEM 1623-8951A43

Complete Mercruiser lower gear case assembly P/N 18100. Compatible with all models from 1970 - 1990, all motors (serial numbers 2791957 - 0A111111) Replaces OEM 1623-8951A43, Sierra P/N 18-2443. $1499.95

30-803097T1

30-803097T1

Transom kit P/N 21950. Contains all bellows and gimbal bearing
Contains all bellows and gimbal bearing for bell housing. Replaces OEM 30-803097T1, Sierra 18-2601. $145.95

Exhaust Bellow bell housing OEM-18654A1

Exhaust Bellow bell housing OEM-18654A1

Exhaust bellow P/N 89100. Replaces OEM 18654A1, Sierra P/N 18-2750. $22.95