Alpha 1 lower unit rebuild kit *Gears *Seals *Bearings

GLM Marine aftermarket parts kit contains:
Lower gearcase gears, shims, bearings and seal kits

Last updated on 12/08/2023, 01:17:46

  • Parts included in kit 25125 contains the following items
  • Lower gear-case gear set 13/21 ratio OEM 43-96084A4
  • Sliding clutch dog 52-66063
  • Roller bearing 3130895
  • Ball bearing 30-88957A1
  • Tapered roller bearing 31-35928A1
  • Shim 15-47397
  • Pinion nut 11-35921
  • Tab washer 14-79447
  • Seal kit P/N 87510 26-32511A1
  • Click here for upper housing gear sets
  • Tech support exploded view gear set drawings
    Search by part number or description here

25115 seals gears bearings shims

P/N 25125 Alpha One parts kit OEM 43-803091T1 $699.99

Instruction for 10 hour break-in period

Avoid full throttle starts
Do not operate at constant speeds for extended periods
Do not exceed 75% of full throttle during the first 5 hours of operations.
During the next 5 hours, full throttle operation is permissible for brief periods.
Shift into forward gear a minimum of 10 times during break-in with moderate engine speed after each shift

Customers who ordered P/N 89100 also purchased:

87510 Mercruiser seals gasket kit 26-33144A2

P/N 87510 seal kit for Mercruiser lower units 1970 – 1990 models.

Replaces Mercury 26-33144A2. $42.95

21950 Bellows 30-803097T1

P/N 21950 For 1970 – 1990 Mercruiser models with serial numbers 3469428-0D46985. $145.95