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Mercruiser Alpha One Tension Washer

GLM Marine aftermarket stern drive washer upper gearcase outdrive part

  • GLM P/N 28330 replaces OEM 12-45810 or Sierra 18-3712
  • This washer installs between the drive gear and short yoke lock nut in the upper gear case
  • Compatible with all models, all years (except Bravo)

Tech support exploded view Alpha One drawings
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28330 Tension Washer Alpha One 12-45810

28330 Tension Washer Alpha One 12-45810

P/N 28330 Tension washer $4.29

Customers who ordered P/N 28330 also purchased:

28310 Yoke Mercruiser Upper 46020-1
28310 Yoke Mercruiser Upper 46020-1

28310 Upper gear housing Mercruiser short yoke. P/N This part is compatible with all models from 1964 - 1997 (serial numbers 1684188 - 0K999999). Replaces OEM 46020-1. $60.95

26-32511A1 Seal Kit Parts 87500
26-32511A1 Seal Kit Parts 87500

87500 P/N Mercruiser / Alpha 1 Generation 1 upper housing seal kit (up to 1990). Replaces OEM 26-32511A1. $24.95

P/N 87501 1991 and up model lower seal / gasket kit. Replaces OEM 26-88397A1. $25.95

317201 Large Sealant-Johnson
317201 Large Sealant-Johnson

P/N 508235 Small 4 ounce gasket compound. $19.15

P/N 317201 Gasket sealing compound. Use on o-rings and gaskets. $24.15