Mercruiser Outdrive Parts Drawings *How to Videos

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Mercruiser cover bolt upper gearcase part

GLM aftermarket upper gear case cover bolt

  • GLM part P/N 28300
  • OEM 10-98794
  • Install in Mercruiser upper gear case top cover assembly P/N 28400

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28300 Mercruiser bolt

28300 Mercruiser bolt

P/N 28400 Upper gear case top cover assembly $4.29

Customers who bought P/N 28300 also purchased:

21510 top cover

21510 top cover

P/N Mercruiser outdrive bearing 21510 Top cover 31-61100A1 $28.95

O.D. 1-15/16 inch *Please measure outside diameter of yours if you are unsure of what model you have

120/140 (1971 - 1982) 1.98 ratio serial numbers 3213658-6225576
165/888/225/233/898/228/250/260 (1971 - 1982) all ratios serial numbers 3213658 & up
R/MR/Alpha 1/Generation 2 (1983 - 1995) all models serial numbers 6225577-0F679999

87500 Upper gearcase Mercruiser

87500 Upper gearcase Mercruiser

P/N GLM 87500 Upper housing seal and gasket kit, replaces OEM 26-32511A1 $24.00
MR / Alpha 1 (1964 - 1990) S/N 1684188 - OD469858