Alpha 1 & Gen. 2 Outdrive Parts *Drawings *Videos

T.C. Electronics / Marine ( 416 ) 751-7326 home page

Mercruiser Alpha One outdrive cover nut

Cover Nut Part - Installs into lower Gearcase

  • P/N 21120 Cover nut is used to hold the bearing carrier in place in the lower unit
  • Replaces OEM 79448
  • Mercruiser tool # 90190 (OEM 91-61069T) bearing carrier retainer wrench will be required to remove and install this nut

Tech support exploded view Alpha One drawings
Search by part number or description here

21120

21120 cover nut

P/N 21120 Cover nut OEM 79448 $18.29

Customer who bought P/N 21120 also purchased:

87500 Alpha One Gear Case Seal Kit
87500 Alpha One Gear Case Seal Kit

P/N 87500 Mercruiser / Alpha 1 Gen 1, 1970 - 1990 upper gearcase seal kit. Replaces Mercury 26-32511A1. $24.15

26-88397A1
26-88397A1

P/N 87501 Alpha 1 Gen 2, 1991 and up upper housing gasket/seal kit. Replaces Mercury 26-88397A1. $20.15