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

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

Mercruiser Alpha One roller bearing 1.50 gear ratio

Tapered assembly P/N 21560 used with 1.50 ratio gear set in upper gearcase

  • Also included in 1.50 ratio upper gear set
  • inner cone 24780 outer race 24720
  • OEM 31-32573A1
  • Also compatible with R/MR

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

21560 bearing for 1.50 gear ratio

21560 bearing for 1.50 gear ratio

P/N 21560 OEM 31-32573A1 $31.29

Customer who bought P/N 21560 also purchased:

V8 43-18410A4 11210 18-2201

V8 43-18410A4 11210 18-2201

P/N 11210 - V8 gear set replaces 43-18411A2 and Sierra 18-2201

Includes driven bearing 31-32573A1
1.50 ratio
20/22 pinion and driven gear tooth count
Serial numbers 3106717 to 0K999999
Years 1970 to 1997.
$444.95

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

P/N 87500 GLM upper unit seal kit for Mercruiser and Alpha 1 Generation 1, 1970 - 1990 models. Replaces Mercury 26-32511A1. $24.15