Parts Catalog

Replacements
Home / Mercury / Mercury Marine [Updated: Apr. 10, 2026] / Outboard / 2 Stroke EFI / 300X (3.0L) PRO MAX / [0T235084 THRU 0T429939] - USA - Cat.# 90-85552901 / Gear Housing Chart

Gear Housing Chart

Parts (10)

#Part NumberDescriptionQtyStatus
0 840470T9 GEAR HOUSING ASSEMBLY Complete (Torque Mater) (1.62:1) 1 superseded
0 840470T8 GEAR HOUSING ASSEMBLY Complete (Torque Mater) (1.75:1) 1 disc.
0 840306T6 GEAR HOUSING ASSEMBLY Complete, With Torque Tab (Sport Master) (1.62:1) (Standard Rotation) (With Torque Tab) 1 disc.
0 840307T12 GEAR HOUSING ASSEMBLY Complete (Sport Master) (1.62:1) (Standard Rotation) (With Out Torque Tab) 1 disc.
0 840306T7 GEAR HOUSING ASSEMBLY Complete, With Torque Tab (Sport Master) (1.75:1) (Standard Rotation) (With Torque Tab) 1 disc.
0 840307T13 GEAR HOUSING ASSEMBLY Complete (Sport Master) (1.75:1) (Standard Rotation) (With Out Torque Tab) 1 disc.
0 859399T22 GEAR HOUSING ASSEMBLY Complete (Fleet Master) (Standard) (1.75:1) 1 superseded
0 840307T10 GEAR HOUSING ASSEMBLY Complete (Sport Master) (1.62:1) (Counter Rotation) (With Out Torque Tab) 1 disc.
0 840307T11 GEAR HOUSING ASSEMBLY Complete (Sport Master) (1.75:1) (Counter Rotation) (With Out Torque Tab) 1 disc.
0 859399T23 GEAR HOUSING ASSEMBLY Complete (Fleet Master) (Counter Rotation) (1.75:1) 1 superseded