Parts Catalog

Replacements
Home / Mercury / Mercury Marine [Updated: Apr. 10, 2026] / Outboard / 2 Stroke EFI / 300X (3.0L) PRO MAX / [0T429940 THRU 0T999587] - USA - Cat.# 90-85552902 / Gear Housing (Drive-TorqueMaster/FleetMaster-Heavy Duty)

Gear Housing (Drive-TorqueMaster/FleetMaster-Heavy Duty)

Parts (70)

#Part NumberDescriptionQtyStatus
- 840470T9 GEAR HOUSING ASSEMBLY Complete (1.62:1Torque Master) [0T997973] & Below 1 superseded
- 840470T17 GEAR HOUSING ASSEMBLY Complete (1.62:1-Long Torque Master) [0T997974] & Up 1 superseded
- 840470T8 GEAR HOUSING ASSEMBLY Complete (1.75:1 Torque Master) [0T997973] & Below 1 disc.
- 840470T16 GEAR HOUSING ASSEMBLY Complete (1.75:1-Long Torque Master) [0T997974] & Up 1 superseded
- 840470T24 GEAR HOUSING ASSEMBLY Complete (1.75:1-X-Long Torque Master) 1 superseded
- 840470T18 GEAR HOUSING ASSEMBLY Complete (1.87:1-Long Torque Master) 1 superseded
- 840470T19 GEAR HOUSING ASSEMBLY Complete (2:1) (2.0:1-Long Torque Master) 1 superseded
- 840470T25 GEAR HOUSING ASSEMBLY Complete (1.75:1 Long-Standard Fleet Master) 1 superseded
- 840470T20 GEAR HOUSING ASSEMBLY Complete (1.75:1 X-Long-Standard Fleet Master) 1 superseded
- 840470T22 GEAR HOUSING ASSEMBLY Complete (1.75:1 XX-Long-Standard Fleet Master) 1 superseded
- 840470T26 GEAR HOUSING ASSEMBLY Complete (1.75:1-Long-Counter Fleet Master) 1 superseded
- 840470T21 GEAR HOUSING ASSEMBLY Complete (1.75:1-X-Long-Counter Fleet Master) 1 superseded
- 840470T23 GEAR HOUSING ASSEMBLY Complete (1.75:1-XX-Long-Counter Fleet Master) 1 superseded
- 816575A6 SEAL KIT Gear Housing 1
- 817275A5 REBUILD KIT Water Pump (1.62 and 1.75 Gear Ratio) 1
- 817275A11 REBUILD KIT Water Pump (1.87 and 2:1 Gear Ratio) 1
- 43026T11 REPAIR KIT Water Pump Impeller [0T997973] & Below 1 superseded
- 43026Q06 REPAIR KIT Water Pump Impeller [0T997974] & Up 1 superseded
1 840470T5   GEAR HOUSING ASSEMBLY Basic 1
10 191833       SEAL 1 superseded
11 859402     PITOT TUBE 1
12 85944975     TUBING (72.00 Inches Bulk) Cut to 7 Inches (Use where Applicable) 1
13 881866     FITTING 1
14 858934     COVER 1
15 858935     GASKET 1
16 36318     O-RING (.799) 2 superseded
17 82130016     SCREW (M6 x 16) 2
18 8164641     SEAL Oil 1 superseded
19 NSS   NOT SOLD SEPARATE Pinion Gear (Part of Forward Gear Kit) 1
2 379721     PIN 1
20 92721   WASHER (.965 x .630) 1
21 35921   NUT (.625-18) 1
22 77674   WASHER (.35 x .75 x .12) 1
23 824145   SHIFT SHAFT (LOWER) 1
24 43037   KEY 1 superseded
25 848831   DRIVESHAFT [0T997973] & Below 1 disc.
25 881938   DRIVESHAFT (Long) [0T997974] & Up 1
25 881942   DRIVESHAFT (X-Long) [0T997974] & Up 1
26 38657A1   SHIM ASSEMBLY AR disc.
27 48939A2   BEARING Taper Roller 1 superseded
28 NSS     NOT SOLD SEPARATE Cup 1
29 42637A1   SHIM SET AR disc.
3 821526     FILLER BLOCK 1 superseded
30 36387A1   BEARING ASSEMBLY Roller/Cup 1 superseded
31 NSS     NOT SOLD SEPARATE Cup 1
32 8245191   RETAINER 1
33 840836A2   CARRIER ASSEMBLY 1 superseded
34 90011     O-RING (2.175 x .175) 1 superseded
35 66302     SEAL Oil 1 superseded
36 66302     SEAL Oil 1 superseded
37 82130016     SCREW (M6 x 16) 2
38 817275A1   HOUSING KIT Water Pump (1.62 and 1.75 Gear Ratio) 1
38 817275A10   HOUSING KIT Water Pump (1.87 and 2:1 Gear Ratio) 1
39 816575A2     SEAL KIT 1
4 826134Q     ANODE 2
40 430331     GASKET 1
41 8172771     GASKET Water Pump, Upper 1
42 8172761   FACEPLATE 1 superseded
43 43026T2   IMPELLER 1
44 82130016   SCREW (M6 x 16) 4
45 832942A1   COUPLING ASSEMBLY 1
46 21836     O-RING (.796 x .139) 1 superseded
47 35027     O-RING (1.046) 1 superseded
48 848832A1 DRIVESHAFT ASSEMBLY [0T997973] & Below 1
49 823902   COUPLING [0T997973] & Below 1
5 4000333     SCREW (M6 x 40) 1
6 401386     NUT (M6) Stainless Steel 1
7 42647A1     BEARING ASSEMBLY Roller 1
8 43044     PIN Dowel - Without Hole (.375 x .625) 2
9 79953Q2     SCREW KIT (.375-16 x .250) Drain 1 superseded