Mercury 20 EFI FourStroke

Gear Housing and Driveshaft
Ref. No. Qty. Description
Torque
Nm lb‑in. lb‑ft
1 1 Gear housing
2 1 Roller bearing
3 2 Plug 13.0 115 –
4 2 Gasket
5 2 Water strainer
6 1 Screw 1.5 13.3 –
7 1 Nut
8 1 Anode
9 1 Screw 6.0 53.1 –
10 1 Nut
11 1 Rubber water seal
12 1 Water seal plate
13 4 Screw 24.0 – 17.7
14 1 Clutch cam
15 1 Spring pin
16 1 Cam rod
17 1 Spring pin
18 1 Screw 5.0 44.3 –
19 1 Stopper
20 1 Lower pump case gasket
21 1 Lower pump case assembly
22 1 Oil seal
23 1 O‑ring
24 1 Stopper
25 1 Screw 6.0 53.1 –
26 1 Guide plate gasket
27 1 Water pump guide plate
28 1 Key
29 1 Impeller
30 1 Pump case liner
31 2 Dowel pin
32 1 Upper pump case
33 1 Lower water pipe seal
34 4 Screw 6.0 53.1 –
35 AR Shim
36 1 Ball bearing
37 1 Driveshaft
38 1 Pinion gear
39 1 Nut 35.0 – 25.8
Gear Housing (2.15:1)
90-8M0125265 eng NOVEMBER 2017 © 2018 Mercury Marine Page 6A-7