Lower Unit - TOHATSU MFS 4 Service Manual

1. Special Tools .................................... 6-2
2. Parts Layout .................................... 6-3
Drive Shaft Housing................................. 6-4
3. Inspection Item ................................. 6-8
1) Draining Gear Oi .............................. 6-8
2) Removing Propeller ........................... 6-8
3) Removing Lower Unit ........................ 6-9
4) Disassembly of Water Pump ............... 6-9
5) Inspection of Water Pump.................. 6-10
6) Removing Propeller Shaft Housing Ass'y ... 6-11
7) Disassembly of Propeller Shaft Housing ... 6-12
8) Inspection of Propeller Shaft Housing... 6-12
9) Assembly of Propeller Shaft Housing ... 6-13
10) Removing Drive Shaft ..................... 6-13
11) Disassembly of Propeller Shaft Ass'y ... 6-14
12) Inspection of Propeller Shaft............... 6-14
13) Assembly of Propeller Shaft Ass'y ...... 6-14
14) Removing Clutch Cam and Cam Rod ... 6-15
15) Disassembly of Clutch Cam and Cam Rod ... 6-15
16) Inspection of Clutch Cam and Cam Rod ... 6-15
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Lower Unit

17) Assembly of Clutch Cam and Cam Rod... 6-16
18) Removing Pump Case (Lower) ......... 6-16
19) Disassembly of Pump Case (Lower) ... 6-16
20) Assembly of Pump Case (Lower) ...... 6-16
21) Inspection of Drive Shaft .................. 6-17
22) Inspection of Pinion (B) Gear and
Forward (A) Gea .............................. 6-17
23) Disassembly of Gear Case ............... 6-18
24) Inspection of Gear Case .................. 6-19
25) Assembly of Gear Case..................... 6-19
26) Installation of Forward Gear and
Pinion Gear (A and B Gears) ............ 6-20
27) Reassembly of Pump Case (Lower) ... 6-20
28) Installation of Clutch Cam and Cam Rod ... 6-20
29) Determination of forward (A) gear backlash ... 6-21
30) Installation of Water Pump ............... 6-23
31) Installation of Propeller Shaft Housing ... 6-24
32) Filling with Gear Oil ........................ 6-25
33) Installation of Lower Unit .................. 6-25
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