TOHATSU MFS 9.9 Owner's Manual page 3

About this manual
This service manual is designed so that service persons are able to perform their work correctly.
Understand the following matters well for efficient repairs.
1 Each chapter begins with the introduction of special tools that are used for the work described in the
chapter so that the service persons are able to figure out the tools needed.
2 Parts that are serviced in each chapter and their details are presented by using a component composition
diagram.
3 Fastening torques are described in the component composition diagram and in the body text and are
critical points of the applicable repair.
4 Pictograms indicate that there is an important instruction for the relevant parts. It also shows the type of
lubricant and its application point(s).
5 The component composition diagrams describe the names of the parts, the quantity of the parts used,
size of fasteners and special notes.
6 Specific works are described in detail by using illustrations and adding advice on the work.
Lower Unit
1.Special Tools
Spring Pin Tool A Spring Pin Tool B Bevel Gear B Nut Wrench
P/N. 345-72227-0 P/N. 345-72228-0 P/N. 346-72231-0
Removing spring pin Installing spring pin
Bevel Gear Bearing Installation Tool Thickness Gauge Bevel Gear Bearing Puller Ass'y
P/N. 353-72251-0 P/N. 3A3-72755-0
P/N. 346-72719-0
Installing forward (A) gear Removing forward (A) gear
Measuring gaps
bearing bearing outer race
ø110 x ø71
Center Plate
Driver Rod Universal Puller Plate
P/N. 3AC-99701-0
P/N. 3AC-99750-0
P/N. 3AC-99702-0
Used with driver rod and needle
bearing attachment Used with center plate and Removing reverse
Positioning propeller shaft housing
gear/bearing
needle bearing attachment
needle bearing
3B7-72731-0
3BJ-72732-0
Backlash Measuring Tool Clamp Dial Gauge Plate Bearing Outer Press Kit
P/N. 3B7-72720-0 P/N. 3B7-72729-0 P/N. 3B7-72739-1
Used to attach dial gauge Installing forward gear (A)
Measuring backlash
whwn measuring backlash bearing outer race
6-2
ii
1
Bevel Gear B Nut Socket
P/N. 346-72232-0
Removing/installing Pinion (B) Gear Nut
Lower Unit
2.Parts Layout
Slide Hammer Kit
Gear Case
P/N. 3AC-99080-0
Removing forward (A) gear
bearing outer race
ø29.5 x ø16.5
Oil Seal Attachment 2
P/N. 3AG-99820-0
Used with driver rod Installing oil
seal in the propeller shaft housing
24 N·m (17 lb·ft) [2.4 kgf·m]
3BJ-72733-0
Needle Bearing Attachment
P/N. 3BA-99710-0
Used with driver rod and center plate
Installing propeller shaft housing
needle bearing
4st 9.9/15/20 2008
Ref.
Description
No.
1 Gear Case
1-1 Needle Bearing
2 Ball Bearing, 6205HS
3 Oil Plug
4 Water Plug
5 Gasket, 8.1-15-1
6 Propeller Shaft Housing
7 Needle Bearing, 17-24-20
8 O-Ring, 2.4-59.6
9 Oil Seal, 17-30-9
10 Bolt
11 Trim Tab
12 Bolt
13 Sub Water Strainer
5
14 Screw
15 Water Strainer
16 Screw
17 Nylon Nut, 4P-0.7
18 Stud Bolt
19 Nut
20 Washer, 8.1-16-1.5
21 Propeller Shaft Housing Ass'y
22 Sub Water Pipe Plug
6-4
2
P/L Fig. 14
3
4
19 N·m (14 lb·ft) [1.9 kgf·m]
1342 1342 342
14 N·m (10 lb·ft) [1.4 kgf·m] 1342
6
5
1342 342 1342
3
1342
7
GEAR GEAR GEAR
5 GEAR
1-1 8
4
18
20
19 GEAR GEAR GEAR
2
GEAR
2
17
21
11
13
14
12
15
22
1
16
5
3
1342 1342
GEAR GEAR
Remarks
Q'ty
1
1
Do not reuse.
2
2
1
3
Do not reuse.
1
1
Do not reuse.
1
Do not reuse.
1
Do not reuse.
2
1
1
1
1
2
1
1
4
4
4
1
1 Option
10
Lower Unit
9
GEAR GEAR GEAR
GEAR
10) Disassembly of Propeller Shaft Housing
OBM OBM OBM
OBM
1. Tighten universal puller plate to make gap between reverse
gear (C gear) and propeller shaft housing.
Universal Puller Plate :
P/N. 3AC-99750-0
2. Remove reverse gear (C gear) ass'y by putting two bladed
screw drivers into the gap to force the gap to open.
1342
342
OBM
OBM OBM OBM
GEAR
3. Use commercially available universal puller plate to remove
ball bearing.
Before removing, check bearing for play or
deflection. Replace if necessary.
CAUTION
Do not reuse removed bearing.
4. Use a press to remove oil seal 2 and needle bearing 3 at
the same time.
4st 9.9/15/20 2008
Before removing, check bearing for play or
deflection. Replace if necessary. Direct
attachment with side without O-ring to needle
bearing.
CAUTION
Do not reuse removed bearing.
Needle Bearing Attachment 3 :
P/N. 3BA-99710-0
Driver Rod 4 :
P/N. 3AC-99702-0
6-12
6
4
3
3
2
2 Oil seal Do not reuse.
Do not reuse.
3 Needle bearing
4st 9.9/15/20 2008
4st 9.9/15/20 2008