Tohatsu MFS 30 [6/319] Ignition syste
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Tohatsu MFS 30 [6/319] Ignition syste

iv
25/30 2006
5 Ignition System ………………………… 4-20
(1)
Configuration of Ignition System
… 4-20
(2) Ignition Control ……………………… 4-21
1) Ignition Timing Controls …………………… 4-21
2) Ignition and Combustion Orders ………… 4-21
3) Ignition Timing ……………………………… 4-21
4) Operations…………………………………… 4-21
(3) Fuel Feed System …………………… 4-22
6
Components of Fuel Feed System
… 4-23
1)
Fuel Pump (Low Pressure Mechanical Pump)
… 4-23
2) Vapor Separator …………………………… 4-23
3) Fuel Regulator ……………………………… 4-24
4) Fuel Cooler ………………………………… 4-24
7
Outline of Fuel Injection System
… 4-25
1) Air Intake System …………………………… 4-25
8 Inspection Items ……………………… 4-26
1) Inspection of Fuel Supply System Piping… 4-26
2) Inspection of Filter ………………………… 4-26
3) Inspection of Fuel Pump …………………… 4-28
4) Inspection of Fuel Connector ……………… 4-28
5) Measuring fuel pressure …………………… 4-29
6) Inspection of Fuel Regulator ……………… 4-30
7) Draining Fuel………………………………… 4-31
8) Disassembly of Vapor Separator ………… 4-31
9) Inspection of Vapor Separator …………… 4-32
10) Reassembly of Vapor Separator ………… 4-33
11) Inspection of ISC (Idle Speed Control) …… 4-33
12) Inspection of Idle Speed …………………… 4-33
5.Power Unit
1 Special Tools……………………………… 5-2
2 Parts Layout ……………………………… 5-3
Engine …………………………………………… 5-3
Recoil Starter …………………………………… 5-4
Magneto & ECU ………………………………… 5-5
Electric Parts …………………………………… 5-6
Fuel Pump, Fuel Rail, Vapor Separator ……… 5-8
Intake Manifold ………………………………… 5-11
Cam Shaft & Oil Pump ………………………… 5-12
Cylinder Head…………………………………… 5-13
Intake Valve & Exhaust Valve ………………… 5-14
Cylinder ………………………………………… 5-15
Piston & Crankshaft …………………………… 5-16
Top Cowl ………………………………………… 5-17
3 Inspection Items ……………………… 5-18
1) Inspection of Compression Pressure……… 5-18
2) Inspection of Oil Pressure ………………… 5-19
3) Inspection of Valve Clearance …………… 5-20
4) Removing Power Unit ……………………… 5-22
5) Removing Timing Belt and Pulley ………… 5-25
6) Inspection of Timing Belt …………………… 5-26
7) Installation of Pulley and Timing Belt……… 5-27
8) Removing Cylinder Head…………………… 5-30
9) Inspection of Valve Spring ………………… 5-32
10) Inspection of Valve ………………………… 5-33
11) Inspection of Valve Guide ………………… 5-33
12) Inspection of Valve Seat …………………… 5-34
13) Correction of Valve Seat …………………… 5-35
14)
Inspection of Rocker Arm and Rocker Arm Shaft
… 5-37
15) Inspection of Cam Shaft ……………… 5-38
16) Inspection of Cylinder Head …………… 5-39
17) Inspection of Oil Pump ………………… 5-40
18) Installation of Valves …………………… 5-41
19) Installation of Cam Shaft ……………… 5-42
20) Installation of Rocker Arm Shaft ……… 5-42
21) Installation of Oil Pump ………………… 5-43
22) Installation of Cylinder Head…………… 5-44
23) Disassembly of Cylinder Block………… 5-45
24) Inspection of Piston Outer Diameter … 5-46
25) Inspection of Cylinder Inner Diameter… 5-46
26) Inspection of Piston Clearance ……… 5-46
27)
Inspection of Piston Ring Side Clearance
… 5-47
28) Inspection of Piston Rings …………… 5-47
29) Inspection of Piston Pins ……………… 5-48
30)
Inspection of Connecting Rod Small End Inner Diameter
… 5-48
31)
Inspection of Connecting Rod Big End Side Clearance
… 5-48
32) Inspection of Crankshaft ……………… 5-49
33)
Inspection of Crank Pin Oil Clearance
… 5-50
34)
Inspection of Crank shaft Main Journal Oil Clearance
… 5-51
35)
Inner Diameter of Cylinder/Crank Case Bearing Holder (Inner Diameter Code)
… 5-52
36)
Thickness of Bearing (Color of Inner Diameter Code)
… 5-52
37)
Assembling Piston and Connecting Rod
… 5-53
38) Installation of Power Unit ……………… 5-57
39) Removing Recoil Starter ……………… 5-59
40) Disassembly of Recoil Starter ………… 5-59
41) Inspection of Recoil Starter …………… 5-60
42) Installation of Recoil Starter …………… 5-61
6.Lower Unit
1 Special Tools ………………………… 6-2
2 Parts Layout …………………………… 6-4
Gear Case …………………………………… 6-4
Drive System & Water Pump ……………… 6-5
Shift ………………………………………… 6-7
3 Inspection Items …………………… 6-8
1) Draining Gear Oil ……………………… 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
… 6-10
7) Disassembly of Propeller Shaft Ass'y … 6-11
8) Inspection of Propeller Shaft ………… 6-11
9) Assembly of Propeller Shaft Ass'y …… 6-11
10)
Disassembly of Propeller Shaft Housing
… 6-12
11) Inspection of Propeller Shaft Housing… 6-13
12) Assembly of Propeller Shaft Housing … 6-14
13) Removing Pump Case (Lower) ……… 6-15
14) Disassembly of Pump Case (Lower) … 6-15
15) Assembly of Pump Case (Lower) …… 6-15
16) Removing Clutch Cam and Cam Rod… 6-15
17)
Disassembly of Clutch Cam and Cam Rod
… 6-15
18)
Inspection of Cam Rod and Clutch Cam
… 6-16
MFS25_30_ch00.qxd 06.3.10 2:33 PM ページ 4

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