Tohatsu MFS 9.8 A3 — inspection and Measurement of Engine Parts for Optimal Performance [42/84]

Содержание

• Top page p.1
• Chapter 1 specifications p.2
• Chapter 4 power unit p.2
• Chapter 3 inspection and maintenance p.2
• Chapter 2 service data and tools p.2
• Contents p.2
• Chapter 7 carburetor and fuel pump p.3
• Chapter 5 lower unit p.3
• Chapter 9 electrical system p.3
• Chapter 8 oil pump p.3
• Chapter 9 test run and inspection p.3
• Chapter 6 recoil starter p.3
• Contents p.3
• Engine p.4
• Specifications p.4
• Type 8a 9 a p.4
• Item model or p.4
• Dimensions p.4
• Chapter 1 specifications p.4
• Performance p.4
• Warning systems p.5
• Type 8a 9 a p.5
• Specifications p.5
• Lower unit p.5
• Item model or p.5
• Chapter 1 specifications p.5
• Dimensions p.6
• Chapter 1 specifications p.6
• Chapter 2 service data and tools p.7
• Service data and maintenance standards p.7
• Chapter 2 service data and tools p.8
• Chapter 2 service data and tools p.9
• Chapter 2 service data and tools p.10
• Chapter 2 service data and tools p.11
• Chapter 2 service data and tools p.12
• Chapter 2 service data and tools p.13
• Chapter 2 service data and tools p.14
• Table of points to apply sealants adhesives and lubricants p.15
• Chapter 2 service data and tools p.15
• Chapter 2 service data and tools p.16
• Chapter 2 service data and tools p.17
• Engine p.18
• Tightening torque p.18
• Table of tightening torque p.18
• N m kg m lb ft p.18
• Standard torque p.18
• Lower unit p.18
• Description bolt or nut thread p.18
• Chapter 2 service data and tools p.18
• 1 general tools p.19
• Tools and instruments required for disassembly and repair p.19
• Tools and instruments required for p.19
• Disassembly and repair p.19
• Chapter 2 service data and tools p.19
• Chapter 2 service data and tools p.20
• How to use special tools p.21
• Chapter 2 service data and tools p.21
• Chapter 2 service data and tools p.22
• Drive shaft bearing tool 3b2 72256 0 p.23
• Chapter 2 service data and tools p.23
• Chapter 2 service data and tools p.24
• Backlash measuring tool p.24
• Periodical inspections p.25
• O o o o p.25
• Chapter 3 inspection and maintenance p.25
• Troubleshooting p.26
• Method to change engine oil p.27
• Chapter 3 inspection and maintenance p.27
• Change of engine oil p.27
• Inspection of fuel system p.28
• Chapter 3 inspection and maintenance p.28
• Compression test p.29
• Chapter 3 inspection and maintenance p.29
• A caution p.29
• Chapter 3 inspection and maintenance p.30
• Inspection of timing belt p.31
• Chapter 3 inspection and maintenance p.31
• Chapter 3 inspection and maintenance p.32
• Change of gear oil p.32
• Chapter 3 inspection and maintenance p.33
• A caution p.33
• Flushing cleaning p.33
• Inspection of cooling system p.34
• Chapter 3 inspection and maintenance p.34
• General notes on service p.35
• Chapter 4 power unit p.35
• Removing parts p.36
• Removing power unit removing parts p.36
• Removing power unit p.36
• Chapter 4 power unit p.36
• Chapter 4 power unit p.37
• Disassembling engine p.38
• Chapter 4 power unit p.38
• Chapter 4 power unit p.39
• Chapter 4 power unit p.40
• Chapter 4 power unit p.41
• Chapter 4 power unit p.42
• Inspection and measurement of engine parts p.42
• Inspection and measurement of p.42
• Engine parts p.42
• Chapter 4 power unit p.43
• Chapter 4 power unit p.44
• Chapter 4 power unit p.45
• Chapter 4 power unit p.46
• Chapter 4 power unit p.47
• Chapter 4 power unit p.48
• Chapter 4 power unit p.49
• Repair and replacement of engine parts p.50
• Repair and replacement of engine p.50
• Chapter 4 power unit p.50
• Reassembling engine p.51
• Chapter 4 power unit p.51
• Chapter 4 power unit p.52
• Chapter 4 power unit p.53
• Chapter 4 power unit p.54
• Chapter 4 power unit p.55
• Chapter 4 power unit p.57
• Chapter 4 power unit p.58
• Chapter 4 power unit p.59
• Chapter 4 power unit p.60
• Chapter 5 lower unit p.61
• Disassembly of gear case p.61
• Disassembly of water pump case p.63
• Disassembly of propeller shaft and clutch p.63
• Chapters lower unit p.63
• Removal of cam rod drive shaft and bevel gear p.64
• Chapter 5 lower unit p.64
• Chapters lower unit p.65
• Chapters lower unit p.66
• Installation of clutch cam and cam rod p.66
• Installation of bevel gear and driveshaft p.66
• Gear case assembly p.66
• Chapters lower unit p.67
• Assembly of water pump case p.67
• Chapters lower unit p.68
• Assembly of propeller shaft and clutch p.68
• Standards for oil seals and o rings for gear case p.69
• Installation of gear case p.69
• Chapter 5 lower unit p.69
• Chapter 6 recoil starter p.71
• Recoil starter starter lock p.71
• Chapters recoil starter p.71
• Reassembling p.72
• Disassembling p.72
• Chapters recoil starter p.72
• Inspection p.73
• Chapters recoil starter p.73
• Chapter 7 carburetor and fuel pump p.74
• Carburetor p.74
• A caution p.74
• Fuel pump p.75
• Chapter 7 carburetor and fuel pump p.75
• A caution p.75
• Chapter 8 oil pump p.76
• Component parts p.76
• Chapter 9 electrical system p.77
• Rec reg p.77
• Mf type p.77
• Lg____lg p.77
• Lg b r r w w r p.77
• В black lue rown reen p.77
• Ef type p.77
• В black l blue bt brown g green grange p.77
• Wiring diagram p.77
• Br w brown with white tracer p.77
• Wire caldr p.77
• White yellow light green black with red tracer red with white tracer white with red tracer p.77
• White yellow light green black with red p.77
• W r w r p.77
• W r v r p.77
• Tracer p.77
• Red with white tracer white with red tracer p.77
• Or orange p.77
• Note including optional parts in the diagram p.77
• Inspection p.78
• Ep type p.78
• Chapter 9 electrical system p.78
• Condition of the above measurement hioki 3030 tester was used with the measurement range of 1 kq p.79
• Chapter 9 electrical system p.79
• Tolerance of resistance 20 p.79
• The values shown in the above table are just standards and it is impossible to check each value accurately p.79
• Tester s positive terminals p.79
• Tester s negative terminals p.79
• Since the value marked with con is the capacitor characteristic the tester reads a stable value shown in parentheses p.79
• Oo marked with con indicates a minute value because the tester pointer shakes a little for this item p.79
• Before measuring the item marked with con make a shortcircuit between the ignition terminal and earth terminal p.79
• After the tester pointer shakes once p.79
• Chapter 9 electrical system p.80
• Chapter 9 electrical system p.81
• Ф c d unit 2 rectifier fuse cord chock solenoid starter solenoid stop switch p.81
• Ep type cable harness wiring diagram p.81
• Test tank and test propeller p.82
• Inspection p.82
• Chapter 10 test run and inspection p.82
• Idle speed and stable idling p.83
• Off the lamp goes out as the engine starts p.83
• Note perform a break in of the engine according to the following standards p.83
• Items to be checked during test run p.83
• Inlet exhaust valve etc is replaced perform a break in of the engine for fitting the sliding surfaces p.83
• Fuel leak from parts joined spots of the engine p.83
• Extraordinary noise p.83
• Engine speed at acceleration and deceleration p.83
• Cooling water discharge condition cooling water must vigorously be discharged from the water inspection p.83
• While idling the engine check the following items p.83
• Cooling water and or oil leak from parts joined spots of the engine p.83
• When any of the piston piston ring piston pin crank shaft connecting rod cylinder cam shaft rocker arm p.83
• Check the tightening condition of respective bolts and nuts after test run and additionally tighten them with the p.83
• Specified tightening torque p.83
• Chapter 10 test run and inspection p.83
• Operation of the stop switch p.83
• Break in period 10 hours p.83
• Operation of the clutch p.83
• Break in p.83
• On the lamp goes on when the lead wire of the oil pressure switch is grounded to the body p.83
• Additional tightening after test run p.83
• On off operation of the engine oil warning lamp p.83
• Tomatsu corporation p.84
• Back cover p.84

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CHAPTER 4 POWER UNIT 5 Inspection and Measurement of Engine Parts 1 Measurement with vernier calipers Valve seat width Standard value Out of the limit to use 1 0 mm 0 0394 in If 2 0 mm 0 0787 in or more it needs replacement or repair Valve spring free length Out of the limit to use Standard value 35 mm 1 38 in If 33 5 mm 1 32 in or less it needs replacement 2 Measurement with micrometer Outer diameter of piston skirt Standard value 54 960 mm 2 1638 in Out of the limit to use If 54 90 mm 2 1614 in or less it needs replacement Piston clearance Clearance between piston and cylinder Out of the limit to use Standard value 0 020 0 055 mm 0 0008 0 0022 in If 0 15 mm 0 0059 in or more it needs replacement Outer diameter of piston pin Standard value Out of the limit to use 14 00 mm 0 5512 in If 13 97 mm 0 5500 in or less it needs replacement 39

Learn essential techniques for inspecting and measuring engine parts, including valve seats, springs, pistons, and clearances to ensure optimal engine performance and longevity.