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Yamaha 25 NMHOS [173/245] 8 7 6 5 4 3 2 1
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69R3J11
6-28
9
8
7
6
5
4
3
2
1
NOTE:
While turning the drive shaft clockwise 5–6
times so that the forward gear taper roller
bearing is seated evenly tighten the center
bolt 3 to specified torque.
4. Install the backlash indicator onto the
drive shaft (16.0 mm [0.63 in] in diame-
ter), then the dial gauge onto the lower
unit as shown.
NOTE:
Install the dial gauge so that the plunger a
contacts the mark b on the backlash indica-
tor.
Bearing housing puller claw S 1:
90890-06564
Stopper guide plate 2:
90890-06501
Center bolt 3:
90890-06504
5. While pushing the drive shaft slightly, turn
the drive shaft slowly clockwise and
counterclockwise, then measure the
backlash when the drive shaft stops in
each direction.
6. Add or remove shim(s) if out of specifica-
tion.
M: Measurement
7. Remove the special service tools from
the propeller shaft and drive shaft.
8. Apply a load to the reverse gear by
installing the propeller 8 without the
spacer 9 , then install the collar 0,
washer q and propeller nut w as shown.
Center bolt 3:
5 N·m (0.5 kgf·m, 3.7 ft·lb)
69R60325
5
6
7
a
b
4
Backlash indicator 4: 90890-06706
Magnet base plate 5: 90890-07003
Dial gauge set 6: 90890-01252
Magnet base B 7: 90890-06844
Forward gear backlash:
0.31–0.72 mm
(
0.0122–0.0283
in)
Forward gear
Shim thickness
backlash
Less than To be decreased by
0.31 mm (0.0122 in) (0.51 – M) × 0.49
More than To be increased by
0.72 mm (0.0283 in) (M – 0.51) × 0.49
Available shim thicknesses:
1.0, 1.1, 1.2, 1.3 and 1.4 mm
8
9
q
w
0
6S660260
Shimming / Backlash
69R3J11_06 06.7.6 11:37 Page 29
Содержание
- E 25b 25x e 30h 1
- English 1
- R 28197 3j 11 1
- Service manual 1
- Important information 2
- Notice 2
- Bracket unit 3
- Contents 3
- Electrical system 3
- Fuel system 3
- General information 3
- Lower unit 3
- Periodic check and adjustment 3
- Power unit 3
- Specification 3
- Troubleshooting 3
- 8 7 6 5 4 3 2 1 5
- Gen info 5
- General information 5
- Caution 6
- Disassembling the drive shaft 6
- Disassembling the forward gear 6
- Gen info 6
- How to use this manual 6
- Lower unit 6
- Manual format 6
- Removing the drive shaft 6
- 8 7 6 5 4 3 2 1 7
- Chk adj lowr trbl shtg 7
- Fuel brkt 7
- Gen info 7
- Spec powr elec 7
- Symbol 7
- Abbreviation 8
- Gen info 8
- 8 7 6 5 4 3 2 1 9
- Fire prevention 9
- Part lubricant and sealant 9
- Safety while working 9
- Self protection 9
- Ventilation 9
- Disassembly and assembly 10
- Gen info 10
- Good working practice 10
- 8 7 6 5 4 3 2 1 11
- Identification 11
- Serial number 11
- Digital caliper 90890 06704 12
- Gen info 12
- General information 12
- Needle bearing attachment 90890 06607 90890 06611 90890 06613 90890 06615 90890 06632 90890 06633 90890 06653 12
- Special service tool 12
- Vacuum pressure pump gauge set 90890 06756 12
- 8 7 6 5 4 3 2 1 13
- Gen info 14
- 8 7 6 5 4 3 2 1 15
- Gen info 16
- 8 7 6 5 4 3 2 1 17
- Checking the fuel system 18
- Gen info 18
- Predelivery check 18
- Propeller selection 18
- Propeller size 18
- Selection 18
- 8 7 6 5 4 3 2 1 19
- Checking the battery wh w wc 19
- Checking the gear oil 19
- Checking the outboard motor mounting height 19
- Checking the remote control cable w wc 19
- Checking the steering system 20
- Gen info 20
- 8 7 6 5 4 3 2 1 21
- Checking the engine start button engine start switch and engine stop lanyard switch 21
- Checking the gear shift and throttle operation 21
- Break in 22
- Checking the cooling water pilot hole 22
- Gen info 22
- Test run 22
- 8 7 6 5 4 3 2 1 23
- After test run 23
- 8 7 6 5 4 3 2 1 25
- Specification 25
- General specification 26
- 8 7 6 5 4 3 2 1 27
- 8 7 6 5 4 3 2 1 29
- 8 7 6 5 4 3 2 1 31
- 8 7 6 5 4 3 2 1 33
- Maintenance specification 34
- Power unit e25bmh 25xmh models 34
- 8 7 6 5 4 3 2 1 35
- Electrical e25bmh 25xmh models 36
- Lower unit e25bmh 25xmh models 36
- 8 7 6 5 4 3 2 1 37
- Power unit 25bmh 25bw 25bwc models 38
- 8 7 6 5 4 3 2 1 39
- Electrical 25bmh 25bw 25bwc models 40
- Lower unit 25bmh 25bw 25bwc models 40
- 8 7 6 5 4 3 2 1 41
- 8 7 6 5 4 3 2 1 43
- Power unit e30hmh 30hmh 30hwh models 43
- 8 7 6 5 4 3 2 1 45
- Electrical e30hmh 30hmh 30hwh models 45
- Lower unit e30hmh 30hmh 30hwh models 45
- 8 7 6 5 4 3 2 1 47
- Power unit 30hw 30hwc models 48
- 8 7 6 5 4 3 2 1 49
- Electrical 30hw 30hwc models 50
- Lower unit 30hw 30hwc models 50
- 8 7 6 5 4 3 2 1 51
- 8 7 6 5 4 3 2 1 53
- Dimension 53
- Exterior e25bmh 25xmh 25bmh 25bwc e30hmh 30hmh 30hwh 30hwc 53
- Maintenance specification 53
- Exterior 25bw 30hw 54
- Specification 54
- 8 7 6 5 4 3 2 1 55
- Clamp bracket 55
- Maintenance specification 55
- Specified torque 56
- Tightening torque 56
- 8 7 6 5 4 3 2 1 57
- General torque 57
- 8 7 6 5 4 3 2 1 59
- Chk adj 59
- Periodic check and adjustment 59
- Chk adj 60
- Maintenance interval chart 60
- 8 7 6 5 4 3 2 1 61
- Checking the fuel filter 61
- Checking the fuel joint and fuel hose fuel tank to carburetor 61
- Checking the top cowling 61
- Fuel system 61
- Top cowling 61
- Checking the spark plug 62
- Checking the thermostat 62
- Chk adj 62
- Power unit 62
- 8 7 6 5 4 3 2 1 63
- Adjusting the throttle cable wh wc mh 63
- Checking the cooling water passage 63
- Control system 63
- Adjusting the throttle cable w wc 64
- Chk adj 64
- 8 7 6 5 4 3 2 1 65
- Adjusting the throttle control lever link 66
- Checking the ignition timing 66
- Chk adj 66
- 8 7 6 5 4 3 2 1 67
- Adjusting the ignition timing 68
- Chk adj 68
- 8 7 6 5 4 3 2 1 69
- Checking the engine idle speed 69
- Checking the gear shift operation 70
- Chk adj 70
- 8 7 6 5 4 3 2 1 71
- Adjusting the start in gear protec tion 71
- Checking the choke solenoid opera tion w 71
- Checking the neutral switch opera tion wh wc 71
- Checking the start in gear protec tion 71
- Bracket 72
- Checking the tilt operation 72
- Chk adj 72
- 8 7 6 5 4 3 2 1 73
- Changing the gear oil 73
- Checking the gear oil level 73
- Checking the tilt pin 73
- Lower unit 73
- Checking the anode 74
- Checking the lower unit for air leak age 74
- Checking the propeller 74
- Chk adj 74
- General 74
- 8 7 6 5 4 3 2 1 75
- Checking the battery wh w wc 75
- Chk adj 76
- Lubricating the outboard motor 76
- 8 7 6 5 4 3 2 1 79
- Fuel system 79
- Fuel system 80
- Hose routing 80
- 8 7 6 5 4 3 2 1 81
- Fuel line 81
- Hose routing fuel line 81
- Fuel pump 82
- Fuel system 82
- 8 7 6 5 4 3 2 1 83
- Checking the fuel joint 83
- Checking the primer pump 83
- Checking the fuel pump 84
- Disassembling the fuel pump 84
- 8 7 6 5 4 3 2 1 85
- Assembling the fuel pump 85
- Carburetor 86
- Fuel system 86
- 8 7 6 5 4 3 2 1 87
- Carburetor 87
- Fuel system 88
- 8 7 6 5 4 3 2 1 89
- Checking the carburetor 89
- Checking the float height 89
- Disassembling the carburetor 89
- Assembling the carburetor 90
- 8 7 6 5 4 3 2 1 91
- Power unit 92
- 8 7 6 5 4 3 2 1 93
- Checking the compression pressure 94
- Power unit 94
- 8 7 6 5 4 3 2 1 95
- Power unit 95
- Power unit 96
- 8 7 6 5 4 3 2 1 97
- Checking the starter rope 97
- Disassembling the manual starter 97
- Assembling the manual starter 98
- Checking the drive pawl 98
- Checking the spiral spring 98
- Measuring the starter rope 98
- 8 7 6 5 4 3 2 1 99
- Power unit 100
- 8 7 6 5 4 3 2 1 101
- Power unit 101
- Power unit 102
- 8 7 6 5 4 3 2 1 103
- Power unit 103
- Power unit 104
- 8 7 6 5 4 3 2 1 105
- Power unit 105
- Power unit 106
- 8 7 6 5 4 3 2 1 107
- Removing the power unit 107
- 8 7 6 5 4 3 2 1 109
- Removing the flywheel magnet 109
- Removing the electrical component 110
- 8 7 6 5 4 3 2 1 111
- E25b 25b 111
- Intake manifold 111
- Power unit intake manifold 111
- E25b 25b 112
- Power unit 112
- 8 7 6 5 4 3 2 1 113
- Removing the reed valve assembly 113
- Checking the reed valve 114
- 8 7 6 5 4 3 2 1 115
- Cylinder head exhaust cover 115
- Intake manifold cylinder head exhaust cover 115
- Power unit 116
- 8 7 6 5 4 3 2 1 117
- Cyilnder head exhaust cover 117
- Removing the cylinder head 118
- 8 7 6 5 4 3 2 1 119
- Checking the cylinder head 119
- Checking the exhaust cover 119
- Removing the exhaust cover 119
- Crankcase 120
- Power unit 120
- 8 7 6 5 4 3 2 1 121
- Crankcase 121
- Power unit 122
- 8 7 6 5 4 3 2 1 123
- Checking the cylider block 123
- Disassembling the piston 123
- Removing the crankcase 123
- Removing the crankshaft assembly and oil seal housing 123
- Checking the cylinder bore 124
- Checking the piston diameter 124
- Checking the piston ring 124
- 8 7 6 5 4 3 2 1 125
- Checking the piston pin boss bore 125
- Checking the piston ring side clear ance 125
- Checking the piston pin 126
- Disassembling the crankshaft assembly 126
- 8 7 6 5 4 3 2 1 127
- Checking the crankpin 128
- 8 7 6 5 4 3 2 1 129
- Assembling the crankshaft assem bly 129
- 8 7 6 5 4 3 2 1 131
- 8 7 6 5 4 3 2 1 133
- Checking the crankshaft 134
- 8 7 6 5 4 3 2 1 135
- Assembling the oil seal housing 135
- Assembling the piston 135
- Checking the oil seal housing 135
- Disassembling the oil seal housing 135
- Assembling the power unit 136
- 8 7 6 5 4 3 2 1 137
- 8 7 6 5 4 3 2 1 139
- Installing the electrical component 139
- 8 7 6 5 4 3 2 1 141
- Installing the power unit 141
- 8 7 6 5 4 3 2 1 143
- 8 7 6 5 4 3 2 1 145
- Lower unit 145
- Lower unit 146
- 8 7 6 5 4 3 2 1 147
- Lower unit 147
- Lower unit 148
- 8 7 6 5 4 3 2 1 149
- Lower unit 149
- Removing the lower unit 150
- 8 7 6 5 4 3 2 1 151
- Removing the water pump and shift rod 151
- Assembling the oil seal housing 152
- Checking the water pump and shift rod 152
- Disassembling the oil seal housing 152
- 8 7 6 5 4 3 2 1 153
- Lower unit propeller shaft housing 153
- Propeller shaft housing 153
- Disassembling the propeller shaft assembly 154
- Disassembling the propeller shaft housing 154
- Removing the propeller shaft hous ing assembly 154
- 8 7 6 5 4 3 2 1 155
- Checking the propeller shaft 155
- Checking the propeller shaft hous ing 155
- Checking the reverse gear 155
- Assembling the propeller shaft housing 156
- 8 7 6 5 4 3 2 1 157
- Assembling the propeller shaft assembly 157
- Drive shaft and lower case 158
- Lower unit 158
- 8 7 6 5 4 3 2 1 159
- Disassembling the drive shaft 159
- Removing the drive shaft 159
- Checking the drive shaft 160
- Checking the pinion and forward gear 160
- Disassembling the forward gear 160
- Disassembling the lower case 160
- 8 7 6 5 4 3 2 1 161
- Assembling the drive shaft 161
- Assembling the forward gear 161
- Assembling the lower case 161
- Checking the lower case 161
- Installing the drive shaft 162
- 8 7 6 5 4 3 2 1 163
- Installing the propeller shaft hous ing 163
- Installing the shift rod 163
- Installing the water pump 164
- 8 7 6 5 4 3 2 1 165
- Installing the lower unit 165
- 8 7 6 5 4 3 2 1 167
- Shimming 168
- 8 7 6 5 4 3 2 1 169
- Selecting the pinion shim 169
- Shimming 169
- Selecting the forward gear shim 170
- 8 7 6 5 4 3 2 1 171
- Selecting the reverse gear shim 171
- Backlash 172
- Measuring the forward and reverse gear backlash 172
- 8 7 6 5 4 3 2 1 173
- 8 7 6 5 4 3 2 1 175
- Bracket unit 175
- Bracket unit 176
- Tiller handle 176
- 8 7 6 5 4 3 2 1 177
- Tiller handle 177
- Disassembling the tiller handle 178
- 8 7 6 5 4 3 2 1 179
- Assembling the tiller handle 179
- Checking the tiller handle 179
- 8 7 6 5 4 3 2 1 181
- Bottom cowling 181
- Tiller handle bottom cowling 181
- Bracket unit 182
- 8 7 6 5 4 3 2 1 183
- Bottom cowling shift actuator 183
- Shift actuator 183
- Bracket unit 184
- 8 7 6 5 4 3 2 1 185
- Disassembling the shift actuator 185
- Removing the shift actuator 185
- Assembling the shift actuator 186
- Checking the shift actuator 186
- 8 7 6 5 4 3 2 1 187
- Installing the shift actuator 187
- 8 7 6 5 4 3 2 1 189
- Shift actuator upper case 189
- Upper case 189
- Bracket unit 190
- 8 7 6 5 4 3 2 1 191
- Disassembling the upper case 191
- Removing the upper case 191
- Checking the upper case 192
- 8 7 6 5 4 3 2 1 193
- Assembling the upper case 193
- Installing the upper case 194
- 8 7 6 5 4 3 2 1 195
- Pivot shaft 195
- Upper case pivot shaft 195
- Checking the pivot shaft 196
- Installing the pivot shaft 196
- 8 7 6 5 4 3 2 1 197
- Clamp bracket swivel bracket 197
- Pivot shaft clamp bracket swivel bracket 197
- Wh w wc 197
- Bracket unit 198
- Wh w wc 198
- 8 7 6 5 4 3 2 1 199
- Clamp bracket swivel bracket 199
- Disassembling the bracket 200
- 8 7 6 5 4 3 2 1 201
- Assembling the swivel bracket 201
- Checking the bracket 201
- 8 7 6 5 4 3 2 1 203
- 8 7 6 5 4 3 2 1 205
- Electrical system 205
- Checking the electrical component 206
- Measuring the peak voltage 206
- 8 7 6 5 4 3 2 1 207
- Electrical component 207
- Starboard view 207
- 4 4 5 7 208
- Bw 30hw 208
- Electrical system 208
- 8 7 6 5 4 3 2 1 209
- E25bmh 25bmh 25xmh e30hmh 30hmh 209
- Electrical component 209
- Checking the ignition spark gap 210
- Checking the spark plug cap with resister type 210
- Ignition and ignition control sys tem 210
- 8 7 6 5 4 3 2 1 211
- Checking the ignition coil 211
- Checking the spark plug cap 211
- Checking the cdi unit 212
- 8 7 6 5 4 3 2 1 213
- E 25b e 30h 213
- Ignition and ignition control system 213
- Checking the charge coil 214
- Checking the pulser coil 214
- 8 7 6 5 4 3 2 1 215
- Checking the thermoswitch w 215
- Checking the engine start button wh wc 216
- Checking the engine start switch w 216
- Checking the fuse wh w wc 216
- Starting system 216
- 8 7 6 5 4 3 2 1 217
- Checking the engine stop button wc 217
- Checking the engine stop lanyard switch 217
- Checking the choke solenoid conti nuity w 218
- Checking the neutral switch continu ity wh wc 218
- Checking the starter relay wh w wc 218
- 8 7 6 5 4 3 2 1 219
- Starter motor wh w wc 219
- Starting system starter motor wh w wc 219
- Electrical system 220
- 8 7 6 5 4 3 2 1 221
- Checking the armature 221
- Checking the starter motor pinion 221
- Removing the starter motor pinion 221
- Checking the brush 222
- Checking the starter motor opera tion 222
- 8 7 6 5 4 3 2 1 223
- Charging system 223
- Checking the lighting coil 223
- Checking the rectifier wh w wc 223
- Troubleshooting 225
- Trbl shtg 226
- Troubleshooting the power unit 226
- 8 7 6 5 4 3 2 1 227
- Trbl shtg 228
- 8 7 6 5 4 3 2 1 229
- Trbl shtg 230
- 8 7 6 5 4 3 2 1 231
- Troubleshooting the lower unit 231
- 8 7 6 5 4 3 2 1 233
- B black br brown g green l blue r red w white b o black orange b w black white g w green white w b white black w r white red 237
- Color code 237
- Spark plug 2 ignition coil 3 cdi unit 4 charge coil 5 pulser coil 6 lighting coil 7 engine stop lanyard switch 8 rectifier regulator 25bmh 30hmh option 9 2p connector 25bmh 30hmh option 237
- Wd30hwh 06 20 38 page 3 237
- Wiring diagram e 25bmh 25xmh e 30hmh 237
- Color code 238
- E 25b 25x e 30h 239
- R 28197 3j 11 239
- Service manual 239
- Rcwd02 240
- Wiring diagram 30hwh 240
- Bw 30hw 241
- Color code 241
- Bw 30hw 242
- Rcwd03 242
- Wiring diagram 25bw 30hw 242
- Bwc 30hwc 243
- Color code 243
- Bwc 30hwc 244
- Rcwd05 244
- Wiring diagram 25bwc 30hwc 244
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