Briggs & Stratton 250000 Specifiche Pagina 18
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12
TUNE-UP PROCEDURE
A “Tune-Up,” as listed below, would normally be performed on relatively new engines brought in for minor difficulties.
Performing these steps will either assure that the engine is functioning properly or will point out necessary repairs.
These steps are also covered in the Overhaul Procedure and will normally be performed as a part of the complete
overhaul.
STEP NO.
1. Remove spark plug lead from spark plug.
2. Remove air cleaner.
3. Check oil level and drain. (Clean fuel tank and lines if separate from carburetor.)
4. Remove blower housing, inspect rope and rewind assembly and starter clutch if equipped.
5. Clean cooling fins and entire engine.
6. Rock flywheel counterclockwise to check compression or do cylinder leakage test.
7. Remove carburetor, disassemble and inspect for wear or damage. Wash in solvent, replace parts as
necessary and assemble. Set initial adjustment.
8. Inspect crossover tube or intake elbow for damaged gaskets.
9. Check air vane governor blade, linkage and spring for damage or wear.
10. Remove flywheel, check for oil seal leakage, both flywheel and PTO sides. Check flywheel key.
11. Check armature, inspect all wires for breaks or damaged insulation. Be sure lead wires do not touch
flywheel. Check stop switch and lead.
12. Install flywheel. Time engine if necessary. Set air gap. Check for spark with #19051 or 19368 tester.
13. Remove cylinder head, check gasket, remove spark plug, and clean carbon. Inspect valves for proper
seating.
14. Replace cylinder head. Torque to specifications, set spark plug gap or replace plugs if necessary.
15. Replace oil and fuel, check muffler for restrictions or damage.
16. Adjust remote control linkage and cable (if used), for correct operation.
17. Service air cleaner. Check gaskets and element for damage.
18. Run and adjust mixture and top speed.
- CHECK CHART 2
- SECTION 1 7
- General Information 7
- WARNING: 8
- SAE VISCOSITY GRADES 11
- Gasoline Engines 11
- Kerosene Engines 11
- Engine Oil 11
- CLEAN COOLING SYSTEM 13
- AIR CLEANERS 13
- Crankshaft (Typical, Fig. 13) 16
- (Typical, Figs. 14, 15, 16) 16
- TUNE-UP PROCEDURE 18
- STEP NO 18
- CHECK-UP 19
- Check Compression 19
- Check Ignition 19
- Revised 5/03 21
- SECTION 2 23
- Ignition 23
- BRIGGS & STRATTON 24
- IGNITION SYSTEM 24
- CHECK IGNITION 24
- Check For Spark Miss 24
- Remove Flywheel 26
- Cast Iron Flywheel 26
- Model Series 280000 26
- MAGNETRONr IGNITION SYSTEM 28
- Identification 28
- Disconnect Stop Switch Wire 28
- Remove Magnetronr Module 28
- Stationary Stop Switch 31
- Location 31
- RUN Position 31
- SECTION 3 39
- Carburetion 39
- CARBURETOR IDENTIFICATION 41
- FLO-JET CARBURETORS 41
- : Choke-A-Matic lever 42
- TANK MOUNTED CARBURETORS 43
- BEFORE REMOVAL OF CARBURETOR 44
- High Altitude Compensation 46
- Assemble Bimetal Spring 58
- Choke-A-Matic 58
- Model Series 92000 58
- Pre-Load Diaphragm 60
- Pulsa-Jet 60
- Model Series 113900 60
- Type #2999 60
- Model Series 63
- Remove Carburetor 66
- (Pulsa-Jet and Vacu-Jet) 66
- Disassemble Carburetor 66
- Remove Needle Valve and Seat 67
- Assemble Carburetor 70
- PULSA-JET LOW EMISSION 71
- CARBURETORS: 71
- Rotary Choke (Pulsa-Jet) 71
- Slide Choke 71
- Manual Choke 72
- Install Spiral 72
- Cast Throttle Shaft 72
- Stamped Throttle Shaft 72
- Final Adjustment 76
- Choke Shafts 78
- (LMS, LMT) 78
- Remove Fuel Inlet Seat 79
- Fig. 103 80
- Fig. 104 80
- Fig. 105 80
- Fig. 106 80
- Install Welch Plug 81
- Install Fuel Inlet Seat 81
- Viton Seat 81
- Replaceable Metal Seat 81
- Install Choke Shaft and Plate 82
- LMS Models 82
- (Return Spring on Lever) 82
- (Return Spring on Shaft) 82
- (Manual Choke, Typical) 82
- LMT Models 83
- (Metal Choke Shaft and Plate) 83
- Install Throttle Shaft 83
- Fig. 116 84
- Fig. 117 84
- Fig. 118 84
- Fig. 119 85
- Fig. 120 85
- TWO-PIECE AND CROSSOVER) 86
- ONE-PIECE FLO-JET 86
- TWO-PIECE FLO-JET 87
- (SMALL, MEDIUM AND LARGE) 87
- CROSS-OVER FLO-JET HORIZONTAL 88
- CRANKSHAFT ENGINES 88
- Small One-Piece Flo-Jet 88
- Large One-Piece Flo-Jet 89
- Disassemble Two-Piece Flo-Jet 90
- Inspection 90
- Check Throttle Shaft and 91
- Bushings for Wear 91
- Threaded Type 92
- Repair Carburetor 92
- Install Float 93
- Check Float Level 93
- Assemble One-Piece Flo-Jet 93
- Assemble Two-Piece Flo-Jet 93
- Assemble Cross-Over Flo-Jet 94
- Adjust Carburetor – All 95
- Initial Adjustment 95
- (Two-Piece Flo-Jet) 96
- Remote Throttle Control 96
- Two Piece Flo-Jet 96
- Fuel Pumps 97
- (Crankcase Vacuum Operated) 97
- Operation 98
- Service Plastic Body Pump 99
- Disassemble Fuel Pump 99
- Inspect Fuel Pump 99
- Assemble Pump 99
- Service Metal Body Pump 99
- KEROSENE ENGINES 100
- 135400, 13K400 and 19K400 100
- SPECIFICATION TABLES 101
- Fig. 162 102
- SECTION 4 109
- Flywheel Brakes 109
- Horizontal Crankshaft 110
- Vertical Crankshaft 111
- CONTROLS 113
- 82200 Horizontal Crankshaft 114
- Crankshaft, Air Vane Governor 116
- Choke-A-Matic, Fig. 33 117
- Fig. 41 Fig. 42 119
- Fig. 43 Fig. 44 119
- Fig. 45 Fig. 46 119
- as shown (A), to increase 124
- linkage and cable as shown 125
- Fig. 72 Fig. 73 125
- Thumb Nut Adjustment 126
- Governed Idle 126
- Fig. 80 Fig. 81 127
- Fig. 82 Fig. 83 127
- Fig. 84 Fig. 85 128
- Fig. 100 130
- Model Series 100900, 130900 131
- Fig. 106 Fig. 107 132
- Fig. 108 133
- Fig. 109 133
- Fig. 110 133
- Fig. 111 133
- Fig. 112 Fig. 113 134
- Fig. 114 Fig. 115 134
- BAND BRAKE CONTROLS 135
- Model Series 92000, 93000 135
- 94000, 95000, 110000 135
- REMOVE BAND BRAKE 136
- ASSEMBLE CONTROL BRACKET AND 136
- BAND BRAKE 136
- Adjusting Band Brake 136
- TEST BAND BRAKE 137
- FINAL ASSEMBLY 137
- (System 4 137
- Fig. 124 138
- Fig. 125 138
- Fig. 126 138
- Assemble Flywheel Brake 139
- SECTION 5 141
- Governors 141
- Section Contents, Cont’d 142
- PNEUMATIC GOVERNORS 142
- MECHANICAL GOVERNORS 142
- VERTICAL CRANKSHAFT 142
- Replace Governor Spring 146
- Model Series 90000, 110000 146
- Assemble 149
- Adjust Top No Load Speed 149
- Governor Spring Location 150
- Model Series 93400 150
- Model Series 133400 150
- Single Spring 152
- 196400, 250400, 256400 152
- Adjust Governed Idle 155
- Rack and Pinion Control 155
- Governed Idle (Non-Generator) 157
- Generator Applications Only 157
- 250000, 280000 160
- MODEL SERIES 120000 (Fig. 48) 162
- Disassemble Governor 162
- Assemble Governor 162
- Fig. 53 Fig. 54 164
- Fig. 60 Fig. 61 165
- Vertical Slide 166
- Swivel Control 166
- Adjust Governed Idle Stop 167
- SECTION 6 171
- Compression 171
- Compression Test 172
- (81 Nm) if the 172
- (49.2 KG/cm 172
- Cylinder Head Assembly and 173
- Torque Procedure 173
- Remove Valves 173
- Reface Valves and Seats 174
- (7.92 mm) Valve Guides 177
- VALVE SEAT INSERT REPLACEMENT 178
- Remove Valve Seat Insert 179
- Install Valve Seat Insert 179
- Valve Conversions 180
- Installation 180
- Cast Iron Cylinder Models 180
- , 94000, 95000, 96000 184
- SECTION 7A 189
- Rewind Starters 189
- Rewind starter identification 190
- Fig. 1: Old Style 190
- Fig. 3: Model Series 100700 190
- Remove Rope or Spring 192
- Install Spring 192
- Wind Spring 192
- Install Rope 193
- Old Style with Guide Lug 193
- Replace Rewind Assembly 194
- (For Engines 5 HP & Up) 194
- Model Series 100700 Starter 196
- Disassemble 196
- Remove Rope 199
- Inspect Rope 199
- Remove Pulley And Spring 199
- Assemble Starter 200
- Install Pulley and Spring 200
- Assembly 200
- VERTICAL PULL STARTER 204
- DISASSEMBLE 204
- SECTION 7B 209
- Electric Starter Systems 209
- Checking Battery 213
- Installation: 214
- Cranks Engine Slowly 214
- TEST PROCEDURES, BY SYSTEM 215
- System 3 215
- , System 4 215
- Starter Switch Test 217
- Test Interlock Switch 217
- Model Series 120000 217
- MODEL SERIES 130000 Test 219
- Tools, Procedure 219
- CAUTION: 219
- Disassemble Control Assembly 222
- Test Rectifier (Grounded) 223
- Tools, Procedures (AC) 225
- CAUTION, ALL SYSTEMS: 226
- (Typical, 12v and 120v) 226
- Replace Flywheel Ring Gear 227
- (Typical, all systems) 227
- Starter Motor 228
- Cap Assembly, Fig. 37 230
- Pinion Gear 231
- Model Series 130000 231
- Disassemble Starter Motor 232
- Assemble Starter Motor 233
- ” (6.0 mm), they 235
- Install Clutch 238
- C-Ring Retainer 241
- 1/8” (3.0 mm) 242
- C-Ring Retainer Type 243
- Roll Pin Retainer Type 244
- ” (111.0 mm) and 4–9/16” 245
- (115.9 mm) Housings 246
- (111.0 mm) and 246
- (115.0 mm) Housings 246
- SECTION 7C 251
- Alternators 251
- TEST EQUIPMENT 252
- Single Cylinder Engine Models 253
- TABLE NO. 1 253
- AC Only Alternator (Fig. 7) 256
- TROUBLESHOOTING 258
- Equipment To Test Alternators 258
- Digital Multimeter 258
- Test AC Voltage Output 260
- Replace Defective Stator 261
- 1-1/2 Amp Alternator 261
- Used on Model Series 130000 261
- Before Date Code 91032500 261
- Rectifier (Diode) Test 262
- DC Only Alternator Test 263
- Tri-Circuit Alternator Test 263
- Attach BLACK 263
- Quad Circuit Alternator 264
- Test Charging Circuit (DC+) 264
- Test Lighting Circuit (DC–) 265
- Testing Regulator-Rectifier 265
- Test Regulator-Rectifier 266
- 10 Amp System 266
- 16 Amp System 267
- Replacing Rectifier 267
- Suggested Wiring Diagrams 268
- SPECIFICATIONS 269
- SECTION 8 275
- Lubrication 275
- BREATHER 277
- Checking Breathers 277
- LUBRICATION SYSTEMS 278
- Splash Lubrication 278
- Alloy Engines 279
- OIL GARD 279
- TROUBLESHOOTING OIL GARD 280
- SYSTEMS 280
- PROBLEM LETTER CAUSE CURE 280
- SECTION 9 283
- Pistons – Rings – Rods 283
- Piston Without Notch on Head 286
- Piston With Notch on Head 286
- Install Piston Rings 286
- Illust. 1 Illust. 2 287
- Install Piston Assembly 288
- (Without Notch On Head) 288
- (With Notch On Head) 288
- SECTION 10 291
- Crankshafts, Cam Gears 291
- CHECK CRANKSHAFT 294
- All Engines 294
- Check Cam Gear – All Engines 294
- Checking Compression Release 294
- (Mechanical Yoke Type) 294
- Model Series 111200, 111900 295
- BALL BEARINGS 295
- All Aluminum Model Series 296
- Fig. 16 297
- Ball Bearing 298
- Model Series 300000, 320000 298
- Check Cam Gear End Play 298
- Install Crankshaft 298
- Fill Gear Case with Lubricant 302
- Fig. 34 – Removing Gear Case 303
- ASSEMBLE 304
- Model Series 230000 305
- Clockwise PTO Rotation 305
- Drain and Disassemble 305
- Install Gear Case Assembly 307
- Fig. 55 – Check Cam Gear 310
- Inspect Parts 311
- Remove Control Lever Shaft 312
- Assemble Control Lever and 312
- Shaft Assembly 312
- Cylinder Clip Washer 313
- DIMENSIONS 315
- Crankshaft Throw 315
- SECTION 11 319
- Cylinders & Bearings 319
- INSPECTION 320
- All Models 320
- RESIZING CYLINDER BORE 320
- Set Up For Honing 321
- Hone Cylinder 321
- Check Cam Gear Bearing 323
- CASE COVER BEARINGS 323
- Aluminum Cylinder Engines 323
- Repair Procedure 324
- Install Bushing, Cylinder 324
- (Steel Backed Aluminum NLA) 324
- Install Bushing, Sump 325
- (Steel Backed Aluminum) 325
- REPLACE OIL SEAL 327
- TABLE NO. 6 330
- SECTION 12 333
- Synchro-Balance and 333
- Oscillating Counter Balance 333
- ASSEMBLE AND TIME ROTATING 334
- SYNCHRO-BALANCE 334
- HORIZONTAL 334
- CRANKSHAFT CAST IRON ENGINES 334
- Time Counterweight 335
- ROTATING COUNTERBALANCE 335
- HORIZONTAL CRANKSHAFT 335
- MODEL SERIES 250000 335
- Assemble Counterweights 335
- Time Counterweights Gears 336
- Inspect Counterbalance System 337
- Crankshaft 337
- Model Series 338
- Eccentric Bearing 338
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