xviii
S E C T I O N 4
Engine Service
C H A P T E R 1 3
Preventive Maintenance
and Troubleshooting. . . . . . . 235
Preventive Maintenance . . . . . . . . . . . 235
Engine Cleaning . . . . . . . . . . . . . . . . . . . . . . . .235
Checking Oil Level and Condition . . . . . . . .236
Changing Oil . . . . . . . . . . . . . . . . . . . . . . . . . . .237
Lubricating Cables and Linkage. . . . . . . . . . .238
Spark Plug Service . . . . . . . . . . . . . . . . . . . . . .239
Air Cleaner Service. . . . . . . . . . . . . . . . . . . . . .240
Crankcase Breather Service. . . . . . . . . . . . . . .242
Muffl er Service . . . . . . . . . . . . . . . . . . . . . . . . .242
Battery Service. . . . . . . . . . . . . . . . . . . . . . . . . .243
Pressurized Liquid Cooling System Service. . .244
Maintaining Outboard Cooling Systems. . . .245
Storing an Engine . . . . . . . . . . . . . . . . . . . . . . .245
Systematic Troubleshooting. . . . . . . . 246
Check the Easiest Things First . . . . . . . . . . . .247
Verify the Fundamental
Operating Requirements . . . . . . . . . . . . . .247
Checking RPM. . . . . . . . . . . . . . . . . . . . . . . . . .247
Testing Compression . . . . . . . . . . . . . . . . . . . .248
Testing Differential Pressure . . . . . . . . . . . . . .249
Service Information . . . . . . . . . . . . . . 250
Engine Identifi cation . . . . . . . . . . . . . . . . . . . .253
C H A P T E R 1 4
Fuel System Service. . . . . . . 257
Troubleshooting the Fuel System . . . 257
Hard Starts. . . . . . . . . . . . . . . . . . . . . . . . . . . . .257
Checking Air-Fuel Mixture . . . . . . . . . . . . . . .258
Checking Gravity-Fed Fuel Supply . . . . . . . .259
Checking a Fuel Pump. . . . . . . . . . . . . . . . . . .260
Other Checks. . . . . . . . . . . . . . . . . . . . . . . . . . .260
Carburetor Adjustments. . . . . . . . . . . 261
High Speed and Idle Mixture Adjustment . .261
Anti-Afterfi re Solenoid Check . . . . . . . . . . . .262
Carburetor Overhaul . . . . . . . . . . . . . . 262
Carburetor Removal. . . . . . . . . . . . . . . . . . . . .263
Carburetor Disassembly . . . . . . . . . . . . . . . . .264
Diaphragm Carburetor Disassembly. . . . . . .266
Cleaning the Carburetor . . . . . . . . . . . . . . . . .266
Inspecting Float Carburetor Parts . . . . . . . . .268
Assembling Float-Type Carburetors . . . . . . .268
Inspecting Diaphragm Carburetor Parts. . . .271
Assembling a Diaphragm Carburetor . . . . . .271
Engine Governor Service. . . . . . . . . . 272
Resetting a Centrifugal Governor System. . .273
Governor Adjustment . . . . . . . . . . . . . . . . . . .273
Fuel Injection Diagnosis. . . . . . . . . . . 274
C H A P T E R 1 5
Ignition and Electrical
System Service. . . . . . . . . . . 285
Ignition System Service . . . . . . . . . . . 285
Performing a Spark Test. . . . . . . . . . . . . . . . . .285
Spark Plugs . . . . . . . . . . . . . . . . . . . . . . . . . . . .286
Magneto System Service . . . . . . . . . . . . . . . . .289
Servicing Battery Ignition Systems . . . . . . . .290
Electrical System Service. . . . . . . . . . 291
Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .291
Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .296
Ammeters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .296
Switches and Solenoids . . . . . . . . . . . . . . . . . .296
Checking the Charging
and Starting System Circuits . . . . . . . . . . .296
C H A P T E R 1 6
Engine Disassembly
and Inspection . . . . . . . . . . . 307
Introduction. . . . . . . . . . . . . . . . . . . . . 307
Engine Inspection. . . . . . . . . . . . . . . . 308
Engine Removal . . . . . . . . . . . . . . . . . . . . . . . .309
Engine Disassembly. . . . . . . . . . . . . . 310
Removal of Exterior Engine Components . . . .310
Organizing the Job . . . . . . . . . . . . . . . . . . . . . .312
Disassembling the Engine’s
Mechanical Systems . . . . . . . . . . . . . . . . . .313
Removing the Valve Assemblies
on an L-Head Engine . . . . . . . . . . . . . . . . .321
Removing the Valve Assemblies
on an Overhead Valve Engine. . . . . . . . . .322
Copyright Goodheart-Willcox Co., Inc.
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