Index - Echo PB-251 Service Manual

PB-251
Adapter, piston pin tool 44, 46
Air filter 26, 49
Ball bearing, crankcase 45
Bearing tool 6, 45
Bolt (as special tool) 6, 20
Carburetor 33
Carburetor adjustment 29, 30
Carburetor pressure test 31
Coil resistance 16
Compression gauge 6, 40
Compression pressure 3, 40
Con-rod small end bore 5
Cooling air passage 40, 49
Crankcase 42, 45, 46
Crankcase / Cylinder sealings 42
Crankcase pulse passage 32
Crankshaft 45, 46
Crankshaft runout 5
Cylinder 42, 43, 47
Cylinder bore 5
Cylinder compression 40
Cylinder fins 40
Diaphragms, carburetor 33
Disassembly chart 52
Exhaust port 41, 49
Fan 38
Fan case 38
Fan hub 20, 38
Flanged nut (as special tool) 6, 20
Flywheel 19
Fuel cap 26, 49
Fuel lines 27, 28, 31, 49
Fuel strainer 26, 28, 49
Fuel tank 27, 49
Gasket, carburetor diaphragm 33
Gasket, crankcase 46
Gasket, fuel cap 26
Gasket, muffler 42
Grommet, fuel line 28
Grommet, tank vent 28
H mixture needle 3, 29, 30

INDEX

High tension lead 16
Idle mixture needle 3, 29, 30
Idle adjust screw 3, 29, 30
Idling speed 3, 29, 30
Ignition coil 19
Ignition switch 17
Ignition timing 3
Inlet needle valve 33
Inlet screen 33
Intake insulator 32
Key, flywheel 20
L-hex wrench 6, 12
Lead, ignition switch 17, 49
Lead terminal 17
Limiter plug 29
Limiter plug tool 6, 29
Locating pin, piston 47
Metering lever 32
Metering lever height 3, 32
Minimum secondary voltage 3
Module air gap tool 6, 19
Muffler 41, 49
Needle bearing 44, 46
Needle bearing tool 6, 44
Oil seal, crankcase 43, 45
Oil seal tool 6, 43
Pawl carrier 12
Piston 44, 46
Piston holder 6, 44, 46, 47
Piston outer diameter 5
Piston pin bore 5
Piston pin outer diameter 5
Piston pin tool 6, 44, 46, 49
Piston ring 44, 47
Piston ring end gap 5
Piston ring groove 5, 40
Piston ring side clearance 5
Piston ring width 5
Piston stopper 6, 11, 12, 20, 38, 41
Pole shoe air gaps 3, 19
Pressure connector 6, 42
Pressure plate 6, 42
Pressure plug 6, 42
Pressure tester 6, 27, 31, 42
Primary coil resistance 3
Purge bulb 31, 33
Rewind spring 9
Rope guide 10
Rope tension 11
Secondary coil resistance 3, 16
Service intervals 49
Service limits 5
Spark plug 15, 49
Spark plug cap 16
Spark plug cap coil 16
Spark plug gap 3, 15
Spark test 15
Spark tester 6, 15
Special tools 6
Specifications 2
Starter center post 10
Starter drum 8, 10, 11
Starter grip 8, 10, 11
Starter pawl 11, 12
Starter rope 8, 10, 11, 49
Tachometer 6, 29
Tank vent 27, 28
Tank vent line 27, 28
Technical data 3
Test pressure, carburetor 3
Thread locking sealant 4, 10, 20, 35,
47
Throttle bracket 35, 36
Throttle cable 23, 24, 34
Throttle cover 22, 24
Throttle rod 23, 24
Throttle trigger 23, 24
Throttle valve 34
Torque limits 4
Troubleshooting guide 50, 51
Troubleshooting guide, ignition 14
Washer (as special tool) 6, 43
53