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Workshop manual
Husqvarna 340/345/346XP/350/351/353
Contents
Introduction ........................................................... 2
Safety regulations ................................................. 3
General instructions ........................................... 3
Special instructions ............................................ 3
Special tools .......................................................... 4
Technical data ....................................................... 6
Construction and function ................................... 8
Carburettor ......................................................... 8
Troubleshooting .................................................. 10
Repair instructions ............................................. 12
Chain brake ...................................................... 12
Silencer ............................................................ 14
Chain catcher ................................................... 14
Stop switch ....................................................... 15
Stop switch – resistance measurement ........... 15
Choke control ................................................... 16
Throttle trigger .................................................. 17
Hand grip heater .............................................. 18
Starter assembly .............................................. 21
Starter cord ...................................................... 21
Recoil spring .................................................... 22
Ignition module – testing .................................. 23
Ignition module and flywheel ............................ 23
Generator ......................................................... 24
Centrifugal clutch ............................................. 26
Oil pump ........................................................... 27
Carburettor ....................................................... 30
Carburettor – pressure testing ......................... 33
Carburettor heater ............................................ 34
Air intake system .............................................. 35
Carburettor – adjustment ................................. 37
Fuel tank .......................................................... 38
Fuel filter .......................................................... 39
Fuel hose ......................................................... 39
Piston and cylinder........................................... 41
Decompression valve – pressure testing ......... 42
Cylinder – pressure testing .............................. 44
Crankcase and crankshaft ............................... 45
Crankshaft bearings ......................................... 46
Repairing damaged threads............................. 49
Thread insert .................................................... 49
Guide bar bolts................................................. 49
Appendix A, Carburettor – EPA models ........... 50