Manuals / Husqvarna / Lawn and Garden / Brush Cutter

Husqvarna 343F, 345FX, 345FXT, 343R, 345RX manual Positioned, For example, the H-needle is a

Models: 343F, 345FX, 345FXT, 343R, 345RX

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3	Fuel system
		Remove the movement limiters from the
		jet needles using flat nose pliers.
		Unscrew the jet needles.
		Do not lose the small washers (A)!
		Lift off the plastic and rubber guides.
		NOTE!
		Note how the jets are
		positioned.
		(For example, the H-needle is a
		little shorter than the L-needle).
	Dismantle the main jet (A) and the plug	Press out the main jet (A) with a
	(B).	suitable punch.
		Remove the plug (B).
		Carefully drill a small hole (Ø 2 mm) in
		the plug and pry it up with a pointed
		object.

Check valves and dampers for wear.

Replace if required.

Remove the valves and dampers. If these components are worn, idling is disrupted.

Always replace the valves and dampers at the same time.

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Husqvarna 343F, 345FX, 345FXT, 343R, 345RX Positioned, For example, the H-needle is a, Little shorter than the L-needle

Contents

English Workshop Manual Brushcutter, Trimmer Model 343R, 345RX, 343F, 345FX, 345FXT ContentsGeneral recommendations Starter ContentsDismantling 1StarterStarter AssemblyReplacing the drive dogs Electrical system 502 71 Electrical systemChecking the ignition spark Tip 502 50 Replacing the spark Plug cover502 54 Heated handles Drive dogsWiring diagram Electrical system Fuel system Air filter Fuel systemFuel filter Tank ventingDismantling Fuel pumpCarburettor Blending unit Carburettor’s designMetering unit Dismantling the carburettor Pump unitFuel system Little shorter than the L-needle PositionedFor example, the H-needle is a Assembling the carburettor Are not bent or pinched when H-needle is a little shorterThan the L-needle Check carefully that the fuel hosesFine adjustment Carburettor settingsBasic setting Idling speed T-screw Setting Recommended max. speed must not be exceededCorrectly adjusted carburettor Tachometer should always be used to find the optimalRotating Carburettor adjustment 345RX/FXAdjusting the L-needle Adjusting the H-needle ThrottleCheck for wear on pins a and B Tip Page Centrifugal clutch 502 21 Centrifugal clutchDo not lose the sleeve bearings found in the clutch shoes Centrifugal clutch502 11 Clutch drumChange the bearings in the clutch housing if necessary Page Angle gear Let the small circlip around the axle remain Angle gearInput axle with pinion must be dismantled first 503 97503 80 ShaftCylinder and piston Cylinder and piston Decompression valve Turn the valve the right way when fittingWhen the valve is fitted the small hole must face outwards Inlet manifold Cleaning, inspectionCause Action Analysis and actionsInsufficient lubrication Piston scoring caused by heavy carbon deposits Piston ring breakage Piston damage caused by a too high engine speedCause Foreign objectsDefect Action Service tipsWear tolerances Crankshaft and crankcase Crankshaft and crankcase 502 52 Crankshaft and crankcaseInspecting Crankshaft Assembly To ensure a proper seal Leakage testing CrankcasePress down the sealing plates as Far as possible between the bolts503 55 Husqvarna E-Tech

Fuel system

positioned.

(For example, the H-needle is a

little shorter than the L-needle).