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

1 59

Download 59 pages 9.65 Kb

Page 23

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.

22

Image 23

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 Contents General recommendations Starter Contents Dismantling 1Starter Starter Assembly Replacing the drive dogs Electrical system 502 71 Electrical systemChecking the ignition spark Tip 502 50 Replacing the spark Plug cover 502 54 Heated handles Drive dogs Wiring diagram Electrical system Fuel system Air filter Fuel system Fuel filter Tank venting Dismantling Fuel pumpCarburettor Blending unit Carburettor’s designMetering unit Dismantling the carburettor Pump unit Fuel 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 hoses Fine 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 optimal Rotating Carburettor adjustment 345RX/FXAdjusting the L-needle Adjusting the H-needle Throttle Check for wear on pins a and B Tip Page Centrifugal clutch 502 21 Centrifugal clutch Do not lose the sleeve bearings found in the clutch shoes Centrifugal clutch 502 11 Clutch drum Change the bearings in the clutch housing if necessary Page Angle gear Let the small circlip around the axle remain Angle gear Input axle with pinion must be dismantled first 503 97 503 80 Shaft Cylinder 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, inspection Cause Action Analysis and actionsInsufficient lubrication Piston scoring caused by heavy carbon deposits Piston ring breakage Piston damage caused by a too high engine speed Cause Foreign objects Defect Action Service tips Wear tolerances Crankshaft and crankcase Crankshaft and crankcase 502 52 Crankshaft and crankcase Inspecting Crankshaft Assembly To ensure a proper seal Leakage testing CrankcasePress down the sealing plates as Far as possible between the bolts 503 55 Husqvarna E-Tech