Husqvarna 343F, 345FX, 345FXT, 343R, 345RX manual H-needle is a little shorter, Than the L-needle

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3	Fuel system
	Attach the various parts of the measur-	Attach the various parts of the measur-
	ing unit in the reverse order as set out	ing unit in the reverse order as set out
	for dismantling.	for dismantling.
		The lever arm should lie flush with the
		carburettor housing.
		Too high setting = too much fuel.
		Too low setting = too little fuel.
		NOTE!
		The H-needle is a little shorter
		than the L-needle.
	Check that the carburettor is sealed.	Connect pressure tester 531 03 06-23
	No leakage is permitted at 50 kPa.	to the fuel intake on the carburettor.
	No leakage is permitted at 50 kPa.
		Pump up the pressure to 50 kPa.
		Lower the carburettor in a vessel with
		petrol in order to discover any leaks
		more easily.
		No leakage is permitted.

531 03 06-23

Attach the control diaphragm and	Place the gasket on the carburettor
cover.	housing and then the control dia-
	phragm.
	Check that the air hole in the cover is
	open and screw the cover on.

Assembly	Assembly
Slide the carburettor into place and	Slide the carburettor into place.
connect the fuel hoses.	Connect the fuel hose (A) to the carburettor.
	Connect the fuel hose (A) to the carburettor.

Make sure that they do not get pinched.	Connect the fuel hose (B) to the carburettor
	Connect the fuel hose (B) to the carburettor
Connect the throttle cable to the	and make sure that it is in the groove (C).
carburettor.	Place the filter holder in place and make
	Place the filter holder in place and make
	sure that the fuel hose (D) is under the
	carburettor and is not pinched.
	Connect the throttle cable (E) to the
	carburettor.
	Screw down the filter holder and attach
	the air filter.
	NOTE!
	Check carefully that the fuel hoses
	are not bent or pinched when the
	fuel tank is pushed back into
	place against the engine body.
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Contents English Workshop Manual Brushcutter, Trimmer Model 343R, 345RX, 343F, 345FX, 345FXT ContentsGeneral recommendations Starter ContentsDismantling 1StarterStarter AssemblyReplacing the drive dogs Electrical system Checking the ignition spark Electrical system502 71 Tip 502 50 Replacing the spark Plug cover502 54 Heated handles Drive dogsWiring diagram Electrical system Fuel system Air filter Fuel systemFuel filter Tank ventingCarburettor Fuel pumpDismantling Metering unit Carburettor’s designBlending unit Dismantling the carburettor Pump unitFuel system For example, the H-needle is a PositionedLittle shorter than the L-needle Assembling the carburettor Than the L-needle H-needle is a little shorterCheck carefully that the fuel hoses Are not bent or pinched whenBasic setting Carburettor settingsFine adjustment Correctly adjusted carburettor Setting Recommended max. speed must not be exceededTachometer should always be used to find the optimal Idling speed T-screwAdjusting the L-needle Adjusting the H-needle Carburettor adjustment 345RX/FXThrottle RotatingCheck 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 When the valve is fitted the small hole must face outwards Turn the valve the right way when fittingDecompression valve Inlet manifold Cleaning, inspectionInsufficient lubrication Analysis and actionsCause Action 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 Press down the sealing plates as Leakage testing CrankcaseFar as possible between the bolts To ensure a proper seal503 55 Husqvarna E-Tech