Husqvarna 340, 345, 346XP,350, 351, 353 manual Carburettor - dismantling, Repair instructions

Heating element

Repair instructions

On saws with a carburettor heater 346XPG, 351G, 353G

Remove the bracket’s two bolts above the carbu- rettor. Disconnect the cable connections to the carburettor heater and remove the heating ele- ment.

O

	O	Z
N		Z	5
			5
N
	F
G			3
	F
G			3
	K V
			X
	KV		X

4

4

Y 1

Y	1
	H
	H

When replacing the thermostat: Disconnect the cable from X and V. Trouble shooting, see page 20.

On saws with carburettor 346XPG, 351G, 353G Replacing the heating element: Lower the rear section of the tank by removing the bolt between the hand grip cover and vibration damping springs. Remove the starter and then loosen the stop screws on both sides (one is located under the starter and this must be removed first). Now disconnect the cable from X and Y.

Dismantling the carburettor: Loosen the high, low and idling jet screws.

Carburettor – dismantling

The item numbers in the diagram refer to the steps below (1–7).

1

Remove the cover from the metering unit and carefully remove the metering diaphragm and gasket.

2

Undo the screw and take out the needle valve, together with the lever arm, spindle and spring.

3

Remove the cover from the pump unit and carefully remove the gasket and pump diaphragm.

4

Remove the fuel filter.

5

Remove the high, low and idling jet screws. (HDA 159A high and low jet screws are protected by plastic caps which can be prised off with a screw- driver. Only on EPA, see appendix A.)

6

Remove the plug by first drilling a hole in it and then prising it out with a screwdriver or the like.

7

If necessary remove the throttle and choke valves, and remove the spindles together with the lever arms and springs.

English – 31