Husqvarna 340, 345, 346XP,350, 351, 353 manual Tank vent - testing, Fuel tank - refitting

Repair instructions

Tank vent – testing

1

Connect pressure gauge 502 50 38-01 to the fuel hose. Pump the pressure up to 50 kPa (0.5 bar). The pressure should drop to 20 kPa (0.2 bar) within 60 seconds.

2

Use gauge 502 50 37-01 to measure vacuum. Readings should be as follows: the vacuum should increase from 30 to 15 within 30 seconds. If readings are outside this range the vyon plugs must be replaced.

Fuel tank – refitting

1

Insert the fuel hose into the carburettor chamber. Refit the fuel tank.

2

Bolt the front vibration damping spring into posi- tion, followed by both stops and the remaining two vibration damping springs. Tighten to a torque of 2–3 Nm. Check that both vibration damping springs and the stops are correctly seated on the crankcase. Incorrect fitting may result in higher vibration levels.

3

Fit the throttle pushrod in the tank and connect it to the carburettor. Refit the spring.

4 A

C

B

Connect the fuel hose to the carburettor. Check that the hose is not kinked or too long to be clamped between the crankcase and tank. The correct hose length between the tank and crank- case is 43 mm (1.69 inches). The correct hose length between the crankcase and carburettor is 53 mm (2.09 inches) excluding the mitred section.

5

Connect the fuel hose to the carburettor.

6

Then refit:

•cable guide

•starter assembly (2.5–3 Nm)

•chain and guide bar

•clutch cover

•air filter

•cylinder cover

40 – English