Husqvarna 445 - Technical Data; Engine and Ignition Specifications; Fuel, Oil, and Weight Specifications; Bar and Chain Specifications

English – 39
Leakage at Fault with
Diffuser jets Needle valve
Leakage in impulse tube Pump diaphragm
Ventilation hole
on metering unit. Control diaphragm
Pressure testing the carburettor
Pressure testing should be carried out with the car-
burettor fully assembled. Testing should always be
carried out after the carburettor has been repaired,
but it can also be carried out as trouble shooting
before dismantling the carburettor.
See gure and carry out the test as follows
1
Set the high and low jet screws two turns from
the bottom.
2
Connect pressure tester to the carburettor’s fuel
intake.
3
Lower the carburettor into a beaker of water. (see
gure 3)
4
Pump the pressure up to 50 kPa (0.5 bar).
5
No leakage is permitted. If a leakage occurs refer
to the table below.
Repair instructions
Replacing the bimetal
1
Release the locking sleeve (A) using a screwdriver.
(see gure 38)
2
Dismantle the bimetal (B). (see gure 38)
3
Fit the new bimetal. Ensure that it is seated correc-
tly. (see gure 39)
4
Assembling the locking sleeve. (A) (see gure 38)
B
A
Fig 37
Fig 38
Fig 39