Carburettor - Husqvarna 545RX Workshop Manual

3
18
Fuel system

Carburettor

Dismantling
Remove the cylinder cover, the air fi lter
cover, the air fi lter and the small cover (B).
Remove the hoses (C and D).
Loosen the screws (A) and remove the
screws (B).
Lift off the entire carburettor cover.
502 50 18-01
Remove the fuel hoses (C and D) from the
carburettor.
Unhook the pressure rod (E) and remove
the air supply valve (F).
Remove the throttle cable (G) from the
throttle valve shaft and lift off the carburet-
tor.
The carburettor's design
The carburettor can be divided into three
different functional units: the metering unit,
the blending unit, and the pump unit.
The metering unit
The needles and the fuel control functions
are located here.
Carburettor
Dismantling
Remove the cylinder cover, the air fi lter
cover and the air fi lter.
Remove the 4 screws (A) and lift off the
cover (B).
Remove the hoses (C and D).
Loosen the 4 screws (A). They do not
have to be removed completely.
Remove both screws (B).
Lift off the entire carburettor cover.
Prise off the fuel hoses (C and D) from the
carburettor using a screwdriver.
Unhook the pressure rod (E) from the
carburettor's valve shaft and lift of the air
supply valve (F).
Remove the throttle cable (G) from the
throttle valve shaft and lift off the carburet-
tor.
The carburettor's design
The carburettor can be divided into three
different functional units: the metering unit,
the blending unit, and the pump unit.
The metering unit
The needles (A) and the fuel control func-
tions are located here.
The needle valve (B) and control dia-
phragm (C) are vital to the carburettor's
function.