nloo
G
A
Fuelsystem
Speed governor
The purposeof the governor isto limit the engine
speedin order to protect vital parts Iike the crank-
shaft and ignition systemfrom excessivestresses.We
therefore advisemost strongly againstany inter-
ference designedto render it inoperative.
When the saw is run under no-load conditions, the
enginespeedis limited to 10,500 r/rein asthe gover-
nor comesinto operation.
312
w
I
4+
4
Fig 4.6
3
1.Steelball. 2. Spring. 3. Fuel inlet. 4. Fuel outlet.
The steel ball and spring in the governorare sode-
visedthat vibrations in the carburetor at a certain
enginespeedcausethe steel ball to open the fuel
outlet. An excessivelyrich mixture isthen obtained
and the engine beginsto four-stroke, the speed
dropsand the vibrations decrease.The steel ball
then closesthe outlet, the enginespeedincreases
and the processisrepeated.
Removalof speed governor
Remove the screwfor the choke flap. Pull out the
flap approx. 7 mm and pushout the choke shaft
approx. 5 mm. Remove the speedgovernorwith a
suitable screwdriver.
Carburetorcheck
A. Pumping section
Clean the fuel screenand -lineswith compressed
air.
Check the gasketand the pump diaphragm for
damageor wear.
B. Metering section
Check that the adjusting needlesare straight and
that their tapered endsare not damaged.Check the
Fig 4:8
gasketand the metering diaphragm for damageor
wear. Check with particular care the wear on the
centre pin of the diaphragm.
Fig 4:9
Check that the needlevalve is not worn, neither on
its seat,nor in the groovefor the lever.
Fig 4:7
4:2
For Husqvarna Parts Call 606-678-9623 or 606-561-4983
www.mymowerparts.com
To Next Page
Loading...
