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Repair instructions
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.
O
N
F
G
Z
Y
H
K
X
V
3
5
4
1
V
K
O
N
F
G
Z
X
Y
H
5
3
4
1
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.
Heating element
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.