Replacing The Tank Housing; Carburetor Heating - Stihl MS 650 Manual

12.11 Replacing the Tank
Housing
– Separate the crankcase/tank
housing – b 12.10
– Remove the front handle –
b 10.3
– On machines with handle
heating, remove the heater
switch – b 14.2
– Remove the throttle trigger –
b 10.2
– Remove the switch shaft –
b 10.1
– Remove the contact spring –
b 7.4
2
: Pull tank cap cord (1) out of
slot (2).
– Remove the tank cap.
1
: Take out the screws (1).
– Remove carburetor housing from
tank housing.
90
– Remove the short circuit wire –
b 15.1
– Remove the fuel hose in the tank
– b 12.9
– Remove the tank vent – b 12.6
Reassemble in the reverse
sequence.
Make sure the impulse hose and
wires are correctly positioned
without kinks.
– Test tank vent for leaks –b 12.6
1
1
13.

Carburetor Heating

Current is supplied via wires to the
heating element installed between
the heating plate and carburetor.
Carburetor heating is controlled by
a thermostatic switch on the heating
plate.
The carburetor heating system
should be checked if running
problems occur when the cold
engine is idling or running at part
load, particularly at temperatures
below freezing.
Idling problems with a hot engine
are also an indication of a fault in the
carburetor heating system.
MS 650, MS 660