121MS 441, MS 441 C
: Prise off and remove cover (1).
1
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: Prise out tank vent (1).
Always fit a new tank vent.
– Wet O-ring of new tank vent with
STIHL Press Fluid, b 17.
– Press new tank vent as far as
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1
possible into opening.
– Reassemble all other parts in the
reverse sequence.
Any impurities mixed with the fuel
are retained by the pick-up body
(filter). The fine pores of the filter
eventually become clogged with
minute particles of dirt. This restricts
the passage of fuel and results in
fuel starvation.
In the event of trouble in the fuel
system, always check the fuel tank
and pick-up body first.
– Troubleshooting, b 4.6 or
b 4.7.
: Pull pick-up body (1) out of the
fuel tank with assembly hook
5910 893 8800.
Do not over-extend the fuel hose.
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: Pull pick-up body (1) off the fuel
hose (2).
– Examine pick-up body and clean
or replace if necessary.
– Reassemble in the reverse
sequence.
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1 2
Clean fuel tank if necessary.
– Open fuel filler cap and drain fuel
tank.
– Fill tank with a little fresh
gasoline, close the tank and
shake it thoroughly.
– Reopen and empty the tank.
– Dispose of fuel in accordance
with environmental regulations.
14.7.2 Removal and installation 14.8 Fuel intake
14.8.1 Pick-up body
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