Operating Instructions; Cleaning The Air Filter - Stihl PC 70 Instruction Manual

English
► Start the engine by pulling the starter rope
briskly – 10 to 20 pulls may be necessary.
If the engine still does not start
► Push the slide control in the direction of the
arrow on the stop symbol (h) to STOP‑0.
► Remove the spark plug – see "Spark Plug".
► Dry the spark plug.
► Open the throttle wide and pull the starter rope
several times to clear the combustion cham‐
ber.
► Refit the spark plug – see "Spark Plug".
► Move the slide control to START.
► Set the choke lever to e – even if the engine
is cold.
► Now start the engine.
Throttle cable adjustment
► Check adjustment of throttle cable – see chap‐
ter on "Adjusting the Throttle Cable".
Fuel tank run until completely dry
► After refueling, press the manual fuel pump
bulb at least five times – even if the bulb is fil‐
led with fuel.
► Set the choke lever to suit the engine temper‐
ature.
► Now start the engine.

10 Operating Instructions

10.1 During break-in period
A factory-new machine should not be run at high
revs (full throttle off load) for the first three tank
fillings. This avoids unnecessary high loads dur‐
ing the break-in period. As all moving parts have
to bed in during the break-in period, the frictional
resistances in the engine are greater during this
period. The engine develops its maximum power
after about 5 to 15 tank fillings.
10.2 During Operation
After a long period of full throttle operation, allow
the engine to run for a short while at idle speed
so that engine heat can be dissipated by the flow
of cooling air. This protects engine-mounted
components (ignition, carburetor) from thermal
overload.
10.3 After Finishing Work
Storing for a short period: Wait for the engine to
cool down. Empty the fuel tank and keep the
machine in a dry place, well away from sources
of ignition, until you need it again. For longer out-
of-service periods – see "Storing the Machine".
52

11 Cleaning the Air Filter

Dirty air filters reduce engine power, increase
fuel consumption and make starting more diffi‐
cult.
Your power tool comes standard with either a
clip-on or screw-mounted filter cover.
11.1 If there is a noticeable loss of
engine power
► Set the choke lever to g.
On the clip-on filter cover:
► Press in the tab (1) and swing the filter
cover (2) away.
10 Operating Instructions
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0458-754-8721-E