Stanley STR-750 Original Instructions Manual page 13

AIR FILTER
1. Inspect the air filter regularly. Clean it at least every
25 hours or replace with a new one if necessary.
2. Press the air filter seat,open the air filter case. Tap
the filter on a stable surface to remove dust. Use high
pressure air (max. 3 bar) to remove stubborn dust.
3. Apply a small amount of air filter oil on the filter to
increase the filter performance. Wring out surplus oil
and put the filter into the case.
4. Close the air filter case.
FUEL
1. Empty the fuel tank when storing the machine over 30
days to avoid deterioration of the fuel.
2. Open the tank by unscrewing the tank cap and use a
proper fuel pump to empty the tank.
NOTE: Petrol deteriorates over time. Engine starting
may be difficult if you use petrol kept for more than
30 days. Always empty the fuel tank when storing
over 30 days.
FUEL FILTER
The fuel tank of this machine is fitted with a filter
located at the free end of fuel pipe. Periodically ask an
authorised service centre or similar qualified
person to check and replace it.
SPARK PLUG
1. Inspect the spark plug at least every 25 hours, clean
and replace with a new one if necessary.
2. Unplug the spark plug connector by pulling.
3. Loosen the spark plug with the spark plug wrench and
remove it.
4. The colour of the electrode shall be light brown.
5. Remove debris like oil with a brass brush. Do not force
the brush to avoid any damage.
6. Dry the spark plug with a soft cloth if it is wet.
7. Check the spark plug gap. It should be 0.6-0.7mm.
8. Replace with a new spark plug if you find damages
like cracks or a splintered insulation.
9. Screw in the spark plug by hand, and then tighten it
with a spark plug wrench.
A
CARBURETTOR
The carburettor is readjusted by the manufacturer.
Should it be necessary to make any changes please
contact an authorised service centre or similar
qualified person. Do not attempt to make adjustments by
yourself.
SILENCER
Should it be necessary to make any changes or
replacement, please contact
an authorised service centre or similar qualified person.
REPLACING SPOOL
1. If the cutting line is used up the spool must either
be replaced by one of the same type or the cutting line
must be refilled.
2. To refill the cutting line lay the machine on a flat
stable surface with its spool assembly facing upwards.
3. Open the spool assembly by unscrewing the bumper
clockwise.
4. To replace the spool simply remove from the spool
assembly and replace with a new one of the same type
that recommended.
WARNING! Do not over tighten the spark plug to
avoid any damage!
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