Adjusting The Throttle Cable; Fitting The Harness; Fuel - Stihl BR 450 Instruction Manual

4 Adjusting the Throttle Cable

3.7 Wear Mark on Nozzle
The front end of the nozzle wears away due to
abrasive ground contact during operation. The
nozzle is subject to normal wear and tear and
must be replaced when the wear mark is
reached.
3.8 Transport Aid
When storing or transporting the machine:
► Secure the blower tube to the handle on the
backplate with the hook and loop fastener.
4 Adjusting the Throttle
Cable
It may be necessary to correct the adjustment of
the throttle cable after assembling the machine
or after a prolonged period of operation.
Adjust the throttle cable only when the unit is
completely and properly assembled.
0458-391-8321-B
► Set the throttle trigger to the full throttle posi‐
tion.
► Carefully rotate the screw in the throttle trigger
in the direction of the arrow until you feel initial
resistance. Then rotate it another half turn in
the same direction.
5

Fitting the Harness

5.1 Adjusting the Harness
► Pull the straps downwards to tighten the har‐
ness
5.2 Loosening the Harness
► Lift the tabs of the two sliding adjusters.
► Adjust the harness so that the backplate fits
snugly and securely against your back
6

Fuel

The engine requires a mixture of gasoline and
engine oil.
WARNING
Avoid direct skin contact with fuel and breathing
in of gasoline fumes.
6.1 STIHL MotoMix
STIHL recommends using STIHL MotoMix. This
pre-blended fuel is free of benzene and lead, is
distinguished by a high octane rating, and
always provides the proper mixing ratio.
English
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