Owner's Manual

13BR 340, BR 380
English / USA
Adjusting the Control Handle
: Put the unit on your back.
: Loosen the clamp screw (11).
: Slide the control handle (10) along
the pleated hose to the most
comfortable position.
: Tighten down the clamp screw (11).
Adjusting the Harness Straps
: Pull the ends of the straps
downward to tighten the harness.
Loosening the Harness Straps
: Lift the tabs of the two sliding
adjusters.
: Adjust the straps so that the
backplate is held firmly and
comfortably against your back.
This engine is certified to operate on
unleaded gasoline and the STIHL two-
stroke engine oil at a mix ratio of 50:1.
Your two-stroke engine requires a
mixture of high-quality gasoline and
quality two-stroke air cooled engine oil.
Use mid-grade unleaded gasoline with a
minimum octane rating of 89 (R+M/2). If
the octane rating of the mid-grade
gasoline in your area is lower, use
premium unleaded fuel.
Fuel with a lower octane rating may
increase engine temperatures. This, in
turn, increases the risk of piston seizure
and damage to the engine.
The chemical composition of the fuel is
also important. Some fuel additives not
only detrimentally affect elastomers
(carburetor diaphragms, oil seals, fuel
lines, etc.), but magnesium castings and
catalytic converters as well. This could
cause running problems or even
damage the engine. For this reason
STIHL recommends that you use only
nationally recognized high-quality
unleaded gasoline!
11
10
373BA002 KN
373BA003 KN
373BA004 KN
Fuel