Engine Running Behavior; Lubricating The Gearbox - Stihl BT 131 Instruction Manual

English
Use resistor type spark plugs with a
N
properly tightened adapter nut.
Installing the Spark Plug
Screw the spark plug (3) into the
N
cylinder.
Tighten down the spark plug (3) with
N
the combination wrench.
Press the boot (2) firmly onto the
N
spark plug.
Fit the cover (1) and screw it down
N
firmly.
16

Engine Running Behavior

If engine running behavior is still
unsatisfactory after the air filter has been
serviced and the carburetor and throttle
cable have been adjusted correctly, the
cause may also be in the muffler.
Have the muffler checked for
contamination (coking) by a servicing
dealer!
STIHL recommends that maintenance
and repair work be carried out only by
authorized STIHL dealers.

Lubricating the Gearbox

Check grease level after every 50 hours
of operation and re-lubricate if
necessary.
1
Remove the screw plug (1).
N
If no grease can be seen on the
N
inside of the screw plug (1): Screw
the tube (2) of STIHL gear lubricant
(special accessory) into the filler
hole.
Squeeze about 5 - 10 g (1/5 - 2/5
N
oz) grease into the gearbox.
NOTICE
Do not completely fill the gearbox with
grease.
Unscrew the tube (2).
N
Insert the screw plug (1) and tighten
N
it down firmly.
BT 131