Stihl MS 172 User Manual

► If the engine does not stop:
► Move the Master Control lever to posi‐
tion .
The engine stops.
► Do not use your chainsaw and contact your
STIHL servicing dealer for assistance.
The Master Control lever is defective.
10.6 Checking Chain Lubrication
► Start the engine and disengage the chain
brake.
► Hold the guide bar over a light surface.
► Open the throttle.
Chain oil is thrown off the chain and is visible
on the light surface. Chain lubrication is oper‐
ating properly.
► If no chain oil can be seen:
► Shut off the engine.
► Fill up with chain oil.
► Check chain lubrication again.
► If chain oil is still not visible on the light sur‐
face: Do not use your chainsaw and contact
your STIHL servicing dealer for assistance.
Chain lubrication is defective.
11 Operating the Saw
11.1 Holding and Controlling the
Chainsaw
0000-GXX-2948-A1
► Hold and control your chainsaw with your left
hand on the handlebar and your right hand on
the control handle. Wrap thumb of left hand
around the handlebar and thumb of right hand
around the control handle.
11.2 Sawing
WARNING
■ If kickback occurs, the chainsaw can be
thrown up in the direction of the operator. This
may result in serious or fatal injury to the user.
►
Always cut with the chain running at full
speed.
► Do not cut with the upper quadrant of the
guide bar nose.
► Begin the cut with the chain running at full
speed and keep the guide bar vertical.
0000-GXX-2949-A1
► Engage the spiked bumper and use it as a ful‐
crum.
► Guide the full width of the guide bar into the
wood and reposition the spiked bumper as
required.
► Take the weight of the chainsaw at the end of
the cut.
11.3 Limbing
0000-GXX-2950-A1
► Support the chainsaw on the log.
► With the chain running a full speed, pivot the
guide bar downward against the limb.
► Cut through the limb with the top of the guide
bar.
0000-GXX-1245-A0
1
2
1
2
► If the limb is under tension: Make the relieving
cut (1) at the compression side and then per‐
form the bucking cut (2) from the tension side.
11.4 Felling
11.4.1 Determining direction of fall and
escape path
► Determine direction of fall so that the area in
which the tree falls is clear.
11 Operating the Saw English
0458-200-0121-B 19

Stihl MS 172 Specifications

General

Sound pressure level	100 dB(A)
Sound power level	113 dB(A)
Displacement	31.8 cc (1.9 cu in)
Saw chain pitch	3/8"
Recommended bar length	30-35 cm (12-14 in)