Stihl Ht 101 Z Parts Manual

HT 100, HT 101, HT 130, HT 131
English
29
During break-in period
A factory-new machine should not be 
run at high revs (full throttle off load) for 
the first three tank fillings. This avoids 
unnecessary high loads during the 
break-in period. As all moving parts 
have to bed in during the break-in 
period, the frictional resistances in the 
engine are greater during this period. 
The engine develops its maximum 
power after about 5 to 15 tank fillings.
During Operation
NOTICE
Do not make the mixture...

HT 100, HT 101, HT 130, HT 131
English
30 NTurn the bar over – every time you 
sharpen the chain and every time 
you replace the chain – this helps 
avoid one-sided wear, especially at 
the nose and underside of the bar.
NRegularly clean the oil inlet hole (1), 
the oilway (2) and the bar 
groove (3).
NMeasure the groove depth – with the 
scale on the filing gauge (special 
accessory) – in the area used most 
for cutting.
If groove depth is less than specified:NReplace the guide bar.
The drive link tangs...

HT 100, HT 101, HT 130, HT 131
English
31 Exhaust emissions are controlled by the 
design of the fundamental engine 
parameters and components (e.g. 
carburation, ignition, timing and valve or 
port timing) without the addition of any 
major hardware.The carburetor comes from the factory 
with a standard setting.
This setting provides an optimum fuel-air 
mixture under most operating 
conditions.
With this carburetor it is only possible to 
adjust the high speed screw within fine 
limits.
Adjusting idle...

HT 100, HT 101, HT 130, HT 131
English
32 The muffler is equipped with a spark 
arresting screen.
NIf the engine is down on power, 
check the spark arresting screen in 
the muffler.
NWait for the muffler to cool down.
NMove the slide control to STOP-0.
NTake out the screw (1).
NTake out the screws (2) and remove 
the shroud (3).NTake out the screw (4).
NLift the spark arresting screen (5) 
and pull it out.
NClean the spark arresting screen. If 
the screen is damaged or heavily 
carbonized, fit a new...

HT 100, HT 101, HT 130, HT 131
English
33
Checking the Spark Plug
NClean dirty spark plug.
NCheck electrode gap (A) and 
readjust if necessary – see chapter 
"Specifications."
NUse only resistor type spark plugs of 
the approved range.
Rectify problems which have caused 
fouling of spark plug:
–too much oil in fuel mix,
–dirty air filter,
–unfavorable running conditions, e.g. 
operating at part load.
WARNING
To reduce the risk of fire and burn injury, 
use only spark plugs authorized by 
STIHL....

HT 100, HT 101, HT 130, HT 131
English
34 For periods of 3 months or longer
NDrain and clean the fuel tank in a 
well ventilated area.
NDispose of fuel properly in 
accordance with local 
environmental requirements.
NRun the engine until the carburetor 
is dry – this helps prevent the 
carburetor diaphragms sticking 
together.
NRemove the saw chain and guide 
bar, clean them and spray with 
corrosion inhibiting oil.
NThoroughly clean the machine – pay 
special attention to the cylinder fins 
and air...

HT 100, HT 101, HT 130, HT 131
English
35 Cutting effortlessly with a correctly 
sharpened chain
A properly sharpened chain slices 
through wood effortlessly and requires 
very little feed pressure.
Do not work with a dull or damaged 
chain as it will increase the physical 
effort required, produce unsatisfactory 
results and a higher rate of wear.
NClean the chain.
NCheck the chain for cracks in the 
links and damaged rivets.
NReplace any damaged or worn 
parts of the chain and match the 
new parts to...

HT 100, HT 101, HT 130, HT 131
English
36 Use only special saw chain sharpening 
files. Other files have the wrong shape 
and cut.
For checking angles
Use a STlHL filing gauge (special 
accessory, see table "Sharpening 
Tools"). This is a universal  tool for 
checking the filing and side plate angles, 
depth gauge setting, cutter length and 
groove depth. It also cleans the guide 
bar groove and oil inlet holes.
File correctly
NSelect sharpening tools according 
to chain pitch.
NIf you use an FG...

HT 100, HT 101, HT 130, HT 131
English
37
Lowering depth gauges
The depth gauge setting is reduced 
when the chain is sharpened.
NUse a filing gauge to check the 
setting every time you sharpen the 
chain.
NPlace a filing gauge (1) that 
matches the chain pitch on the 
chain and press it against the cutter 
– if the depth gauge projects from 
the filing gauge, the depth gauge 
has to be lowered.
Saw chains with humped drive link (2) – 
upper part of humped drive link (2) (with 
service mark) is lowered...

HT 100, HT 101, HT 130, HT 131
English
38 Bearings in Telescoping Drive Tube 
(depending on model)
The bearings (arrows) in the telescoping 
drive tube are subject to normal wear 
and tear.
If there a noticeable increase in 
vibrations or running noises:
NHave your dealer check and, if 
necessary, replace the bearings in 
the drive tube – STIHL recommends 
a STIHL servicing dealer.
Inspections and Maintenance 
by Dealer
0000-GXX-1905-A0