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 leaner to 
achieve an apparent increase in power – 
this could damage the engine – see 
"Adjusting the Carburetor".
Check chain tension frequently
A new chain has to be retensioned more 
often than one that has been in use for 
some time.
Chain cold
Tension is correct when the chain fits 
snugly against the underside of the bar 
and can still be pulled along the bar by 
hand. Retension if necessary – see 
"Tensioning the Saw Chain".Chain at operating temperature
The chain stretches and begins to sag. 
The drive links must not come out of the 
bar groove – the chain may otherwise 
jump off the bar. Retension the chain – 
see "Tensioning the Saw Chain".
NOTICE
The chain contracts as it cools down. If it 
is not slackened off, it can damage the 
gear shaft and bearings.
After long period of full-throttle operation
Allow engine to run for a short while at 
idle speed so that engine heat can be 
dissipated by the flow of cooling air. This 
protects engine-mounted components 
(ignition, carburetor) from thermal 
overload.
After Finishing Work
NSlacken off the chain if you have 
retensioned it at operating 
temperature during cutting work.
NOTICE
Always slacken off the chain after 
finishing work. The chain contracts as it 
cools down. If it is not slackened off, it 
can damage the gear shaft and 
bearings.
Storing your saw for a short period
Wait for the engine to cool down. Drain 
the fuel tank. Store the machine in a dry 
location. Check the tightness of all 
accessible screws and nuts (not 
adjusting screws) at regular intervals 
and retighten if necessary.Storing for a long period
See chapter on "Storing the Machine"
Operating Instructions 
						

							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 will otherwise 
scrape along the bottom of the groove – 
the cutters and tie straps will not ride on 
the bar rails.If there is a noticeable loss of engine 
power
NTurn the choke knob to g
NTake out the screw (1) and remove 
the filter cover (2). 
NClean away loose dirt from around 
the filter.
NGrip the filter element (3) at the 
cutout (arrow) in the filter 
housing (4) and remove it.
NFit a new filter element. As a 
temporary measure you can knock it 
out on the palm of your hand or blow 
it out with compressed air. Do not 
wash.
NReplace damaged parts.
Installing the filter
NInstall the filter element in the filter 
housing and fit the cover.
NInsert the screw and tighten it down 
firmly.
Taking Care of the Guide Bar
Chain type Chain pitch Minimum 
groove 
depth
Picco 3/8" P 0.20" 
(5.0 mm)
3 2
1
390BA050 KN
&OHDQLQJWKH$LU)LOWHU
1
273BA006 KN
2
4 
						

							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 speed
Engine stops while idling
NWarm up the engine for about 
3 minutes.
NTurn the idle speed screw (LA) 
slowly clockwise until the engine 
runs smoothly – the chain must not 
rotate.
Chain rotates when engine is idling
NTurn the idle speed screw (LA) 
counterclockwise until the chain 
stops running and then turn the 
screw about another 1/2 to 3/4 turn 
in the same direction.
WARNING
If the chain continues moving when the 
engine is idling, have your  machine 
checked and repaired by your servicing 
dealer.Engine ManagementAdjusting the Carburetor
249BA066 KNLA
HL 
						

							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 one.
NRefit the spark arresting screen.
NInsert screw and tighten it down 
firmly.
NInstall the shroud.If engine is down on power, difficult to 
start or runs poorly at idling speed, first 
check the spark plug.
Fit a new spark plug after approx. 100 
operating hours or earlier if the 
electrodes are badly eroded.
Wrong fuel mix (too much engine oil in 
the gasoline), a dirty air filter and 
unfavorable running conditions (mostly 
at part throttle etc.) affect the condition 
of the spark plug. These factors cause 
deposits to form on the insulator nose 
which may result in trouble in operation.
Removing the spark plug
NMove the slide control to STOP-0.
NPull off the spark plug boot (1).
NUnscrew the spark plug.
Spark Arresting Screen in 
Muffler
249BA059 KN
1
2
3
2249BA060 KN
6SDUN3OXJ
1
249BA063 KN 
						

							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. Always press the spark plug 
boot (1) snugly onto the spark plug 
terminal (2).
Do not use a spark plug with a 
detachable SAE adapter terminal (3). 
Arcing may occur that could ignite 
combustible fumes and cause a fire. 
This can result in serious injuries or 
damage to property. 
NOnly use resistor type spark plugs 
with solid, non-threaded terminals
Installing the spark plug
NScrew the spark plug (3) into the 
cylinder and fit the boot (2) (press it 
down firmly).
000BA039 KNA
2
1
0000-GXX-1831-A0
3
3
002BA178 KN
2 
						

							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 filter.
NIf you use a biological chain and bar 
lubricant, e.g. STIHL BioPlus, 
completely fill the chain oil tank.
NStore the machine in a dry, high or 
locked location, out of the reach of 
children and other unauthorized 
persons.NRemove the chain sprocket cover, 
chain and guide bar.
Replace the chain sprocket
–after using two saw chains or 
sooner
–if the wear marks (a) are deeper 
than 0.02 in  (0.5 mm) since this 
would reduce the life of the chain. 
Use a gauge (special accessory) to 
check the depth of the wear marks.
It is best to use two saw chains in 
rotation with one sprocket.
STIHL recommends the use of original 
STIHL chain sprockets.The chain sprocket is driven via a friction 
clutch. Have the chain sprocket replaced 
by a servicing dealer. 
STIHL recommends that you have 
servicing and repair work carried out 
exclusively by an authorized STIHL 
servicing dealer.
Storing the MachineChecking and Replacing the 
Chain Sprocket
a
000BA054 KN 
						

							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 the shape and size of 
the original parts.
Carbide-tipped saw chains (Duro) are 
particularly wear resistant. STIHL 
recommends you have your chain 
resharpened by a STIHL servicing 
dealer.
WARNING
It is absolutely essential to comply with 
the angles and dimensions specified 
below. If the saw chain is incorrectly 
sharpened – and in particular if the depth 
gauge is set too low – there is an 
increased risk of kickback, with resulting 
risk of injury.
The saw chain cannot be locked in place 
on the guide bar. Therefore, it is best to 
remove the chain from the bar and 
resharpen it on a workshop sharpening 
tool (FG 2, HOS, USG).
Chain pitch
The chain pitch (a) is marked on the 
depth gauge end of each cutter.
Select file diameter according to chain 
pitch – see table “Sharpening Tools”.
You must observe certain angles when 
resharpening the chain cutter.
Filing and side plate angles
AFiling angleSTIHL saw chains are sharpened to a 
filing angle of 30°. Exceptions are 
ripping chains with a filing angle of 10°. 
Ripping chains have an X in their 
designations.
BSide plate angle
The correct side plate angle is obtained 
automatically if you use the prescribed 
file holder and file diameter.
The angles must be the same on all 
cutters. If the angles are uneven: Chain 
will run roughly, not in a straight line, 
wear quickly and finally break.
File holder
NUse a file holder
A file holder must be used for manual 
resharpening (see table "Sharpening 
Tools"). The correct filing angles are 
marked on the file holder.
Maintaining and Sharpening 
the Saw Chain
Mark (a)Chain pitch
inch mm
7 1/4 P 6,35
1 or 1/4 1/4 6,35
6, P or PM 3/8 P 9,32
2 or 325 0.325 8,25
3 or 3/8 3/8 9,32
689BA027 KN
a
A
B
689BA021 KN
&XWWHUVKDSHV $QJOHr
$%
0LFUR VHPLFKLVHOFXWWHU
HJ 30 50
 30 
6XSHU FKLVHOFXWWHUHJ
 36 56 56 
5LSSLQJFKDLQHJ
 30; 50; 
689BA025 KN 
						

							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 2, HOS or USG 
sharpener: Remove the chain from 
the bar and sharpen according to 
the instructions supplied with the 
tool.
NClamp the bar in a vise if necessary.
NSharpen the chain frequently, take 
away as little metal as possible – 
two or three strokes of the file are 
usually enough.NHold the file horizontally (at a right 
angle to the side of the guide bar) 
and file according to the angles 
marked on the file holder. Rest the 
file holder on the top plate and depth 
gauge.
NAlways file from the inside to the 
outside of the cutter.
NThe file only sharpens on the 
forward stroke – lift the file off the 
cutter on the backstroke.
NAvoid touching the tie straps and 
drive links with the file.
NRotate the file at regular intervals 
while filing to avoid one-sided wear.
NUse a piece of hardwood to remove 
burrs from the cutting edge.
NCheck angles with the filing gauge.
All cutters must be the same length.If the cutters are not the same length, 
they will have different heights. This 
makes the chain run roughly and can 
cause it to break.
NFind the shortest cutter and then file 
all other cutters back to the same 
length. It is best to have this work 
done by a servicing dealer on an 
electric grinder.
Depth gauge setting
The depth gauge determines the height 
at which the cutter enters the wood and 
thus the thickness of the chip removed.
aSpecified distance or setting 
between depth gauge and cutting 
edge.
This setting may be increased by 0.2 
mm (0.008") for cutting softwood in the 
mild weather season – no frost.
001BA203 KN
689BA018 KN
90°
689BA043 KN
&KDLQSLWFK HSWKJDXJH
6HWWLQJD
LQFK PP PP LQFK
3   
   
3   
   
   
689BA023 KN
a 
						

							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 along with the 
depth gauge. WARNING
The other parts of the humped drive link 
must not be filed since this may increase 
the kickback tendency of the power tool.
NFile down the depth gauge until it is 
level with the filing gauge.
NFile the top of the depth gauge 
parallel to the stamped service 
marking (see arrow) – but do not 
lower the highest point of the depth 
gauge in this process.WARNING
The kickback tendency of the machine is 
increased if the depth gauges are too 
low.
NPlace the filing gauge on the chain – 
the highest point of the depth gauge 
must be level with the filing gauge.
NAfter sharpening, clean the chain 
thoroughly, remove filings or 
grinding dust – lubricate the chain 
thoroughly.
NBefore a long out-of-service period, 
clean the chain and store it in a well-
oiled condition.
2
689BA061 KN
1689BA051 KN
689BA044 KN
689BA052 KN
6KDUSHQLQJ7RROVVSHFLDODFFHVVRULHV
&KDLQSLWFK 5RXQGILOH^Round file File holder Filing gauge Flat file Sharpening kit 1)
inch (mm) mm (inch) Part No. Part No. Part No. Part No. Part No.
1/4 P (6,35) 3,2 (1/8) 5605 771 3206 5605 750 4300 0000 893 4005 0814 252 3356 5605 007 1000
1/4 (6,35) 4,0 (5/32) 5605 772 40065605 750 4327 1110 893 4000 0814 252 3356 5605 007 1027
3/8 P (9,32) 4,0 (5/32) 5605 772 4006 5605 750 4327 1110 893 4000 0814 252 3356 5605 007 1027
0.325 (8,25) 4,8 (3/16) 5605 772 4806 5605 750 4328 1110 893 4000 0814 252 3356 5605 007 1028
3/8 (9,32) 5,2 (13/64) 5605 772 5206 5605 750 4329 1110 893 4000 0814 252 3356 5605 007 1029
1)consisting of file holder with round file, flat file and filing gauge 
						

							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