Stihl Km 90 R Owners Manual

KM 90 R
English
19
Installing the Spark Plug
NScrew the spark plug (2) into the 
cylinder and fit the boot (1) (press it 
down firmly).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.
NThoroughly clean the machine – pay 
special attention to the air filter.
NRemove,...

KM 90 R
English
20
Maintenance and Care
The following intervals apply to normal operating conditions only. If your daily work-
ing time is longer or operating conditions are difficult (very dusty work area, etc.), 
shorten the specified intervals accordingly.
before starting work
after finishing work or daily
after each refueling stop
weekly
monthly
every 12 months
if problem
if damaged
as required
Complete machineVisual inspection (condition, leaks)XX
CleanX
Replace any damaged partsXX
Control handle...

KM 90 R
English
21
Spark arresting screen in mufflerCheckXX
Clean or replaceXX
All accessible screws and nuts (not adjust-
ing screws)RetightenX
Anti-vibration elementsCheck XXX
Have replaced by servicing dealer
1)X
Safety labels ReplaceX
1)STIHL recommends an authorized STIHL servicing dealer.2)Remove shroud - see "Spark Arresting Screen in Muffler" The following intervals apply to normal operating conditions only. If your daily work-
ing time is longer or operating conditions are difficult...

KM 90 R
English
221Fuel Filler Cap
2Carburetor Adjusting Screws
3Manual Fuel Pump
4Starter Grip
5Muffler with Spark Arresting Screen
6Coupling Sleeve
7Wing Screw
8Loop Handle
9Barrier Bar
10Carrying Ring
11Slide Control
12Throttle Trigger Lockout
13Throttle Trigger
14Spark Plug Boot
15Choke Knob
16Air Filter Cover
17Fuel Tank
18Machine Support
#Serial Number
Main Parts
1
11
16
13
9
7
14
3
4
17
18
8
10
465BA001 KN
#
25
612
15 

KM 90 R
English
23
Definitions
1 Fuel Filler Cap
For closing the fuel tank.
2 Carburetor Adjusting Screws
For tuning the carburetor.
3 Manual Fuel Pump
Provides additional fuel feed for a 
cold start.
4 Starter Grip
The grip of the pull starter, for 
starting the engine.
5 Muffler with Spark Arresting Screen
Muffler reduces exhaust noises and 
diverts exhaust gases away from 
operator.
Spark arresting screen is designed 
to reduce the risk of fire.
6 Coupling Sleeve
Connects drive tube to lower part of...

KM 90 R
English
24
Ignition system
Electronic magneto ignition
Fuel system
All position diaphragm carburetor with 
integral fuel pump
WeightUsers of this unit should carry out only 
the maintenance operations described 
in this manual. STIHL recommends that 
other repair work be performed only by 
authorized STIHL servicing dealers.
Warranty claims following repairs can be 
accepted only if the repair has been 
performed by an authorized STIHL 
servicing dealer using genuine STIHL 
replacement parts....

KM 90 R
English
25
Not for California
Your Warranty Rights and Obligations
The U.S. Environmental Protection 
Agency (EPA) and STIHL Incorporated 
are pleased to explain the Emission 
Control System Warranty on your 
equipment type engine. In the U.S. new 
1997 and later model year small off-road 
equipment engines must be designed, 
built and equipped, at the time of sale, to 
meet the U.S. EPA regulations for small 
non road engines. The equipment 
engine must be free from defects in 
materials and...

KM 90 R
English
26 required maintenance will be warranted 
for the period of time up to the first 
scheduled replacement point for that 
part.
Diagnosis
You, as the owner, shall not be charged 
for diagnostic labor which leads to the 
determination that a warranted part is 
defective. However, if you claim 
warranty for a component and the 
machine is tested as non-defective, 
STIHL Incorporated will charge you for 
the cost of the emission test. Mechanical 
diagnostic work will be performed at an...

KM 90 R
English
27
For California only
Your Warranty Rights and Obligations
The California Air Resources Board 
(CARB) and STIHL Incorporated are 
pleased to explain the emission control 
system warranty on your 2015 and later 
small off-road equipment engine.
In California, new equipment that uses 
small off-road engines must be 
designed, built, and equipped to meet 
the State's stringent anti-smog 
standards. STIHL Incorporated must 
warrant the emissions control system on 
your small off-road...

KM 90 R
English
28 The warranty on emissions-related parts 
will be interpreted as follows:
1.Any warranted part that is not 
scheduled for replacement as 
required maintenance in the written 
instructions required in the 
Emission Warranty Parts List (see 
below) must be warranted for the 
warranty period defined in 
Subsection COVERAGE BY STIHL 
INCORPORATED, see above. If 
any such part fails during the period 
of warranty coverage, it must be 
repaired or replaced by the 
manufacturer according to...