Stihl 45 C Owners Manual

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19
Checking the spark plug
NClean the spark plug if it is dirty
NCheck the electrode gap (A) and 
readjust if necessary – see 
"Specifications"
NUse only resistor type spark plugs of 
the approved range
Correct the problems that have caused 
fouling of the spark plug:
–too much oil in fuel mix,
–dirty air filter,
–unfavorable running conditions, e.g. 
operating at part throttle.
WARNING
To reduce the risk of fire and burn injury, 
use only spark plugs authorized by 
STIHL. Always...

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20 If engine running behavior is 
unsatisfactory even though the air filter 
is clean and the carburetor is properly 
adjusted, the cause may be the muffler.
Have the muffler checked for 
contamination (carbonization) by your 
servicing dealer.
STIHL recommends that you have 
servicing and repair work carried out 
exclusively by an authorized STIHL 
servicing dealer.Use STIHL gear lubricant for hedge 
trimmers (special accessory) to lubricate 
the blade drive gear.
After about 50 hours of...

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21 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.
NClean the cutting blades, check 
condition and spray with STIHL 
resin solvent.
NFit the blade scabbard.
NThoroughly clean the machine – pay 
special attention to the cylinder fins 
and air filter.
NStore...

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22
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
Control handle Check operationXX
Air...

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23
Cutting bladesCleanX
SharpenX
Visual inspectionX
Have replaced by servicing dealer
1)X
Gearbox lubricationCheck and replenish after every 50 
hours of operation
Safety labels ReplaceX
1)STIHL recommends an authorized STIHL servicing dealer.2)not in all versions, market-specific 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...

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241Rear Handle
2Throttle Trigger Lockout
3Throttle Trigger
4Fuel Tank
5Air Filter Cover
6Carburetor Adjusting Screws
7Screw Plug
8Front Handle
9Stop Switch
10Starting Throttle Lock
11Starter Grip
12Fuel Filler Cap
13Muffler
14Spark Plug Boot
15Manual Fuel Pump
16Choke Lever
17Cutting Blade Guard
18Cutting Blades
19Blade Scabbard
Main Parts
7
18
17
1913
14
15
16
12
9
10
11
8
63
2
145
253BA026 KN 

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25
Definitions
1. Rear Handle
The support handle for the hand, 
located at or toward the rear of the 
hedge trimmer.
2. Throttle Trigger Lockout
Must be depressed before the 
throttle trigger can be activated.
3. Throttle Trigger
Controls the speed of the engine.
4. Fuel Tank
For fuel and oil mixture.
5. Air Filter Cover
Covers and protects the air filter 
element.
6. Carburetor Adjusting Screws
For tuning the carburetor.
7. Screw Plug
Seals filler opening for gearbox 
grease.
8. Front...

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26
Ignition System
Electronic (breakerless) magneto 
ignition
Fuel System
All position diaphragm carburetor with 
integral fuel pump
Weight
Cutting bladesUsers 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 
using genuine STIHL replacement parts.
Genuine STIHL parts can be identified 
by the STIHL part number, the 
{ logo and, in some cases, by 
the...

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27 STIHL Incorporated Limited Warranty 
Policy
This product is sold subject to the STIHL 
Incorporated Limited Warranty Policy, 
available at 
http://www.stihlusa.com/warranty.html.
It can also be obtained from your 
authorized STIHL dealer or by calling 
1-800-GO-STIHL (1-800-467-8445).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...

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28 If you have any questions regarding your 
warranty rights and responsibilities, 
please contact a STIHL customer 
service representative at 1-800-467-
8445 or you can write to
STIHL Inc.,
536 Viking Drive, P.O. Box 2015,
Virginia Beach, VA 23450-2015
www.stihlusa.com
Coverage by STIHL Incorporated
STIHL Incorporated warrants to the 
ultimate purchaser and each 
subsequent purchaser that your small 
off-road equipment engine will be 
designed, built and equipped, at the time 
of sale, to...