Stihl 45 C Owners Manual

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9
WARNING
WARNING
If the vegetation being cut or the 
surrounding ground is coated with a 
chemical substance (such as an active 
pesticide or herbicide), read and follow 
the instructions and warnings that 
accompanied the substance at issue.
WARNING
Inhalation of certain dusts, especially 
organic dusts such as mold or pollen, 
can cause susceptible persons to have 
an allergic or asthmatic reaction. 
Substantial or repeated inhalation of 
dust and other airborne contaminants, in...

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10
WARNING
If the cutting tool becomes clogged or 
stuck, always turn off the engine and 
make sure the cutting tool has stopped 
before cleaning. Grass, weeds, etc. 
should be cleaned off the cutting tool at 
regular intervals.
Check the cutting blades at regular short 
intervals during operation, or 
immediately if there is a noticeable 
change in cutting behavior:
–Shut off the engine.
–Wait until the cutting blades have 
come to a complete standstill.
–Check condition and tightness,...

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11 MAINTENANCE, REPAIR AND 
STORING
Maintenance, replacement, or repair of 
the emission control devices and 
systems may be performed by any 
nonroad engine repair establishment or 
individual. However, if you make a 
warranty claim for a component which 
has not been serviced or maintained 
properly or if nonapproved replacement 
parts were used, STIHL may deny 
coverage.
WARNING
Use only identical STIHL replacement 
parts for maintenance and repair. Use of 
non-STIHL parts may cause...

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12
Cutting Season
Observe country-specific or municipal 
rules and regulations for cutting hedges.
Do not use your power tool during other 
people's normal rest periods.
Cutting Sequence
Use lopping shears or a chain saw to cut 
out thick branches first.
Cut both sides of the hedge first, then 
the top.
Disposal
Do not throw cuttings in the garbage can 
– they can be composted!
Working Technique
Vertical Cut
Swing the cutting blade from the bottom 
upwards in an arc – lower the nose of...

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13 This engine is certified to operate on 
unleaded gasoline and the STIHL two-
stroke engine oil at a mix ratio of 50:1.
Your engine requires a mixture of high-
quality gasoline and two-stroke air 
cooled engine oil.
Use mid-grade unleaded gasoline with a 
minimum octane rating of 89 ((R+M)/2) 
and no more than 10% ethanol content.
NOTICE
Fuel with an octane rating below 89 may 
increase engine temperatures. This, in 
turn, increases the risk of piston seizure 
and damage to the engine....

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14 The machine‘s fuel tank should be 
cleaned as necessary.
Fuel mix ages
If not using MotoMix, only mix sufficient 
fuel for a few days of work, not to exceed 
30 days of storage. Store in approved 
fuel-containers only. When mixing, pour 
oil into the container first, and then add 
gasoline. Close the container and shake 
it vigorously by hand to ensure proper 
mix of oil and gasoline.
Dispose of empty mixing-oil containers 
only at authorized disposal locations.Before fueling, clean the...

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15 NPress the manual fuel pump 
bulb (6) at least five times – even if 
the bulb is filled with fuel.
Cranking
NPlace the unit on the ground.
NRemove the blade scabbard. Check 
that the cutting blades are not 
touching the ground or any other 
obstacles.
NMake sure you have a safe and 
secure footing.
NHold the unit firmly with your left 
hand on the front handle and press 
down.
NPull the starter grip slowly with your 
right hand until you feel it engage 
and then give it a brisk strong...

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16 If fuel tank has been run completely dry 
and then refueled
NPress the manual fuel pump 
bulb (6) at least five times – even if 
the bulb is filled with fuel.
NNow start the engine.
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...

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17 NRemove the foam element (3) and 
felt element (4).
NWash the foam element in a clean, 
non-flammable solution (e.g. soapy 
water) and then dry.
NFit a new felt 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 any damaged parts.
NFit the foam element (3) in the filter 
cover (2) and the felt element (4) in 
the filter housing (5).
NClose the filter cover so that it snaps 
into position.Exhaust...

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18
Adjusting Idle Speed
NCarry out the standard setting.
NStart and warm up the engine.
NAdjust idle speed with the idle speed 
screw (LA) so that the cutting 
blades do not run.
Engine stops while idling
NTurn the idle speed screw (LA) 
slowly clockwise until the engine 
runs smoothly – the cutting blades 
must not run.
Cutting blades run when engine is idling
NTurn the idle speed screw (LA) 
counterclockwise until the cutting 
blades stop moving – then turn it 
another 1/2 to 1 turn in...