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SP 451, SP 481

English

27

Engine

STIHL single cylinder two-stroke engine

SP 451

SP 481

Ignition System

Electronic magneto ignition

Fuel System

All position diaphragm carburetor with 
integral fuel pump

Weight

Hook

Length

Noise and Vibration Data

Noise measurements include idling and 
rated maximum speed, vibration 
measurements idling and full load with 
the same duration of exposure in each 
case.

For further details on compliance with 
Vibration Directive 2002/44/EC see 
www.stihl.com/vib/

Tool: Hook

Sound pressure level L

peq

 to 

ISO 11201

Sound power level L

weq

 to ISO 3744

Vibration measurement a

hv,eq

 to 

ISO 20643

The K-factor in accordance with 
Directive 2006/42/EC is 2.5 dB(A) for 
the sound pressure level and sound 
power level; the K-factor in accordance 
with Directive 2006/42/EC is 2.0 m/s

2

 

for the vibration measurement.

REACH

REACH is an EC regulation and stands 
for the Registration, Evaluation, 
Authorisation and Restriction of 
Chemical substances.

For information on compliance with the 
REACH regulation (EC) No. 1907/2006 
see www.stihl.com/reach.

Specifications

Displacement:

44.3 cm

3

Bore:

42 mm

Stroke:

32 mm

Engine power to 
ISO 8893:

2.1 kW (2.9 HP) 
at 9,000 rpm

Cut-off speed 
(rated):

12,500 rpm

Idle speed:

2,800 rpm

Displacement:

48.7 cm

3

Bore:

44 mm

Stroke:

32 mm

Engine power to 
ISO 8893:

2.2 kW (3.0 HP) 
at 9,000 rpm

Cut-off speed 
(rated):

12,500 rpm

Idle speed:

2,800 rpm

Spark plug (resistor 
type):

Bosch WSR 6 F, 
NGK BPMR 7 A

Electrode gap:

0.5 mm

Fuel tank capacity:

0.67 l

Overall weight, dry, with 
harness: 13.9 kg
Powerhead, dry:

12.8 kg

Shaft with hook:

1.1 kg

Opening:

42 mm

Stroke:

45 mm

Strokes per minute at 
12,500 rpm:

3328

Overall length:

2865 mm

Shaft with hook:

1860 mm

SP 451:

102 dB(A)

SP 481:

102 dB(A)

SP 451:

113 dB(A)

SP 481:

113 dB(A)

Handle, left

Handle, 
right

SP 451:

5.7 m/s

2

5.7 m/s

2

SP 481:

5.7 m/s

2

5.7 m/s

2

Содержание SP 451

Страница 1: ...STIHL SP 451 481 Instruction Manual...

Страница 2: ......

Страница 3: ...es concerning your machine Your Hans Peter Stihl Guide to Using this Manual 2 Safety Precautions and Working Techniques 2 Using the Unit 6 Assembling the Unit 7 Adjusting the Throttle Cable 8 Fuel 8 F...

Страница 4: ...tion that might be aggravated by strenuous work check with your doctor before operating a power tool Persons with pacemakers only The ignition system of your power tool produces an electromagnetic fie...

Страница 5: ...ver fuel spillage and damage Fueling Always shut off the engine before refueling Do not fuel a hot engine fuel may spill and cause a fire Open the fuel cap carefully to allow any pressure build up in...

Страница 6: ...thrown objects or contact with the shaft and hook do not allow other persons within a radius of 10 meters of your own position even when starting Do not drop start the power tool start the engine as d...

Страница 7: ...er grown terrain Take special care in slippery conditions damp slopes fruit on the ground and on uneven ground Watch out for obstacles Watch out for tree stumps roots and fallen fruit to avoid stumbli...

Страница 8: ...IHL replacement parts They are specifically designed to match your model and meet your performance requirements To reduce the risk of injury always shut off the engine before carrying out any maintena...

Страница 9: ...t line N Push back the hand guard 2 to expose the thread 3 on the pushrod N Hold the hand guard in this position and screw the shaft 1 onto the pushrod s thread by hand as far as stop N Position the 2...

Страница 10: ...engine requires a mixture of gasoline and engine oil STIHL MotoMix STIHL recommends the use of STIHL MotoMix This ready to use fuel mix contains no benzol or lead has a high octane rating and ensures...

Страница 11: ...uel for a few weeks work Do not store fuel mix for longer than 3 months Exposure to light the sun low or high temperatures can quickly make the fuel mix unusable N Thoroughly shake the mixture in the...

Страница 12: ...in the tank N Fill up with fuel and close the filler cap Control Handle Controls 1 Throttle trigger lockout 2 Throttle trigger 3 Slide control Positions of slide control 4 STOP 0 engine off the igniti...

Страница 13: ...e on the underside of the powerhead and the machine support under the front handle Check that the hook is not touching the ground of any other obstacles N Make sure you have a firm footing N Hold the...

Страница 14: ...e N Select the starting throttle position N Start the engine by pulling the starter rope briskly 10 to 20 pulls may be necessary If the engine still does not start N Move the slide control to STOP 0...

Страница 15: ...n Empty the fuel tank and keep the machine in a dry place well away from sources of ignition until you need it again For longer out of service perionds see Storing the Machine Using a harness STIHL re...

Страница 16: ...tening the harness straps N Pull the end of the strap down to tighten the strap Loosening the harness straps N Press the sliding adjuster down to loosen the strap N Adjust the length of the straps so...

Страница 17: ...hat it rests on the guard plate and the machine support under the front handle Make sure the hook is not touching the ground or any other obstacles N Push back the hand guard 1 to expose the hexagon e...

Страница 18: ...ed screws within fine limits Standard Setting N Stopping the Engine N Check the air filter and replace it if necessary N Check that the throttle cable is properly adjusted readjust if necessary see ch...

Страница 19: ...Hook runs when engine is idling N Turn the idle speed screw LA counterclockwise until the hook stops moving and then rotate the screw another 1 2 to 1 turn in the same direction Erratic idling behavio...

Страница 20: ...wn firmly If engine running behavior is unsatisfactory even though the air filter is clean and the carburetor and throttle cable are properly adjusted the cause may be the muffler Have the muffler che...

Страница 21: ...e grip N Pull the rope through the rotor and secure it with a simple overhand knot N Coat rope rotor bearing bore with non resinous oil see Special Accessories N Slip the rotor over the starter post t...

Страница 22: ...ng pops out of the housing during installation Refit it clockwise starting outside and working inwards N Fit the screws N Refit the rope rotor as described in Replacing the Starter Rope N Tension the...

Страница 23: ...ook Removing the rubber element N Use a suitable tool to pry the clips 1 out of the hook 2 N Do not re use damaged or bent clips Always fit new ones N Cut the worn rubber element 3 so that it can be e...

Страница 24: ...HL recommends that you have servicing and repair work carried out exclusively by an authorized STIHL servicing dealer Antivibration System AV system Rubber elements are installed in the machine to red...

Страница 25: ...ction condition leaks X X Clean X Control handle Check operation X X Air filter Clean X X Replace X Pickup body in fuel tank Check X Replace X X X Fuel tank Clean X X X Carburetor Check idle adjustmen...

Страница 26: ...mends that this work be done by a STIHL servicing dealer The following intervals apply to normal operating conditions only If your daily work ing time is longer or operating conditions are difficult v...

Страница 27: ...ervicing dealer STIHL recommends that you have servicing and repair work carried out exclusively by an authorized STIHL servicing dealer STIHL dealers are regularly given the opportunity to attend tra...

Страница 28: ...ble 14 Control handle 15 Throttle trigger lockout 16 Slide control 17 Throttle trigger 18 Filler plug 19 Pushrod 20 Fuel filler cap 21 Carburetor adjusting screws 22 Starter grip 23 Decompression valv...

Страница 29: ...he vibration measurement REACH REACH is an EC regulation and stands for the Registration Evaluation Authorisation and Restriction of Chemical substances For information on compliance with the REACH re...

Страница 30: ...e only use replacement parts which have been approved by STIHL for this power tool or are technically identical Only use high quality replacement parts in order to avoid the risk of accidents and dama...

Страница 31: ...with the highest quality standards An independent organization has certified that all products manufactured by STIHL meet the strict requirements of the ISO 9001 standard for quality management syste...

Страница 32: ...www stihl com 04584180121A 0458 418 0121 A 0458 418 0121 A englisch G...

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