Table of Contents
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Table of Contents
Related Manuals for Stihl SP 451
Summary of Contents for Stihl SP 451
- Page 1 STIHL SP 451, 481 Instruction Manual...
- Page 3 Rewind Spring Storing the Machine Inspection and Maintenance by User Inspections and Maintenance by Dealer Maintenance and Care Minimize Wear and Avoid Damage Main Parts Specifications Special Accessories Maintenance and Repairs EC Declaration of Conformity Quality Certification SP 451, SP 481...
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Page 4: Guide To Using This Manual
Only mount tools and accessories that are explicity approved for this power tool The user is responsible for avoiding by STIHL or are technically identical. If injury to third parties or damage to their you have any questions in this respect, property. - Page 5 Gasoline is an ing objects. Wear a face STIHL recommends the use of original extremely flammable shield and safety STIHL replacement parts. They are fuel. Keep clear of naked glasses.
- Page 6 STIHL recommends a STIHL Your power tool produces servicing dealer. For emergencies: Practise removing...
- Page 7 Seek medical advice immediately if any engine start and injury, always shut off overheating and damage to important of the following symptoms appear: the engine before replacing the hook components (e.g. clutch, polymer and shaft. SP 451, SP 481...
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Page 8: Using The Unit
Use only a spark plug of the type Service the machine regularly. Do not approved by STIHL and make sure it is attempt any maintenance or repair work in good condition – see "Specifications". not described in the instruction manual. -
Page 9: Assembling The Unit
– the parts form a straight line. anitivibration system will be Make sure the ends of the shaft bypassed – see also section on and pushrod are clean. "Vibrations" in "Safety Precautions and Working Techniques". SP 451, SP 481... -
Page 10: Fuel
Hold the pushrod steady with the assembled. STIHL MotoMix 27mm wrench and tighten down the shaft firmly. STIHL recommends the use of STIHL MotoMix. This ready-to-use fuel mix Removing the Shaft contains no benzol or lead, has a high octane rating and ensures that you The shaft can be removed again to save always use the right mix ratio. -
Page 11: Fueling
Fuel mix ages – only mix sufficient fuel If STIHL two-stroke engine oil is not for a few weeks work. Do not store fuel available, use only quality two-stroke oil mix for longer than 3 months. -
Page 12: Starting / Stopping The Engine
F – normal run position – the engine the hose. is running or can start START – the ignition is switched on Do not kink the fuel hose – do not – the engine can start use any sharp or pointed tools. SP 451, SP 481... - Page 13 Continue cranking until the engine underside of the powerhead and the Press the fuel pump bulb (9) at least runs. machine support under the front five times – even if the bulb is already filled with fuel. SP 451, SP 481...
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Page 14: Adjusting The Throttle Cable
"Adjusting the Throttle Cable". If the engine does not start Choke knob If you did not turn the choke knob to e quickly enough after the engine began to fire, the combustion chamber is flooded. SP 451, SP 481... -
Page 15: Operating Instructions
During break-in period Using a harness A factory-new machine should not be STIHL recommends you use the run at high revs (full throttle off load) for harness supplied with the machine the first three tank fillings. This avoids... - Page 16 Tightening the harness straps side of your body. Squat down and put the machine on the ground. Slip the harness off your left shoulder and your arm. Pull the end of the strap down to tighten the strap. SP 451, SP 481...
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Page 17: Transporting The Unit
Push back the hand guard (1) to hook. expose the hexagon ends of the shaft (2) and pushrod (3). Slip the harness off your left shoulder and your arm. Let the machine and harness fall to the ground. SP 451, SP 481... -
Page 18: Cleaning The Air Filter
(H) may be necessary element (3) – replace if dirty or if engine power is not satisfactory when damaged. operating at high altitude or at sea level. Install the filter element in the filter cover. Fit the filter cover. SP 451, SP 481... -
Page 19: Spark Plug
At high altitude only suppressed spark plugs of the repaired by your servicing dealer. type approved by STIHL – see Turn the high speed screw (H) Erratic idling behavior, engine stops "Specifications". clockwise (leaner), no further than... -
Page 20: Engine Running Behavior
Have the muffler checked by a servicing dealer for contamination (carbonization). Clean dirty spark plug. STIHL recommends that you have servicing and repair work carried out Check electrode gap (A) and exclusively by an authorized STIHL readjust if necessary – see servicing dealer. -
Page 21: Replacing The Starter Rope And Rewind Spring
– it must point counterclockwise as washer (3) and pawl (4). shown and engage the pawl's peg. The rewind spring may pop out and uncoil during this operation – take care to avoid the risk of injury. SP 451, SP 481... -
Page 22: Storing The Machine
Take one turn of the rope off the starting outside and working inwards. rotor. Fit the screws. Fit the fan housing. Refit the rope rotor as described in "Replacing the Starter Rope". Tension the rewind spring. Fit the fan housing. SP 451, SP 481... -
Page 23: Inspection And Maintenance By User
Screws and Nuts Coat the new rubber element (3) and the hook (2) thoroughly with STIHL press fluid OH 723 – see Check all accessible screws and "Special Accessories". nuts (not the carburetor adjusting Use a suitable tool to pry the clips screws) about every 25 hours of (1) out of the hook (2). -
Page 24: Inspections And Maintenance By Dealer
Maintenance Work noticeable increase in vibrations. STIHL recommends that you have servicing and repair work carried out exclusively by an authorized STIHL Correct position of clips servicing dealer. -
Page 25: Maintenance And Care
Visual Inspection Cooling inlets Clean Check Spark arresting screen in muffler Clean or replace All accessible screws and nuts (not adjust- Retighten ing screws) Check Antivibration elements Replace Visual Inspection Hook with rubber element Check tightness Replace SP 451, SP 481... - Page 26 All accessible screws and nuts (not adjust- Retighten ing screws) Check Pushrod lubrication Replenish Safety labels Replace not in all versions, market-specific STIHL recommends that this work be done by a STIHL servicing dealer SP 451, SP 481...
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Page 27: Minimize Wear And Avoid Damage
English servicing dealer. STIHL dealers are – Spark plug Minimize Wear and Avoid regularly given the opportunity to attend Damage – Components of antivibration system training courses and are supplied with the necessary technical information. Observing the instructions in this manual... -
Page 28: Main Parts
17 Throttle trigger 18 Filler plug 19 Pushrod 20 Fuel filler cap 21 Carburetor adjusting screws 22 Starter grip 23 Decompression valve 24 Spark plug boot 25 Muffler (with spark arrestor in some markets) 26 Harness Serial number SP 451, SP 481... -
Page 29: Specifications
102 dB(A) integral fuel pump Engine SP 481: 102 dB(A) Fuel tank capacity: 0.67 l Sound power level L to ISO 3744 STIHL single cylinder two-stroke engine Weight SP 451: 113 dB(A) SP 451 SP 481: 113 dB(A) Displacement: 44.3 cm... -
Page 30: Special Accessories
SP 451: 44.3 cm grip) replacement parts which have been SP 481: 48.7 cm approved by STIHL for this power tool or – STIHL gear lubricant for are technically identical. Only use high- conforms to the specifications of brushcutters quality replacement parts in order to Directives 2006/42/EC and –... -
Page 31: Quality Certification
All STIHL products comply 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 systems in terms of product development, materials purchasing, production, assembly, documentation and customer service. - Page 32 0458-418-0121-A englisch www.stihl.com *04584180121A* 0458-418-0121-A...