Stihl Fs 55 R Instruction Manual
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FS 55, FS 55 C, FS 55 R, FS 55 RCEnglish 19 Mounting the Loop Handle with Barrier Bar NFit the square nuts (1) in the barrier bar (2); the holes must line up.NPlace the clamp (3) in the loop handle (4) and position them both against the drive tube (5). NPlace the clamp (6) against the drive tube. NPlace the barrier bar (2) in position as shown. NLine up the holes. NInsert the screws (7) and tighten them down moderately against the barrier bar. NGo to Securing the Loop Handle.Mounting the Loop Handle without Barrier Bar NPlace the clamp (3) in the loop handle (4) and position them both against the drive tube (5). NPlace the clamp (6) against the drive tube. NLine up the holes. NFit washers (7) on the screws (8) and insert the screws in the holes. Fit the square nuts (1) and screw them down as far as stop. NGo to Securing the Loop Handle.Mounting the Loop Handle 2 002BA098 KN 11 5 4 002BA099 KN 2 3 6 7 4 5 002BA136 KN 1 6 1 38 78 7
FS 55, FS 55 C, FS 55 R, FS 55 RC English 20 Securing the Loop Handle NSecure the loop handle (4) approx. 8 in (20 cm) (A) forward of the control handle (9). NLine up the loop handle. NTighten down the screws firmly – lock the nuts if necessary. The sleeve (10) (not fitted on all models) must be between the loop handle and the control handle.The carrying ring comes standard with the machine or is available as a special accessory. For position of carrying ring see Main Parts. NPlace the clamp (1) against the drive tube with the tapped hole on the left (viewed from engine). NSqueeze the two ends of the clamp together and hold in that position. NInsert the M6x14 screw (2). NLine up the carrying ring. NTighten down the screw firmly. Mounting the Deflector 1Deflector for mowing attachments 2Deflector for mowing heads Deflectors (1) and (2) are both mounted to the gearbox in the same way. NPlace the deflector on the gearbox flange. NInsert the screws (3) and tighten them down firmly. 10 9 4 002BA147 KN A Fitting the Carrying Ring 002BA142 KN 1 2 1 Mounting the Deflector 002BA380 KN 2 1 3 3
FS 55, FS 55 C, FS 55 R, FS 55 RCEnglish 21 Fitting the Skirt and Blade NSlide the lower guide slot of the skirt (4) onto the deflector (1) – it must snap into position. NPush the blade (5) into the upper guide slot on the skirt and line it up with the first hole. NInsert the screw and tighten it down firmly. Preparations NLay your brushcutter on its back so that the cutting attachment mounting face is facing up. Mounting hardware for cutting attachments The mounting hardware supplied depends on the cutting attachment that comes as original equipment with the new machine. Mounting hardware is not packed with machine Only mowing heads can be mounted.NPull the hose (1) (protector for shipping) off the shaft (2). NGo to Mounting the mowing head. If you want to mount a metal cutting attachment in place of a mowing head, you will need the following additional parts: Nut (3), rider plate (4) and thrust washer (5) (special accessories). Mounting hardware is packed with machine Mowing heads and metal cutting attachments may be mounted. If the parts are packed with the machine NPull the hose (1) (protector for shipping) off the shaft (2). The nut (3), rider plate (4) and thrust wsher (5) are in the parts kit supplied with the machine. These parts must be fitted to the deflector (1) when you use a mowing head. 4 1 54 002BA103 KN Mounting the Cutting Attachment 002BA104 KN 2 002BA164 KN 13 4 5
FS 55, FS 55 C, FS 55 R, FS 55 RC English 22 NGo to Mounting the mowing head or Mounting the metal cutting attachment. If the parts are mounted to the gearbox NGo to Removing the mounting hardware. Removing the mounting hardware NBlock the shaft – see next chapter on Blocking the output shaft. NUse the combination wrench (6) – comes standard with machine or is available as special accessory – to unscrew the nut (3) clockwise (left- hand thread) from the shaft (2). NPull the thrust washer (5) off the shaft (2). The rider plate (4) is in the parts kit supplied with the machine.NGo to Mounting the mowing head or Mounting the metal cutting attachment. Blocking the output shaft NInsert the stop pin (7) or screwdriver – come standard with machine or are available as special accessories – in the hole (8) in the gearbox as far as stop, and apply slight pressure. NRotate the nut or cutting attachment on the shaft (2) until the stop pin slips into position and blocks the shaft. Attaching the mowing head Keep the information sheet for the mowing head in a safe place. STIHL SuperCut 20-2, STIHL AutoCut 25-2, STIHL AutoCut C 25-2, STIHL TrimCut 31-2, STIHL FixCut 25-2, STIHL PolyCut 20-3 NTurn the mowing head counterclockwise until it is flush against the shaft (1) NBlock the shaft NTighten the mowing head Removing the mowing head NBlock the shaft STIHL SuperCut 20-2, STIHL AutoCut 25-2, STIHL AutoCut C 25-2, 7 82002BA166 KN7 Remove the tool used to block the shaft. 1 002BA081 KN
FS 55, FS 55 C, FS 55 R, FS 55 RCEnglish 23 STIHL TrimCut 31-2, STIHL FixCut 25-2, STIHL PolyCut 20-3 NTurn the mowing head clockwise Feed out mowing line STIHL SuperCut Line is fed out automatically if the mowing line is at least2 1/2 in. (6 cm) long – the blade on the deflector shortens excessively long mowing line to optimum length. STIHL AutoCut NHold the mowing head parallel above the surface of the lawn – tap it on the ground – approx. 1 1/4 in. (3 cm) of mowing line is fed out The blade on the deflector shortens excessively long mowing line to optimum length – thus repeated tapping in succession is to be avoided! Mowing line is only fed out if both mowing lines are still at least 1in. (2.5 cm) long! For all other mowing lines Proceed as described in the mowing head information sheet. Replacing mowing line and/or cutting blade Proceed as described in the mowing head information sheet. Mounting metal cutting attachments The skirt and line limiting blade are not required on the deflector for grass cutting blades 230-4 (1) and 230-8 (2) or the brush knife (3) – see Mounting the Deflector. If your new brushcutter came equipped with a metal cutting attachment, the correct thrust plate (5) will already be mounted. NPut your brushcutter on the ground – cutting attachment mounting face must point up. Cutting edges of grass cutting blade (1) may point in either direction. Cutting edges of grass cutting blade (2) must point clockwise.NPlace the cutting attachment (4) on the thrust plate (5). NFit the thrust washer (6) and rider plate (7) on the shaft (8). NBlock the shaft and screw the mounting nut (9) on to the shaft counterclockwise and tighten it down firmly. Always switch off the engine to fed out mowing line by hand – otherwise there is a risk of injury! Use the optional special thrust plate (5, next illustration) for metal cutting attachments – have your servicing dealer check the machine if necessary. Direction of rotation is indicated by an arrow on the inside of the deflector. 12681BA108 KN Collar (see arrow) must engage the cutting attachments mounting hole. If the mounting nut turns too freely, fit a new one. 681BA051 KN 6 9 7 8 5 4
FS 55, FS 55 C, FS 55 R, FS 55 RC English 24 Removing the metal cutting attachment NBlock the drive shaft. NUnscrew the mounting nut clockwise. NTake the parts off the shaft – do not remove the thrust plate (5).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 quality two-stroke air cooled engine oil. Use mid-grade unleaded gasoline with a minimum octane rating of 89 (R+M/2). If the octane rating of the mid-grade gasoline in your area is lower, use premium unleaded fuel. Fuel with a lower octane rating may increase engine temperatures. This, in turn, increases the risk of piston seizure and damage to the engine. The chemical composition of the fuel is also important. Some fuel additives not only detrimentally affect elastomers (carburetor diaphragms, oil seals, fuel lines, etc.), but magnesium castings and catalytic converters as well. This could cause running problems or even damage the engine. For this reason STIHL recommends that you use only high-quality unleaded gasoline! Gasoline with an ethanol content of more than 10% can cause running problems and major damage in engines with a manually adjustable carburetor and should not be used in such engines. Engines equipped with M-Tronic can be run on gasoline with an ethanol content of up to 25% (E25). Use only STIHL two-stroke engine oil or equivalent high-quality two-stroke engine oils that are designed for use only in air cooled two-cycle engines.We recommend STIHL HP Ultra 2-Cycle Engine Oil since it is specially formulated for use in STIHL engines. Do not use BIA or TCW rated (two- stroke water cooled) mix oils or other mix oils that state they are for use in both water cooled and air cooled engines (e.g., outboard motors, snowmobiles, chain saws, mopeds, etc.). Take care when handling gasoline. Avoid direct contact with the skin and avoid inhaling fuel vapor. When filling at the pump, first remove the canister from your vehicle and place the canister on the ground before filling. Do not fill fuel canisters that are sitting in or on a vehicle. The canister should be kept tightly closed in order to avoid any moisture getting into the mixture. The machine‘s fuel tank and the canister in which fuel mix is stored should be cleaned as necessary. Fuel mix ages Only mix sufficient fuel for a few days work, not to exceed 3 months of storage. Store in approved fuel-canisters only. When mixing, pour oil into the canister first, and then add gasoline. Close the canister and shake it vigorously by hand to ensure proper mixing of the oil with the fuel. Fuel
FS 55, FS 55 C, FS 55 R, FS 55 RCEnglish 25 Dispose of empty mixing-oil canisters only at authorized disposal locations. Before fueling, clean the filler cap and the area around it to ensure that no dirt falls into the tank. Always thoroughly shake the mixture in the canister before fueling your machine.The type and style of the harness depend on the market. The use of the shoulder strap is described in the chapter on Approved Combinations of Cutting Attachment, Deflector, Handle and Harness. Shoulder strap NPut on the shoulder strap (1). NAdjust the length of the strap so that the spring hook (2) is about a hand’s width below your right hip. NBalance the trimmer/brushcutter. Gaso- lineOil (STIHL 50:1 or equiva- lent high-quality oils) US gal. US fl.oz 12.6 2 1/2 6.4 512.8 Fueling In order to reduce the risk of burns or other personal injury from escaping gas vapor and fumes, remove the fuel filler cap carefully so as to allow any pressure build- up in the tank to release slowly. After fueling, tighten fuel cap as securely as possible by hand. 232BA046 KN Fitting the Harness
FS 55, FS 55 C, FS 55 R, FS 55 RC English 26 Full harness NPut on the full harness (1). NAdjust the length of the strap so that the spring hook (2) is about a hand’s width below your right hip. NBalance the trimmer/brushcutter.The type and style of the harness and carabiner (spring hook) depend on the market. The carrying ring is integrated in the control handle on loop-handled units– see Main Parts. Loop-handled units do not need to be balanced. Attaching the unit to the harness NAttach the carabiner (1) to the carrying ring (2) on the drive tube.NLoosen the screw (3). Floating position NMowing heads and grass cutting blades should just touch the ground. Proceed as follows to adjust the floating position: NMove the carrying ring up or down the drive tube – tighten the screw moderately – let the unit go and wait until is its balanced – then check the floating position. Balancing the Trimmer/Brushcutter 1 2 1 2 002BA311 KN 002BA313 KN
FS 55, FS 55 C, FS 55 R, FS 55 RCEnglish 27 When the correct floating position has been reached: NTighten down the screw on the carrying ring firmly. Detaching the unit from the harness NPress down the bar on the carabiner (1) and pull the carrying ring (2) out of the carabiner. Version with bike handle Controls 1Throttle trigger lockout 2Throttle trigger 3Slide control Positions of slide control 4 START – the ignition is switched on – the engine can start 5F – normal run position – the engine is running or can start 6STOP-0 – engine off – the ignition is switched offSymbol on slide control 7h – stop symbol and arrow. To stop the engine, push the slide control in the direction of the arrow on the stop symbol (h) to STOP-0. Starting NPress down the trigger lockout lever and squeeze the throttle trigger. Nand hold them in that position. NMove the slide control to START and hold it there. NNow release the throttle trigger, slide control and trigger lockout in that order. This is the starting throttle position. NGo to All versions. 1 2 1 2 002BA312 KN Starting / Stopping the Engine 1 4 5 6 73 2 STOP 233BA037 KN
FS 55, FS 55 C, FS 55 R, FS 55 RC English 28 Version with loop handle Controls 1Stop switch 2Throttle trigger lockout 3Throttle trigger 4Tongue of throttle trigger 5Catch Positions of stop switch 6I – normal run position – the engine can start or is running 70 – Stop – engine off – the ignition is switched offStarting NMove the stop switch to I. NPress down the throttle trigger lockout and hold it there. NSqueeze the throttle trigger until the catch on the tongue (4) can be engaged on the housing. NNow release the throttle trigger, tongue and trigger lockout in that order. This is the starting throttle position. NGo to All versions.All versions NSet the choke lever (8) to NPress the fuel pump bulb (9) at least five times – even if the bulb is already filled with fuel. 2 233BA048 KN 167 54 3233BA049 KN 4 gif the engine is cold efor warm start – also use this posi- tion if the engine has been running but is still cold. 9 8 232BA011 KN