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Stihl FR 350, Instruction Manual

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Stihl FR 350 Instruction Manual Download Page 12

11

FR 350, FR 450, FR 480

English

Symbols on Deflectors

An arrow on the deflector shows the 
correct direction of rotation of the cutting 
tools.

Use deflector in 
combination with 
mowing heads 
only. Do not use 
metal cutting tools.

Mowing Head with Nylon Line

Nylon line achieves a soft cut for edging 
and trimming around fence posts, trees, 
etc. – less risk of damaging tree bark.

To reduce the 

risk of injury

, 

never

 

use steel wire in place of the nylon 
cutting line.

STIHL PolyCut Cutting Head with 

Plastic Blades

The PolyCut is used for edging fields not  
bordered by posts, fences, trees or other 
obstacles.

Check wear limit marks!

If one of the marks on the PolyCut is 
worn through (arrow): To reduce the 

risk 

of injury

 from thrown parts, 

stop using 

the head immediately

. Install a new 

one.

It is important to follow the maintenance 
instructions for the PolyCut cutting head!

000BA015 KN

002BA177 KN

Summary of Contents for FR 350

Page 1: ...Instruction Manual STIH STIHL FR 350 450 480 BA_FR350_01_U_B4 book Seite 0 Dienstag 20 Januar 2004 5 35 17 ...

Page 2: ...djusting the Carburetor 31 Winter Operation 32 Checking the Spark Plug 33 Engine Running Behavior 34 Lubricating the Gearbox 34 Lubricating the Flexible Shaft 35 Replacing Starter Rope and Rewind Spring 35 Storing the Machine 38 Sharpening Metal Cutting Tools 38 Maintenance Chart 39 Minimize Wear and Avoid Damage 40 Parts and Controls 41 Specifications 43 Special Accessories 44 Maintenance and Rep...

Page 3: ...ere there is a risk of damaging the machine or its individual components Note or hint which is not essential for using the machine but may improve the operator s under standing of the situation and result in better use of the machine Note or hint on correct procedure in order to avoid damage to the environment Equipment and features This instruction manual may refer to several models with differen...

Page 4: ...nd or rent your power tool without the instruction manual Be sure that anyone using your power tool reads and understands the information contained in this manual You must be fit to work with a power tool Rested healthy and in good physical and mental condition If you have any condition that might be aggravated by strenuous work check with your doctor before operating a power tool Persons with pac...

Page 5: ...uipment Clothing must be sturdy but allow complete freedom of movement Wearsnug fitting clothing e g an overall and jacket combination do not wear a work coat Avoid loose fitting jackets scarves neckties jewellery or anything that could get caught on wood brush or rotating parts of the machine Tie up and confine long hair e g with a hair net cap hard hat etc Wear steel toed safety boots with non s...

Page 6: ...y spill and cause a fire Open the fuel cap carefully to allow any pressure build up in the tank to release slowly and avoid fuel spillage Fuel your machine in well ventilated areas outdoors only Wipe off any spilled fuel before starting and check for leakage Take care not to get fuel on your clothing If this happens change immediately Power tools come standard with either a screw type or bayonet t...

Page 7: ...kpack To reduce the risk of accidents operate your power tool only if it is in good working order Be prepared for an emergency when wearing a harness Practise quickly setting down the unit To avoid damage do not throw the machine to the ground when practising Starting the Engine Start the engine at least 3 meters from the fueling spot outdoors only Place the unit on firm ground in an open area Mak...

Page 8: ... for the first time practise opening the quick release fastener several times so that you know how it works During Operation In the event of imminent danger or in an emergency switch off the engine immediately move the slide control stop switch to 0 or d In order to reduce the risk of injury to bystanders from thrown objects always keep bystanders 15 meters away from your own position To reduce th...

Page 9: ...not smoke while operating or standing near your power tool Note that combustible fuel vapor may escape from the fuel system The dust vapor and smoke created during operation may be damaging to health Wear a suitable respirator in very dusty or smoky conditions If your power tool is subjected to unusually high loads for which it was not designed e g heavy impact or a fall always check that it is in...

Page 10: ...ghtening or modifying the shape out of balance This may cause parts of the cutting tool to come off hit the operator or bystanders at high speed and result in serious or fatal injuries When using mowing heads Mount the additional parts specified in the instruction manual to the cutting tool deflector Use the approved deflector with a properly mounted line limiting blade to ensure the nylon lines a...

Page 11: ...ly high quality replacement parts in order to avoid the risk of accidents or damage to the machine Contact a dealer if in doubt STIHL recommends the use of genuine STIHL spare parts Such parts have been optimized for the machine and the user s requirements Before starting any maintenance or repair work and before cleaning the machine always stop the engine and disconnect the spark plug boot to avo...

Page 12: ...ess risk of damaging tree bark To reduce the risk of injury never use steel wire in place of the nylon cutting line STIHL PolyCut Cutting Head with Plastic Blades The PolyCut is used for edging fields not bordered by posts fences trees or other obstacles Check wear limit marks If one of the marks on the PolyCut is worn through arrow To reduce the risk of injury from thrown parts stop using the hea...

Page 13: ...rning Improper use may damage the grass cutting blade risk of injury from thrown parts Resharpen the cutting blade according to instructions when it has dulled noticeably Brush Knife Suitable for cutting matted grass wild growth and scrub thinning young stands with a maximum stem diameter of 2 cm To reduce the risk of personal injury never attempt to cut thicker wood To cut wild growth and scrub l...

Page 14: ...e it balanced if necessary by servicing dealer Mounting the Support Frame Loosen and remove the M 10 x 40 screw 1 with lock washer 2 and plain washer 3 from the powerhead 4 Secure the support frame 5 to the powerhead with the screw lock washer and plain washer torque down to 20 Nm Installing the Flexible Shaft Remove the protective cap from one end of the shaft Push the end of the flexible shaft 1...

Page 15: ...nsert the screws 7 in the holes and screw them into the barrier bar as far as stop Go to Securing the Loop Handle Mounting the Loop Handle without Barrier Bar Place the clamp 3 in the loop handle 4 and position them both against the drive tube 5 Fit the clamp 6 and line up the holes Fit the washers 7 on the screws 8 Insert the screws in the holes and screw on the square nuts 1 as far as stop Go to...

Page 16: ...ver its whole length Do not wrap the throttle cable around the flexible shaft Throttle Cable Adjustment Go to Adjusting the Throttle Cable A properly adjusted throttle cable is the precondition for correct operation in the full throttle starting throttle and idle positions Adjust the throttle cable only after the unit is fully assembled the control handle must be in the normal operating position P...

Page 17: ... Use a suitable tool to push the slide to the bottom of the slot see illustration Press down the trigger interlock 1 and squeeze the throttle trigger 2 full throttle this sets the throttle cable correctly 002BA163 KN 2 1 002BA161 KN ...

Page 18: ...al mowing tools and brush knives Handles 17 Loop handle 18 Loop handle with 19 Barrier bar Equipment The complete unit includes Cutting tool Deflector Handle Approved Combinations Select correct combination from the table on the next page on the basis of the cutting tool For safety reasons only the tools deflectors and handles shown in each row of the table may be used together No other combinatio...

Page 19: ...0 FR 480 Cutting Tool Deflector Handle 681FK003 681FK011 6 1 681FK111 KN 7 681FK006 2 4 3 681FK037 KN 5 13 681FK023 681BA002 KN 14 15 17 002BA002 K 002BA003 K 18 19 8 681FK014 10 681FK015 12 9 11 681FK021 16 002BA003 K 18 19 ...

Page 20: ...d line it up Insert M 5 x 18 screws and tighten down firmly Fitting skirt and blade These parts must be fitted to the deflector 1 when you use a mowing head Slide the lower guide slot of the skirt 4 onto the deflector 1 it must snap into position Push the blade 5 into the upper guide slot on the skirt and line it up with the first hole Fit the screw and tighten it down firmly Attachment Applicatio...

Page 21: ...for mowing heads Pull the hose 1 protector for shipping off the shaft 2 Go to Mounting the Mowing Head If you want to mount a metal cutting tool in place of a mowing head you will need the following additional parts Nut 3 rider plate 4 and thrust washer 5 see Special Accessories Scope of supply for metal cutting tools Pull the hose 1 protector for shipping off the shaft 2 The nut 3 rider plate 4 a...

Page 22: ...d in a safe place Screw STIHL SuperCut 20 2 STIHL AutoCut 25 2 C 25 2 30 2 STIHL TrimCut 30 2 or STIHL PolyCut 20 3 counterclockwise onto the shaft 1 as far as stop Block the output shaft Tighten down the mowing head firmly Remove the tool used to block the shaft STIHL FixCut 25 2 Place the mowing head on the thrust plate 2 Collar arrow must locate in the mowing head s mounting hole Push the thrus...

Page 23: ...ting cutting head horizontal to the ground tap it on the ground about 3 cm fresh line is advanced The blade on the deflector trims over long lines to the correct length Avoid tapping the head more than once Line feed operates only if both lines still have a minimum length of 2 5 cm All other mowing heads Refer to instructions supplied with the mowing head To reduce the risk of serious injury alway...

Page 24: ...emoving Metal Cutting Tools Block the shaft Unscrew the mounting nut clockwise Take the parts off the shaft do not remove the thrust plate 7 Your engine requires a mixture of gasoline and engine oil For health reasons avoid direct skin contact with gasoline and avoid inhaling gasoline vapor STIHL MotoMix STIHL recommends the use of STIHL MotoMix This ready to use fuel mix contains no benzol or lea...

Page 25: ... oil 50 parts gasoline to 1 part oil Other high quality two stroke engine oils 25 parts gasoline to 1 part oil Examples Use a canister approved for storing fuel Pour oil into the canister first then add gasoline and mix thoroughly Storing Fuel Store fuel only in approved safety type fuel canisters in a dry cool and safe location protected from light and the sun Fuel mix ages Only mix sufficient fu...

Page 26: ...ile fueling and do not overfill the tank STIHL recommends the STIHL filler nozzle special accessory After fueling tighten down filler cap by hand as securely as possible Change the fuel pickup body once every year Drain the fuel tank Use a hook to pull the fuel pickup body out of the tank and take it off the hose Push the new pickup body into the hose Place the pickup body in the tank Fueling 256B...

Page 27: ... the quick action fastener D Adjusting backpack Close and lock the hip belt 1 and adjust so that it fits snugly against your hip Adjust harness straps 2 to correct length Use straps 3 to fix position of harness adjust to size Back padding must fit firmly and securely against your back Removing backpack Open quick action fastener on the hip belt Loosen the harness straps by lifting the sliding adju...

Page 28: ... and squeeze the throttle trigger Keep both levers in that position Move the slide control to START and hold it there Now release the throttle trigger slide control and throttle trigger interlock in that order This is the starting throttle position Set the choke knob 8 For cold start to g For warm start to e also use this setting if the engine has been running but is still cold Press fuel pump bul...

Page 29: ...frame and press down Pull the starter rope slowly with your right hand until you feel it engage and then give it a brisk strong pull Do not pull out the starter rope all the way it might otherwise break Do not let the starter grip snap back guide it slowly into the housing so that the starter rope can rewind properly When the engine begines to fire Set the choke knob to e Press button of decompres...

Page 30: ... interlock and throttle trigger to the starting throttle position Start the engine by pulling the starter rope firmly 10 to 20 pulls may be necessary If the engine still does not start Move the slide control 0 c Pull off the spark plug boot 5 Unscrew and dry off the spark plug Open the throttle wide Crank the engine several times with the starter to clear the combustion chamber Refit the spark plu...

Page 31: ...load After finishing work Storing for short period Wait for engine to cool down Drain the fuel tank and keep the unit in a dry place away from sources of ignition until you need it again Storing for a long period see chapter Storing the Machine Dirty air filters reduce engine power increase fuel consumption and make starting more difficult FR 350 If there is a noticeable loss of engine power Turn ...

Page 32: ...r it is only possible to adjust the high speed screw within fine limits Standard Setting Shut off the engine Mount approved cutting tool Check the air filter and replace if necessary Check adjustment of the throttle cable and readjust if necessary see Adjusting the Throttle Cable Turn high speed screw H counterclockwise max 3 4 turn as far as stop Carefully screw the low speed screw L down onto it...

Page 33: ... engine runs and accelerates smoothly It is usually necessary to change the setting of the idle speed screw LA after every correction to the low speed screw L Fine tuning the carburetor for operation at high altitude A slight correction may be necessary if the engine does not run satisfactorily Check standard setting Warm up the engine Turn the high speed screw H clockwise leaner Install intake ai...

Page 34: ...pping the Engine Clean dirty spark plug Check electrode gap A and readjust if necessary see Specifications Rectify the problems which have caused fouling of spark plug To much oil in fuel mix Dirty air filter Unfavorable running conditions Fit a new spark plug after about 100 operating hours or sooner if the electrodes are badly eroded Install only suppressed spark plugs of the type approved by ST...

Page 35: ...that maintenance and repair work be carried out only by authorized STIHL dealers Check grease level regularly about every 25 hours of operation Unscrew the filler plug 1 If no grease can be seen on the inside of the filler plug screw the tube 2 of STIHL gear lubricant for brushcutters see Special Accessories into the filler hole Squeeze up to 5 g grease into the gear housing Do not completely fill...

Page 36: ...ective tube 3 turn it 180 from the original installed position and push it home as far as stop Push the flexible shaft fully into the powerhead coupling 4 turn the shaft back and forth at the same time Replacing a broken starter rope Remove the screws 1 Lift away the fan housing Remove the spring clip 2 Carefully remove the rope rotor with washer 3 and pawl 4 The rewind spring may pop out and unco...

Page 37: ...ge it on the pawl s peg the spring clip must point clockwise Tensioning rewind spring Make a loop in the unwound starter rope and use it to turn the rope rotor six full revolutions counterclockwise Hold the rotor steady pull out and straighten the twisted rope Release the rope rotor Let go of rope slowly so that it winds onto the rotor The starter grip must locate firmly in the rope guide bush If ...

Page 38: ...Apply tool through the openings arrows The frame slips off in this process If the spring pops out of the housing during installation Refit it in the counterclockwise direction starting outside and working inward Fit the screw Install the rope rotor as described under Replacing a broken starter rope Tension the rewind spring Fit the fan housing FR 350 Take out the screws 9 Remove the spring housing...

Page 39: ...f children and other unauthorized persons Use a file see Special Accessories to sharpen cutting tools In case of more serious wear or nicks Resharpen with a grinder or have work done by STIHL dealer Resharpen frequently take away as little material as possible two or three strokes of the file are usually enough To avoid out of balance After resharpening about 5 times have blade checked on STIHL ba...

Page 40: ...achine Visual inspection 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 Carburetor Check idle speed X X Readjust idle X Spark plug Readjust electrode gap X Replace after 100 hours of operation Cooling inlets Inspect X Clean X All accessible screws and nuts not adjusting screws Retighte...

Page 41: ...IHL recommends that you have maintenance and repair work carried out only by an authorized STIHL servicing dealer STIHL servicing dealers are able to attend regular training courses and receive technical information bulletins on the latest engineering changes If these operations are not carried out as specified the user assumes responsibility for any damage that may occur Among other things this i...

Page 42: ...Flexible shaft 6 Cable retainer 7 Hand guard trigger 8 Throttle trigger 9 Slide control 10 Shaft disconnect lever 11 Choke knob 12 Fuel pump 13 Air filter cover 14 Fuel tank 15 Fuel filler cap 16 Antivibration elements Parts and Controls Part 1 271BA028 KN 4 5 6 8 7 1 9 2 3 11 12 15 16 16 10 271BA029 KN 13 14 ...

Page 43: ...t frame 18 Back padding 19 Harness 20 Hip belt 22 Carburetor adjusting screws 23 Starter gripf 24 Spak plug boot 25 Decompression valve 26 Muffler 27 Spark arresting screen not all markets 20 19 17 271BA030 KN 18 22 25 23 24 26 27 271BA031 KN ...

Page 44: ...68 1 FR 350 97 dB A FR 480 94 dB A 1 Weighted equivalent level includes idling and rated maximum speed with the same duration of exposure Sound power level Lweq to ISO 108841 Mowing head FR 450 111 dB A to ISO 22868 1 FR 350 109 dB A FR 480 112 dB A Metal tool FR 450 108 dB A to ISO 22868 1 FR 350 107 dB A FR 480 109 dB A Vibration measurement aeq to ISO 7916 2 Idle speed mowing head Left handle F...

Page 45: ...s Spark plug suppressed Bosch WSR 6 F NGK BPMR 7 A or Champion RCJ 6 Y not all markets Electrode gap 0 5 mm Spark plug thread M 14x1 25 9 5 mm lang Rewind Starter Starter rope 3 mm dia x 800 mm 0000 195 8200 Carburetor All position diaphragm carburetor with integral fuel pump Air filter Paper filter element Fuel tank capacity FR 350 0 64 L 640 cm3 FR 450 FR 480 0 68 L 680 cm3 Fuel mix see chapter ...

Page 46: ...on these and other special accessories Users of this machine may only carry out the maintenance and service work described in this user manual All other repairs must be carried out by a servicing dealer STIHL recommends that all maintenance and repair work be carried out by an authorized STIHL dealer STIHL dealers regularly attend training courses and are supplied with the necessary technical info...

Page 47: ...ure Done at Waiblingen October 25 2006 ANDREAS STIHL AG Co KG Elsner Director Group Product Management 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 assem...

Page 48: ...47 FR 350 FR 450 FR 480 English ...

Page 49: ...48 English FR 350 FR 450 FR 480 ...

Page 50: ...0458 271 0121 A englisch English BA_FR350_01_U_B4 book Seite 1 Dienstag 20 Januar 2004 5 35 17 ...

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