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Stihl FS 311 Instruction Manual Download Page 29

16.1

Adjusting Idle Speed

0000-GXX-0495-A0

Engine stops while idling

► Warm up the engine for about 3 minutes.

► Turn the idle speed screw (LA) slowly clock‐

wise until the engine runs smoothly – the cut‐

ting attachment must not run.

Cutting attachment runs when engine is idling

► Turn the idle speed screw (LA) slowly counter‐

clockwise until the cutting attachment stops

running and then turn the screw about another

1/2 to 3/4 turn in the same direction.

WARNING

If the cutting attachment continues to run when

the engine is idling, have your machine checked

and repaired by your servicing dealer.

17 Spark Plug

► If the engine is down on power, difficult to start

or runs poorly at idle speed, first check the

spark plug.

► 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 STIHL – see "Specifica‐

tions".

17.1

Removing the Spark Plug

3

2

1

0000-GXX 0537-A0

► Remove the cover (1).

► Pull off the spark plug boot (2).

► Unscrew the spark plug (3).

17.2

Checking the Spark Plug

000BA039 KN

A

► Clean dirty spark plug.

► Check electrode gap (A) and readjust if neces‐

sary – see "Specifications".

► Rectify the problems which have caused foul‐

ing of the spark plug.

Possible causes are:

–

Too much oil in fuel mix.

–

Dirty air filter.

–

Unfavorable running conditions.

1

000BA045 KN

WARNING

Arcing may occur if the adapter nut (1) is loose

or missing. Working in an easily combustible or

explosive atmosphere may cause a fire or an

explosion. This can result result in serious inju‐

ries or damage to property.
► Use resistor type spark plugs with a properly

tightened adapter nut.

17.3

Installing the Spark Plug

► Screw the spark plug (3) into the cylinder.

► Tighten down the spark plug (3) with the com‐

bination wrench.

► Press the boot (2) firmly onto the spark plug.

► Fit the cover (1) and screw it down firmly.

18 Storing the Machine

For periods of about 3 months or longer

17 Spark Plug

English

0458-433-0121-B

29

Summary of Contents for FS 311

Page 1: ...STIHL FS 311 Instruction Manual 2 36...

Page 2: ...ncerning this product Your Dr Nikolas Stihl 1 Guide to Using this Manual 1 1 Pictograms The meanings of the pictograms attached to the machine are explained in this manual Depending on the model conce...

Page 3: ...t must not operate a power tool Depending on the cutting attachment fitted use your power tool only for cutting grass wild growth shrubs scrub bushes small diameter trees and similar materials The mac...

Page 4: ...the fuel cap as tightly as possible This helps reduce the risk of unit vibrations caus ing an incorrectly tightened fuel cap to loosen or come off and spill quantities of fuel Check for leaks Do not...

Page 5: ...ot exhaust gases and hot muffler surfaces risk of fire 2 6 Holding and guiding the machine Always hold the unit firmly with both hands on the handles Make sure you always have a firm and secure footin...

Page 6: ...not be con trolled in this position To reduce the risk of injury from ejec ted objects never operate the unit without the correct deflector for the type of cutting attachment being used Check the work...

Page 7: ...achment ensure that the diameter of your metal cutting attachment is not too big Also the attachment must not be too heavy It must be made of high quality materials and have a suitable geometry shape...

Page 8: ...elements at regular intervals 2 12 Symbols on Deflectors An arrow on the deflector shows the correct direction of rotation of the cutting attachments Some of the following symbols are applied to the...

Page 9: ...uip the mowing head only with nylon line as described in the instruction leaflets WARNING Never use wire in place of the nylon mowing line risk of injury 2 16 STIHL Polycut Mowing Head with Polymer Bl...

Page 10: ...chment comes into contact with a solid object 2 18 Grass Cutting Blade 000BA020 KN Use for grass and weeds only sweep the brushcutter in an arc like a scythe WARNING Improper use may damage the grass...

Page 11: ...ion when using this method of cutting The higher the cutting attach ment is off the ground the greater the risk of injury from cuttings being thrown sideways Warning Improper use may damage the shred...

Page 12: ...IHL recommends that you use the non sha ded area of the circular saw blade Always start the cut with this area of the blade 3 Approved Combinations of Cutting Attachment Deflector Limit Stop and Harne...

Page 13: ...lar saw blade 200 22 HP chisel tooth 4000 WARNING Non metal grass cutting blades brush knives shredder blades and circular saw blades are not permitted 3 3 Deflectors limit stop 14 Deflector for mowin...

Page 14: ...tube Tighten down the clamp screw 3 firmly 9 5 7 8 4 9 0000 GXX 0525 A0 6 7 Take out the screw 5 the nut 6 remains in the control handle 7 Push the control handle onto the handlebar 4 until the holes...

Page 15: ...t the throttle trigger to the full throttle posi tion Carefully rotate the screw in the throttle trigger in the direction of the arrow until you feel initial resistance Then rotate it another half tur...

Page 16: ...cing power tool on the ground 002BA406 KN Shut off the engine Lay your power tool on its back so that the cut ting attachment mounting face is pointing up 7 2 Use the Right Guard Ring Your power tool...

Page 17: ...replace a thrust plate if the guard washer is missing 7 5 Cleaning Gearbox Mounting Hardware for Cutting Attach ment 002BA407 KN 1 2 3 4 NOTICE Check inside of guard ring 4 and area around it for dirt...

Page 18: ...Attachments Keep the leaflet and packaging of the metal cut ting attachment in a safe place WARNING Wear protective gloves to reduce the risk of direct contact with the sharp cutting edges Mount only...

Page 19: ...ware off the gearbox 7 12 Mounting Shredder Blade 270 2 Notice on new machines that come standard with a mowing head only In addition to the shredder blade mounting kit a shredder blade retrofit kit i...

Page 20: ...e It is availa ble from your servicing dealer Change the guard ring Recommendation The guard ring must be mounted with particular care Have this work per formed by your servicing dealer STIHL recom me...

Page 21: ...octane rating and ensures that you always use the right mix ratio STIHL MotoMix uses STIHL HP Ultra two stroke engine oil for an extra long engine life MotoMix is not available in all markets 8 2 Mix...

Page 22: ...ghly shake the mixture in the canister before fueling your machine WARNING Pressure may build up in the canister open it carefully Clean the fuel tank and canister from time to time Dispose of remaini...

Page 23: ...Find the right attachment point for the cutting attachment you are using see Balancing the Brushcutter 11 Balancing the Machine The unit is balanced differently depending on the cutting attachment use...

Page 24: ...automatically to the Run position when it is released The ignition is switched on again after the engine stops the engine is then ready to start 12 2 Starting the Engine 0000 GXX 0478 A0 Press the man...

Page 25: ...A0 Press down the throttle trigger lockout and open the throttle the choke knob moves to the run position F After a cold start warm up the engine by opening the throttle several times WARNING There i...

Page 26: ...13 1 Using Transport Guard The type of transport guard depends on the metal cutting attachment supplied with the machine Transport guards are available as spe cial accessories 13 2 230 mm Grass Cuttin...

Page 27: ...Circular Saw Blades 681BA302 KN 681BA275 KN 1 2 Disconnect wire rod from the transport guard 681BA276 KN Swing wire rod outwards Fit transport guard on saw blade from below making sure the limit stop...

Page 28: ...ition carburetor from thermal overload 14 3 After Finishing Work Storing for a short period Wait for the engine to cool down Empty the fuel tank and keep the machine in a dry place well away from sour...

Page 29: ...L see Specifica tions 17 1 Removing the Spark Plug 3 2 1 0000 GXX 0537 A0 Remove the cover 1 Pull off the spark plug boot 2 Unscrew the spark plug 3 17 2 Checking the Spark Plug 000BA039 KN A Clean di...

Page 30: ...rent blade 2 in any way See cutting attachment packaging for additional sharpening instructions Keep the packaging for future reference 19 1 Balancing After resharpening about 5 times check the cuttin...

Page 31: ...er blade on the deflec tor Rotating the spool from one stop to the next advances about 4 cm 1 1 2 in of fresh line 20 4 Replacing Nylon Line STIHL PolyCut Precut lengths of nylon line can be fitted to...

Page 32: ...ave repaired by a spe cialist dealer1 X Fuel pickup body in fuel tank Have checked by dealer1 X Have replaced by serv icing dealer1 X X X Fuel tank Clean X X Carburetor Check idle adjustment cutting a...

Page 33: ...onsequential damage caused by continuing to use the product with defective components 22 1 Maintenance Work All the operations described in the Maintenance Chart must be performed on a regular basis I...

Page 34: ...gger 9 Stop switch 10 Throttle trigger lockout 11 Bike handle handlebar 12 Clamp screw 13 Carrying strip 14 Choke knob 15 Air filter cover 16 Fuel tank Serial number 1 002BA412 KN 2 3 1 Mowing head 2...

Page 35: ...with mowing head 110 dB A with metal tool 110 dB A 24 6 3 Vibration level ahv eq to ISO 22867 Handle left Handle right with mowing head 2 2 m s2 2 8 m s2 with metal tool 2 9 m s2 2 9 m s2 The K factor...

Page 36: ...approved disposal site for envi ronment friendly recycling Contact your STIHL servicing dealer for the lat est information on waste disposal 27 EC Declaration of Con formity ANDREAS STIHL AG Co KG Bad...

Page 37: ...27 EC Declaration of Conformity English 0458 433 0121 B 37...

Page 38: ...English 27 EC Declaration of Conformity 38 0458 433 0121 B...

Page 39: ...27 EC Declaration of Conformity English 0458 433 0121 B 39...

Page 40: ...www stihl com 04584330121B 04584330121B 0458 433 0121 B 0458 433 0121 B...

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