Wemars WS-ST42G User manual

WS-ST42G

02ContentsIntroduction.....................................................................2Safety..............................................................................4Assembly......................................................................9Operation......................................................................13Maintenance.................................................................17Technical Data ........................................................... 19IntroductionProduct descriptionThe product is a grass trimmer with a combustionengine.Work is constantly in progress to increase your safetyand efficiency during operation. Speak to Wemarsservice for more information.Intended useThe product can be used with a trimmer head to cutgrass. Do not use the product for other tasks than grasstrimming and grass clearing.Note: National or local regulations may regulate the use.Comply to given regulations.Product overviewHarness Trimmer Head 3 T Blade Manual Mixture ContainerTroubleshooting............................................................20Bevel GearCutting Attachment GuardShaft AU HandleThrottle TriggerStop SwitchSpark Plug Shaft CouplingFuel TankAir Primer BulbChoke ControlHandle AdjustmentTrigger Lockout Starter Handle Air Filter CoverSpacerHarness EyeletShaft BKnobLock Button

Symbols on the productBe careful and use the product correctly.This product can cause serious injury ordeath to the operator or others.Read the operator's manual carefully andmake sure that you understand theinstructions before you use this product.Use a protective helmet in locations whereobjects can fall on you. Use approvedhearing protection. Use approved eyeprotection.Use approved protective gloves.Use heavy-duty slip-resistant boots.The product can cause objects to eject,which can cause injury.Maximum speed of the output shaft.
50FT
15 m
50FT
15 m
Keep a minimum of 15 m distance topersons and animals during operation of theproduct.Hex WrenchScrewdriver WrenchSpacerCatcher Allen Key Tools Bag Tools bag Choke off Fuel.03Product liabilityAs referred to in the product liability laws, we are notliable for damages that our product causes if:•the product is incorrectly repaired.•the product is repaired with parts that are not fromthe manufacturer or not approved by themanufacturer.•the product has an accessory that is not from themanufacturer or not approved by the manufacturer.•the product is not repaired at an approved servicecenter or by an approved authority.Choke onAir Primer Bulb

SafetySafety definitionsWarnings, cautions and notes are used to point outspecially important parts of the manual.WARNING: Used if there is a risk of injury ordeath for the operator or bystanders if theinstructions in the manual are not obeyed.CAUTION: Used if there is a risk of damageto the product, other materials or theadjacent area if the instructions in themanual are not obeyed.Note: Used to give more information that is necessary ina given situation.Safety instructions for operationWARNING: Read the warning instructionsthat follow before you use the product.•You must understand the difference between grassclearing and grass trimming before use.•If you encounter a situation where you are uncertainhow to proceed you should ask an expert. ContactWemars service . Avoid all usage which you you consider to be beyond your capability .•Never use a product that is faulty. Carry out thesafety checks, maintenance and service instructionsdescribed in this manual. Some maintenance andservice measures must be carried out by trained andqualified specialists. •All covers, guards and handles must be fitted beforeyou start the product. Ensure that the spark plug capand ignition lead are undamaged to avoid the risk ofelectric shock.•Never use the product if you are fatigued, whileunder the influence of alcohol or drugs, medicationor anything that could affect your vision, alertness,coordination or judgement.•Do not use the product in bad weather such asdense fog, heavy rain, strong wind, intense cold,etcetera. Working in bad weather is tiring and oftenbrings added risks, such as icy ground,unpredictable felling direction, etcetera.•The only accessories you can operate with thisengine unit are the cutting attachments that werecommend. •Never allow children to use or be in the vicinity of theproduct. As the product is equipped with a spring-loaded start/stop switch and can be started by lowspeed and force on the starter handle, even smallchildren under some circumstances can produce theforce necessary to start the product. This can meana risk of serious personal injury. Therefore removethe spark plug cap when the product is not underclose supervision.04•Running an engine in a confined or badly ventilatedarea can result in death due to asphyxiation orcarbon monoxide poisoning.•The complete clutch cover and shaft must be fittedbefore the product is started, otherwise the clutchcan come loose and cause personal injury.•Ensure that no people or animals come closer than15 m while you work. When several operators areworking in the same area the safety distance shouldbe at least 15 m. Otherwise there is a risk of seriouspersonal injury. Stop the product immediately ifanyone approaches. Never swing the productaround without first checking behind you to makesure that noone is within the safety zone.•Ensure that people, animals or other things can notaffect your control of the product or that they do notcome in contact with the cutting attachment or looseobjects that are thrown out by the cuttingattachment. However, do not the product unless youare able to call for help in the event of an accident.•Always inspect the working area. Remove all looseobjects such as stones, broken glass, nails, steelwire, string, etcetera, that could be thrown out orbecome wrapped around the cutting attachment.•Make sure that you can move and stand safely.Check the area around you for possible obstacles(roots, rocks, branches, ditches, etcetera) in caseyou have to move suddenly. Take great care whenyou work on sloping ground.

•Keep a good balance and a firm foothold at all times.Do not overreach.•Always hold the product with both hands. Hold theproduct on the right side of your body.•Keep the cutting attachment below waist level.•Switch off the engine before you move to anotherarea. Fit the transportation guard before you carry ortransport the equipment any distance.•Never put the product down with the engine runningunless you have it in clear sight.•Stop the engine and cutting equipment before youremove material that has wound around the bladeshaft. Neither the operator of the product nor anyoneelse may attempt to remove the cut material whilethe engine is running or the cutting equipment isrotating, as this can result in serious injury. Thebevel gear can get hot during use and may remainso for a while afterwards. You could get burnt if youtouch it.•Watch out for thrown objects. Always wear approvedeye protection. Never lean over the cuttingattachment guard. Stones, rubbish, etcetera, can bethrown up into the eyes which can cause blindnessor serious injury.•Sometimes branches or grass get caught betweenthe guard and cutting attachment. Always stop theengine before you clean the product.•Always slow the engine to idle speed after eachworking operation. Long periods at full throttlewithout any load on the engine can lead to seriousengine damage.•Listen out for warning signals or shouts when youwear hearing protection. Always remove yourhearing protection as soon as the engine stops.•Overexposure to vibration can lead to circulatorydamage or nerve damage in people who haveimpaired circulation. Contact your doctor if youexperience symptoms of overexposure to vibration.These symptoms include numbness, loss of feeling,tingling, pricking, pain, loss of strength, changes inskin color or condition. These symptoms normallyappear in the fingers, hands or wrists.•Do not use a product with a damaged spark plugcap.•Do not use a product with a defective muffler.•Keep all parts of your body away from the rotatingcutting attachment and hot surfaces.•Never use a product with a faulty muffler•Never start or use the product indoors, nearcombustible material or in spaces that lacks properventilation. The exhaust fumes from the enginecontain carbon monoxide, an odorless, poisonousand highly dangerous gas. Also, the exhaust fumesare hot and may contain sparks that can start a fire.Personal protective equipmentWARNING: Read the warning instructionsthat follow before you use the product.•Always use approved personal protective equipmentwhen you use the product. Personal protectiveequipment cannot fully prevent injury but itdecreases the degree of injury if an accident doesoccur. Let your dealer help you select the rightequipment.•Use a protective helmet where there is a risk offalling objects.•Use approved hearing protection that providesadequate noise reduction. Long-term exposure tonoise can result in permanent hearing impairment.•Use approved eye protection. If you use a visor, youmust also use approved protective goggles.Approved protective goggles must comply with theANSI Z87.1 standard in the USAs or EN 166 in EUcountries.•Use gloves when necessary, for example when youattach, examine or clean the cutting equipment.05

AB•Use protective boots with steel toes and non-slipsoles.•Use clothing made of a strong fabric. Always useheavy, long pants and long sleeves. Do not useloose clothing that can catch on twigs and branches.Do not wear jewelry, short pants, sandals or go withbare feet. Put your hair up safely above shoulderlevel.06•Keep first aid equipment close at hand.Safety devices on the productWARNING: Read the warning instructionsthat follow before you use the product.In this section the product’s safety features, its purposeand how checks and maintenance should be carried outto ensure that it operates correctly. See instructionsunder the heading to find where these parts are locatedon your product.The life span of the product can be reduced and the riskof accidents can increase if product maintenance is notcarried out correctly and if service and/or repairs are notcarried out professionally. If you need further informationplease contact Wemars service .WARNING: Never use a product withdefective safety components. The product'ssafety equipment must be inspected andmaintained as described in this section. Ifyour product fails any of these checks,contact Wemars service to get it repaired.CAUTION: All servicing and repair work onthe machine requires special training. This isespecially true of the machine′s safetyequipment. If your machine fails any of thechecks described below you must contactWemars service . To do a check of the throttle trigger lockoutThe throttle lockout is designed to prevent accidentaloperation of the throttle control.1.Press the throttle trigger lockout (A) and make surethat the throttle trigger (B) is released . When yourelease the handle the throttle control and the throttletrigger lockout both move back to their initialpositions. This movement is controlled by twoindependent return springs. This arrangementmeans that the throttle control is automaticallylocked at the idle setting.2.Make sure that the throttle trigger is locked at theidle setting when the throttle trigger lockout isreleased.3.Press the throttle trigger lockout and make sure thatit returns to its intial position when you release it.BＡ

4.Do a check of the throttle trigger and throttle triggerlockout move freely and that the return springs workproperly.5.Start the product and apply full throttle.6.Release the throttle and make sure that the cuttingattachment stops and remains at a standstill. If thecutting attachment rotates with the throttle in the idleposition the carburettor idle setting must be checked.See instructions under the chapter .To do a check of the stop switch1.Start the engine(I-open )2.Move the stop switch to the stop position and makesure that the engine stops.(O-stop )To do a check of the cutting attachment guardWARNING: Do not use a cutting attachmentwithout an approved and correctly attachedcutting attachment guard. WARNING: Always use the recommendedcutting attachment guard for the cuttingattachment that you use. If an incorrect orfaulty cutting attachment guard is fitted thiscan cause serious personal injury. The cutting attachment guard prevents injuries fromobjects that eject in the direction of the operator. It also07prevents injuries that occur if you touch the cuttingattachment.1.Do a visual check for damages, for example cracks.2.Replace the cutting attachment guard if it isdamaged.BBA

08To do a check of the mufflerWARNING: Bear in mind that the exhaustfumes from the engine are hot and maycontain sparks which can start a fire. Neverstart the product indoors or nearcombustible material!WARNING: Never use the product indoorsor in spaces lacking proper ventilation.Exhaust fumes contain carbon monoxide, anodorless, poisonous and highly dangerousgas.WARNING: Never use a product with afaulty muffler.The muffler keeps noise levels to a minimum and sendsexhaust fumes away from the operator.•Do a visual check for damage and deformation.•Make sure that the muffler is correctly attached tothe product.Fuel SafetyWARNING: Read the warning instructionsthat follow before you use the product.•Never start the product if you spill fuel on it. Wipe thespillage of and allow remaining fuel to evaporate.•Never start the product if you spill fuel on yourself oryour clothes. Change your clothes and wash anypart of your body that has come in contact with fuel.Use soap and water.•Never start the product if the product is leaking fuel.Check regularly for leaks from the fuel cap and fuellines.•Always put the product on a flat surface and makesure the cutting attachment cannot come in contactwith any object while you add fuel.•Take care when handling fuel. Bear in mind the riskoff fire, explosion and inhaling fumes.•Observe caution when handling fuel and make surethere is adequate ventilation. Fuel and fuel fumesare highly inflammable and can cause serious injurywhen inhaled or allowed to come in contact with theskin.•Mix and pour fuel outdoors, where there are nosparks or flames.•Do not smoke or place hot objects near fuel.•Always stop the engine and let it cool off for a fewminutes before you refuel.•Open the fuel cap slowly so that any excesspressure is released gently when you refuel.•Tighten the fuel cap carefully after you refueled.•Clean the area around the fuel cap. Contamination inthe tank can cause operating problems.•Always move the product 3m (10ft) or further fromthe refuelling area and source before starting.Safety instructions for maintenanceWARNING: Read the warning instructionsthat follow before you use the product.•Only use cutting attachments with the guards werecommend. •Always stop the engine before you do any work onthe cutting attachment. The cutting attachmentcontinues to rotate even after the throttle has beenreleased. Ensure that the cutting attachment hasstopped completely and disconnect the spark plugbefore you start to work on it.•A faulty cutting attachment may increase the risk ofaccidents.•Make sure that the trimmer cord is wound tightly andevenly around the drum, otherwise the product willgenerate harmful vibration.

AssemblyIntroductionWARNING: Before you assemble theproduct, you must read and understand thesafety chapter.1. Loosen the Handle Adjustment screws. 094.Turn the output shaft until one of the holes in thedrive disc aligns with the related hole in the gearhousing.5.Put the locking (allen key) in the hole to lock the shaft.To assemble the U handle2.Install the u handle and tighten the screws . 1.Install the grass catcher
CatcherCutting Attachment Guard
3. Tighten the screws . To assemble the cutting attachmentguard and trimmer head
U Handle
attachment guard Spacer
2. Install the spacer and attachment guard on the shaft.

106. Remove the shaft nuts clockwise by Hex wrench. Drive disc Washer Cover Nuts Drive disc Trimmer Head.Hold the allen key turn the trimmer head anti-clockwise Remove the nuts cover and washer .To assemble the two-piece shaft 1. Remove the shaft A cap 3.Align the tab of the cutting attachment (A) with thearrow of the coupling (B).B2.Turn the knob to loosen the coupling. Knob AATo assemble the 3T blade head
Drive disc Washer Cover Nuts Blade head
Hold the allen key turn the nuts anti-clockwies To assemble the trimmer head WARNING: guard all the time . If not you can’t take down the trimmer head . Keep the drive disc in the shaft

To wear the harness1. Take out harness from the package . 112. Pull the snap and open the lock .3.The rope on the back plate faces out. 5. Make sure soft side is down . the shoulder strap4 Make sure you back looks like this ..6. Make sure the board is on the right side of your body.7. Wearing the harness . (Front / Right )4.Carefully push the shaft(A) into the coupling until youhear a click.AB5.Push the coupling down and tighten the knob fully .A

121. Put the buckle through the hook. To attaching the harness G Buckle Hook 2. Loosen the hook screw and move it to the best positionBB Hook screw 3. Emergency Release Pull the red tag (G) the buckle will breaks away . 3. Maintain balance and reduce burden on hands.8. Closed the buckle.9. Adjust the rope to the best condition

13OperationFuelThis product has a two-stroke engine.CAUTION: Incorrect type of fuel can result inengine damage. Use a mixture of gasolineand two-stroke oil.GasolineCAUTION: Always use a quality gasoline/oilmixture of at least 90 octane (RON). Thereis a risk that use of lower octane gradecauses knocking. This gives rise to highengine temperature, which can result inserious engine damage.CAUTION: If your product is equipped with acatalytic converter use a good qualityunleaded gasoline/oil mixture. Leadedgasoline will destroy the catalytic converter.•Ethanol blended fuel, E10 may be used (max 10%ethanol blend). Using ethanol blends higher thanE10 will cause lean running condition which candamage the engine.•We recommend a higher octane rating when you dowork at continuous high speed.Two-stroke oilCAUTION: Unsatisfactory oil quality and/orincorrect oil/fuel ratio can damage theproduct and decrease the life time ofcatalytic converters.To mix gasoline and two-stroke oilGasoline, literTwo-stroke oil,liter4% (25:1)50.20100.40150.60200.80US gallonUS fl. oz.152 1/213525⅞CAUTION: Small errors can influence theratio of the mixture drastically when you mixsmall quantities of fuel. Measure the quantityof oil carefully and make sure that you getthe correct mixture.25:110104.Fill the gasoline with 10 scale . 6.Shake the fuel mixture.CAUTION: Do not mix fuel for more than 1month at a time.25:110102. Add the Two -stroke oil to the container with10 scale.1. Open the oil cap .3. Open the gasoline cap .5. Tighten both cap .

To fill the fuel tank1.Clean the area around the fuel tank cap.2.Shake the container and make sure that the fuel isfully mixed. 3.Fill the fuel tank.4.Tighten the fuel tank cap carefully.5.Move the product 3 m (10 ft) or more away from therefueling area and fuel source before starting.CAUTION: Contamination in the tankscauses malfunction. Clean the fuel tank regularly and replace the fuel filter one time a year or more.Before you operate the product•Examine the work area to make sure that you knowthe type of terrain. Examine the slope of the groundand if there are obstacles such as stones, branchesand ditches.•Do an overhaul inspection of the product.•Do the safety inspections, maintenance andservicing that are given in this manual.•Make sure that all covers, trimmer guard andtrimmer head correctly attached and not damaged orcracked. Replace if they are exposed to impact orcracked.WARNING: Do not use the product without aguard or a guard that is defective.To start a cold engine 3.Push the air primer bulb 6-10 times .4.Move the choke control up into choke on position.
Primer Bulb
1.Open the engine (I-open/o-stop ) 5. Pull the starter rope until the engine warm up .6. Push the choke control down into the choke off . Warm up ( Engine start / Try to start ) .14 Pull Max 6 times .2.Hold the trigger and trigger lockout press the lock button . lock button

157.Pull the starter rope again until the engine start .CAUTION: Do not pull the starter rope allthe way out and do not let go off thestarter rope handle when the starter ropeis fully extended. This can causedamage to the product.To stop the engine Stop the engine (o-stop/I-open).To start a warm engine 2.Push the air primer bulb 6-10 times .
Primer Bulb
1.Open the engine (I-open/o-stop).3.Pull the starter rope again until the engine start .4.Use the machine .9.Make sure the engine runs smoothly.8.Operate the throttle gradually when the engine starts.If the engine won’t start please back to step 2 .

About the surfaceWARNING: Do not touch the area that isidentified with gray in the illustration. Thereis a risk of burn injuries when the product ishot. There is a risk of electrical shock if thespark plug cap is damaged. Do not use aproduct that has a damaged spark plug cap.Grass trimming with a trimmer headTo trim the grass1.Hold the trimmer head immediately above theground at an angle. Do not push the trimmer line intothe grass.2.Decrease the length of the trimmer line by 10-12cm / 4-4.75 in.3.Decrease the engine speed to decrease the risk ofdamage to plants.4.Use 80 % throttle when you cut grass near objects.To cut the grass1.Make sure that the trimmer line is parallel to theground when you cut the grass.2.Do not push the trimmer head to the ground. Thiscan cause damage to the product.3.Move the product from side to side when you cutgrass. Use full speed.To sweep the grassThe airflow from the rotating trimmer line can be used toremove cut grass from an area.1.Hold the trimmer head and the trimmer line parallelto the ground and above the ground.2.Apply full throttle.3.Move the trimmer head from side to side and sweepthe grass.WARNING: Clean the trimmer head covereach time you assemble new trimmer line toprevent unbalance and vibrations in thehandles. Also do a check of the other partsof the trimmer head and clean it ifnecessary.16

MaintenanceMaintenance scheduleWARNING: Only do the maintenance andservicing given in this operator's manual. maintenance or servicing that is not given inthis operator's manual, speak to Wemars service MaintenanceDailyWeeklyMonthlyClean the external surface.XMake sure that the throttle trigger lockout and the throttle trigger operates cor-rectly.XDo a check of the stop switch to make sure that it operates correctly.XMake sure that the cutting attachment does not rotate at idle speed.XClean the air filter. Replace the air filter if it is necessary.XExamine the cutting attachment guard for damages and cracks. Replace theguard if it is hit or damaged.XExamine the trimmer head for damages and cracks. Replace the trimmer head ifit is damaged.XMake sure that the screws and nuts are tight.XExamine the engine, the fuel tank and the fuel lines for leaks.XClean the cooling system.XExamine the starter and the starter rope for damages.XExamine the vibration damping elements for damages and cracks.XClean the external parts of the spark plug. Remove it and do a check of the elec-trode gap. Adjust the electrode gap to the correct distance or replace the spark plug. Make sure that the spark plug is fitted with a suppressor .XClean the external parts of the carburetor and the area around it.XDo a check of the bevel gear to make sure that it is filled ¾ with grease. Fill thebevel gear with Wemars special grease if it is necessary.XClean or replace the spark arrestor mesh on the muffler (only applies to mufflerswithout a catalytic converter).XXDo a check of the fuel filter for contamination and the fuel hose for cracks or oth-er defects. Replace parts if it is necessary.XDo a check of all the cables and connections.XIf it is necessary to replace the clutch, clutch springs or clutch drum, speak toWemars service .XReplace the spark plug. Make sure that the spark plug is fitted with a suppres-sor.X17

18To adjust the idle speed1.Make sure that the air filter is clean and the air filtercover is installed.2.Adjust the idle speed with the idle adjustment screw.The idle adjustment screw T is identified with a "T"mark.3.Turn the idle adjustment screw clockwise until thecutting attachment starts to turn.4.Turn the idle adjustment screw counterclockwiseuntil the cutting attachment stops.The idle speed is correct when the engine operatessmoothly in all positions. The idle speed must be belowthe speed when the cutting attachment starts to turn.WARNING: If the cutting attachment doesnot stop when you adjust the idle speed,Speak to Wemars service . Do not use the product until it is correctly adjusted or repaired.
T
To examine the spark plugCAUTION: Always use the recommendedspark plug type. Incorrect spark plug typecan cause damage to the product.•Examine the spark plug if the engine is low onpower, is not easy to start or does not operatecorrectly at idle speed.•To decrease the risk of unwanted material on thespark plug electrodes, obey these instructions:a)Make sure that the idle speed is correctlyadjusted.b)Make sure that the fuel mixture is correct.c)Make sure that the air filter is clean.•If the spark plug is dirty, clean it and make sure thatthe electrode gap is correct.•Replace the spark plug if it is necessary.To do maintenance on the trimmerhead1.Only use the recommended cutting attachment andcutting attachment guard. 2.Make sure that the cutter on the cutting attachmentguard is not damaged, it cuts the cord to the correctlength.3.Install the cord as the illustrations on the last pagesof the manual shows.Air filterRemove dust and dirt from the air filter to keep it clean inorder to prevent:•Carburettor malfunctions.•Starting problems.•Loss of engine power.•Unnecessary wear to engine parts.•Too much fuel consumption.Clean the air filter at an interval of 25 hours, or moreregularly if conditions are unusually dusty.To clean the air filterCAUTION: A air filter that is damaged, verydirty or soaked with fuel must always bereplaced.If you use an air filter for a long time it cannot be fullycleaned. Replace the air filter with a new one at regularintervals.

1925:128mm/9TSpool for grass trimmer line Engine idling speed WS-ST42G42.7cc2255Fuel tank capacity1200Ml

TroubleshootingThe engine does not startCheckPossible causeProcedureStop switch.The stop switch is in the stop position.Set the stop switch to the start position.Starter pawls.The starter pawls cannot move freely.Remove the starter cover and clean aroundthe starter pawls.Let wemars service help you.Fuel tank.Incorrect fuel type.Drain the fuel tank and fill with correct fuel.Spark plug.The spark plug is dirty or wet.Make sure that the spark plug is dry andclean.The spark plug electrode gap is incorrect.Clean the spark plug. Make sure that theelectrode gap is correct. Make sure that thespark plug has a supressor.Refer to technical data for correct electrodegap.The spark plug is loose.Tighten the spark plug.The engine starts but stops againCheckPossible causeProcedureFuel tank.Incorrect fuel type.Empty the fuel tank and fill it with cor-rect fuel.Air filter.The air filter is clogged.Clean the air filter.20