Homelite UT74121A Adjusting Idling Speed, Operating the Chain Brake, Brake Position RUN Position

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OPERATION

ADJUSTING IDLING SPEED

If the engine starts, runs, and accelerates but will not idle, turn the idling speed screw “T” clockwise to increase idling speed.

If the chain turns at idle, turn the idling speed screw “T” anticlockwise to reduce the idling RPM and stop the chain movement. If the saw chain still moves at idling speed, contact a Homelite service dealer for adjustment and discontinue use until the repair is made.

WARNING:

THE SAW CHAIN SHOULD NEVER TURN AT IDLE. Turn the idling speed screw “T” anticlockwise to reduce the idling RPM and stop the chain, or contact a Homelite service dealer for adjustment and discontinue use until the repair is made.

Serious personal injury may result from the saw chain turning at idle.

Fig. 26

WARNING:

Weather conditions and altitude may affect carburation.

Do not allow bystanders close to the chainsaw while adjusting the carburettor.

OPERATING THE CHAIN BRAKE

Refer to “Safety” earlier in this manual for additional information.

Check the operating condition of the chain brake before each use.

1.Start the engine and grasp the front and rear handles securely with both hands.

2.Pull the throttle trigger to bring the chainsaw up to full speed. Using the back of your left hand, engage the chain brake by pushing the chain brake lever/hand guard towards the bar while the chain is rotating rapidly.

See Figure 27.

NOTE: The chain brake should engage and stop the chain immediately. If not, stop the saw by placing the ignition switch in the “O” stop position. Take the saw to a Homelite service dealer for repair and discontinue use until the repair is made.

3.Reset the chain brake back into the RUN position by grasping the right-hand side (from operator’s position) of the chain brake lever/hand guard and pull towards the front handle until you hear a click. See Figure 28.

BRAKE POSITION

Fig. 27

RUN POSITION

Fig. 28

WARNING:

If the chain brake does not stop the chain immediately, take the saw to a Homelite service dealer for repair before use.

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Contents OPERATOR’S Manual Save this Manual for Future ReferenceTable of Contents IntroductionGeneral Safety Rules Read ALL InstructionsDo not Operate a Chainsaw That is Damaged Safety Apparel Specific Safety RulesGeneral Precautions Basic Precautions in the CUTTING/ Work AreaKICK-BACK Maintenance PrecautionsPush and Pull Pull PushRUN SymbolsSymbol Name Explanation StopSpecifications Features LOW KICK-BACK SAW Chain Understanding Your Chainsaw Safety DevicesOperation Guide BarsRUN Position KICK-BACK PrecautionsChain Brake KICK-BACK Brake Position RotationalMixing the Fuel Fuel and RefuellingHandling the Fuel Safely Filling the TankStarting the Engine Brake Position Ignition Switch RUN Primer BulbChain OIL System See Figures 10 toStarting a Cold Engine Stopping the Engine Starting a Warm EngineChain Line Preparing for CuttingProper Grip on Handles Proper GripAdjusting the Carburettor Basic OPERATING/CUTTING ProceduresWork Area Precautions See Figures 24Adjusting Idling Speed Operating the Chain BrakeBrake Position RUN Position Felling Trees Hazardous Conditions Retreat PathProper Procedure for Tree Felling Planned Line of FallRetreat Hinge Back CUT HingeNotch Approx /3 Diameter Trunk Back CUT WedgeBucking with a Wedge Removing Buttress RootsBucking Vertical CUT Loose Section Horizontal KICK-BACK WedgeUnderbucking Bucking Logs Under StressOverbucking LOG Supported AT ONE END Finishing CUTLoad Second CUT Limbing and PruningCutting Spring Poles Finishing CUT Spring PoleMaintenance Assembling the BAR and ChainCutters Chain Tensioning Screw See Figures 52, 53 Adjusting the Chain TensionChain Maintenance Flats on Drive LinksSharpening the Cutters Check for Wear or Damage LEFT-HAND Cutters RIGHT-HAND Maintaining Depth Gauge Clearance TOP Plate Filing AngleSide Plate Angle Maintaining the SAFE-T-TIP Nose Guard Restore Original Shape by Rounding FrontMaintaining the Guide BAR Lubricating HoleTighten 3/4 Turn Cleaning the AIR FilterMounting the SAFE-T-TIP Nose Guard See Figures 71, 72Checking the Fuel Filter Cleaning the Starter UnitCleaning the Engine Replacing the Sparking PlugChain Brake Cleaning the Spark Arresting SI- LencerChain Catcher Brake Band Clean the Chain Brake Storing the Chainsaw 1 Month or LongerTroubleshooting Problem Possible Cause SolutionBAR and Chain Combinations Tions. See Figure But chain is not rotatingGuarantee Statement Rtsa / Rtuk / RTG WarrantySafety Directive EC Declaration of ConformityPage Ryobi Technologies GmbH

UT74121A specifications

The Homelite UT74121A is a versatile gas-powered string trimmer designed for homeowners and landscapers seeking an efficient tool for maintaining their lawns and gardens. Known for its reliability, the UT74121A combines performance with user-friendly features that make lawn care tasks less daunting.

One of the standout features of the UT74121A is its powerful 26cc 2-cycle engine. This engine provides ample power for cutting through dense grass and weeds, ensuring that tasks are completed quickly and efficiently. The lightweight design of the trimmer, coupled with its ergonomic handle, allows users to maneuver easily, making it ideal for extended use without causing fatigue.

The Homelite UT74121A is equipped with an easy-to-load bump feed spool for quick line replacement. Users can effortlessly advance the cutting line by tapping the trimmer's head on the ground, making it convenient to maintain the desired cutting length without interrupting work. The trimmer uses .095-inch diameter line, which provides durability and resilience against tough conditions.

In terms of design, the UT74121A features a straight shaft that offers increased reach and allows users to access hard-to-reach areas with ease. This design is particularly helpful for trimming along fences, in flower beds, and under low-hanging branches. The adjustable handle height further enhances user comfort, allowing for customization based on individual preferences.

Safety is a primary concern for any outdoor equipment, and the UT74121A incorporates several features to enhance user safety. It comes with a protective shield that prevents debris from being thrown during operation, and the easy-starting system reduces pull effort, making it accessible for users of all skill levels.

The trimmer also adheres to stringent emissions standards, making it an environmentally-friendly option in today's market. With proper maintenance, the UT74121A ensures longevity and sustained performance, making it a valuable addition to any landscaping toolkit.

Overall, the Homelite UT74121A is a powerful and efficient solution for those seeking a reliable string trimmer. Its combination of a robust engine, user-centric design, and safety features makes it suitable for various lawn care tasks, ensuring gardens and lawns remain well-groomed year-round.
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