Homelite UT74121A manual Basic OPERATING/CUTTING Procedures, Work Area Precautions, See Figures 24

Page 17

OPERATION

BASIC OPERATING/CUTTING PROCEDURES

Practise cutting a few small logs, using the following technique to get the “feel” of using the saw before you begin a major sawing operation.

1.Take the proper stance in front of the wood with the saw idling.

2.Accelerate the engine to full throttle just before entering the cut by squeezing the throttle trigger.

3.Begin cutting with the saw against the log.

4.Keep the engine at full throttle the entire time you are cutting.

5.Allow the chain to cut for you; exert only light downward pressure. Forcing the cut could result in damage to the bar, chain or engine.

6.Release the throttle trigger as soon as the cut is completed, allowing the engine to idle. Running the saw at full throttle without a cutting load may result in unnecessary wear to the chain, bar and engine.

7.Do not put pressure on the saw at the end of the cut.

WORK AREA PRECAUTIONS

Cut only wood or materials made from wood; no sheet metal, no plastics, no masonry, no non-wood building materials.

Never allow children to operate your saw. Allow no person to use this chainsaw who has not read this operator’s manual or received adequate instructions for the safe and proper use of this chainsaw.

Keep everyone – helpers, bystanders, children and animals— a SAFE DISTANCE from the cutting area. During felling operations, the safe distance should be a least twice the height of the largest trees in the felling area. During bucking operations, keep a minimum distance of 4.5 m (15 ft) between workers.

Fig. 23

Always cut with both feet on solid ground to prevent being pulled off balance.

Do not cut above chest height, as a saw held higher is difficult to control against kick-back forces.

Do not fell trees near electrical wires or buildings. Leave this operation for professionals.

Cut only when visibility and light are adequate to see clearly.

ADJUSTING THE CARBURETTOR

See Figures 24 and 25.

Before adjusting the carburettor, clean the air filter and the starter cover vents. Allow the engine to warm up before carburettor adjustment. Refer to “Maintenance” later in this manual.

AIR FILTER

Fig. 24

STARTER COVER

 

VENTS

Fig. 25

The carburettor is factory set and should not require adjusting. The carburettor will permit only limited adjustment of the “L” (Low Jet) and “H” (High Jet) needles. Any adjustment should be done by a Homelite service dealer.

Under no circumstances should the “L” (Low Jet) and “H” (High Jet) needles be forced outside the range of adjustment.

CAUTION:

Serious damage may occur to the engine if improper adjustments are made to the “L” and “H” needles.

Do not force the “L” and “H” needles outside the adjustment range!

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Contents Save this Manual for Future Reference OPERATOR’S ManualIntroduction Table of ContentsRead ALL Instructions General Safety RulesDo not Operate a Chainsaw That is Damaged General Precautions Specific Safety RulesSafety Apparel Basic Precautions in the CUTTING/ Work AreaPush and Pull Maintenance PrecautionsKICK-BACK Pull PushSymbol Name Explanation SymbolsRUN StopSpecifications Features Operation Understanding Your Chainsaw Safety DevicesLOW KICK-BACK SAW Chain Guide BarsChain Brake KICK-BACK PrecautionsRUN Position KICK-BACK Brake Position RotationalHandling the Fuel Safely Fuel and RefuellingMixing the Fuel Filling the TankChain OIL System Brake Position Ignition Switch RUN Primer BulbStarting the Engine See Figures 10 toStarting a Cold Engine Starting a Warm Engine Stopping the EngineProper Grip on Handles Preparing for CuttingChain Line Proper GripWork Area Precautions Basic OPERATING/CUTTING ProceduresAdjusting the Carburettor See Figures 24Brake Position RUN Position Adjusting Idling SpeedOperating the Chain Brake Retreat Path Felling Trees Hazardous ConditionsRetreat Proper Procedure for Tree FellingPlanned Line of Fall Notch Approx /3 Diameter Trunk Back CUT HingeHinge Back CUT WedgeBucking Removing Buttress RootsBucking with a Wedge Vertical CUT Loose Section Horizontal KICK-BACK WedgeOverbucking Bucking Logs Under StressUnderbucking LOG Supported AT ONE END Finishing CUTCutting Spring Poles Limbing and PruningLoad Second CUT Finishing CUT Spring PoleAssembling the BAR and Chain MaintenanceCutters Chain Tensioning Screw Chain Maintenance Adjusting the Chain TensionSee Figures 52, 53 Flats on Drive LinksSharpening the Cutters Check for Wear or Damage LEFT-HAND Cutters RIGHT-HAND Side Plate Angle Maintaining Depth Gauge ClearanceTOP Plate Filing Angle Maintaining the Guide BAR Restore Original Shape by Rounding FrontMaintaining the SAFE-T-TIP Nose Guard Lubricating HoleMounting the SAFE-T-TIP Nose Guard Cleaning the AIR FilterTighten 3/4 Turn See Figures 71, 72Cleaning the Engine Cleaning the Starter UnitChecking the Fuel Filter Replacing the Sparking PlugChain Catcher Brake Band Clean the Chain Brake Cleaning the Spark Arresting SI- LencerChain Brake Storing the Chainsaw 1 Month or LongerBAR and Chain Combinations TroubleshootingProblem Possible Cause Solution But chain is not rotating Tions. See FigureSafety Directive WarrantyGuarantee Statement Rtsa / Rtuk / RTG 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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