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The engine exhaust from this product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. Keep this owner’s manual handy, so you can refer to it at any time. This owner’s manual is considered a permanent part of the trimmer/brush cutter and should remain with the trimmer/brush cutter if resold. The information and specifications included in this publication were in effect at the time of approval for prin
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INTRODUCTION Congratulations on your selection of a Honda trimmer/brush cutter. We are certain you will be pleased with your purchase of one of the finest trimmers/brush cutters on the market. We want to help you get the best results from your new trimmer/brush cutter and to operate it safely. This manual contains the information on how to do that; please read it carefully. As you read this manual, you will find information preceded by a symbol. That information is intended to he
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INTRODUCTION A FEW WORDS ABOUT SAFETY Your safety and the safety of others are very important. And using this trimmer/brush cutter safely is an important responsibility. To help you make informed decisions about safety, we have provided operating procedures and other information on labels and in this manual. This information alerts you to potential hazards that could hurt you or others. Of course, it is not practical or possible to warn you about all the hazards associated wit
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CONTENTS TRIMMER SAFETY ............................................ 4 OPERATION(continued) Trimming and Edging ........................................................... 23 IMPORTANT SAFETY INFORMATION .......................... 4 Brush Clearing ...................................................................... 23 ATTACHMENTS & MODIFICATIONS .............................. 5 Operation on Slopes ............................................................. 23 Attachments .....
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TRIMMER SAFETY IMPORTANT SAFETY INFORMATION Honda UMK422 and UMK431 trimmerdbrush Turn the Engine Off When Not Trimming cutters are designed to cut grass, weeds, brush, 0 If you stop trimming or cutting for any reason, and/or wood if equipped with an appropriate even to clean off the cutting attachment, cutting attachment. Other uses can result in injury always shut off the engine. to the operator or damage to the trimmer and other property. Keep
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TRIMMER SAFETY ATTACHMENTS & MODIFICATIONS IMPORTANT MESSAGE TO EMPLOYERS Modifying your trimmer/brush cutter, or installing As an employer, you have special responsibilities non-Honda attachments, can make your trimmer to the people who work for you. unsafe. Before you make any modifications or install any attachments, be sure to read the Before you ask anyone to operate this trimmer/ following information. brush cutter, you need to determine wheth
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TRIMMER SAFETY SAFETY LABEL LOCATIONS The labels shown here contain important safety information. Please read them carefully. These labels are considered permanent parts of your trimmer/brush cutter. If a label comes off or becomes hard to read, contact an authorized Honda servicing dealer for a replacement. 1 I II A WARNING I I I OWNERS MANUAL. I Failure to do so can result in serious injury I to the oDerator and I q I bystanders. I I I I A WARNING I I OBJECTS THRO
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RECOMMENDED CUTTING ATTACHMENTS CUTTING-LINE HEADS AND SHIELD CUTTING-LINE HEAD NYLON MONOFILAMENT LINE A cutting-line head containing nylon monofilament \ I line, and a debris shield with cutoff knife is standard equipment. The shield’s cutoff knife automatically removes any excess line that is released from the cutting head. Honda UMK431 UNBA trimmers are supplied with two different debris shields. Use the debris shield with the cutoff knife when the cutting-line head is i
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RECOMMENDED CUTTING ATTACHMENTS CUlTlNG LINE DEBRIS SHIELD A variety of blades are available from your Honda trimmer servicing dealer. Always use a debris SHIELD FOR GRASSNEED BLADE, shield designed for use with a blade when WEED/BRUSH BLADE attaching a blade to your trimmer. This type of debris shield does not have a cutoff knife. p DEBRIS SHIELD FOR BRUSHNOOD BLADE I CUTOFF KNIFE Honda UMK431 UNBA trimmers are supplied with BLADE BLADE a blade cover surrounding t
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RECOMMENDED CUTTING ATTACHMENTS Brush/Wood Blade Cover Installation and BLADE Removal DEBRIS SHIELD \ \ ENDA 1. Place the blade cover on the blade halfway, starting with end A. To prevent the posts on end A from interfering with the debris shield, remove end A from the blade and place it beside the blade as shown. 2. Turn the blade slowly until end A is clear of the debris shield. END 6' 3. Replace end A on the blade. 4. With the blade cover
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CONTROLS & EQUIPMENT COMPONENT & CONTROL LOCATIONS CHOKE LEVER SPARK PLUG CAP fi FUEL RETURN TUBE [Jear) \ FUEL SUPPLY TUBE FUEL TANK (black) CUTTING-LINE HEAD I GEAR CASE STARTER GRIP LOOP HANDLE ARNESS HANGER THROlTLE SET BUlTON DEBRIS SHIELD WITH CUTOFF A DRIVE SHAFT HOUSING IGNITION SWITCH UMK431 UNBA GEAR CASE (supplied with two BLADE, cutting attachments and debris shields) THROlTLE SET BUlTON DEBRIS SHIELD FOR BRUSHMOOD BLADE -HARNESS HANGE
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I CONTROLS & EQUIPMENT CONTROLS CHOKE LEVER Choke Lever The choke lever opens and closes the choke valve. The CLOSED.position enriches the fuel mixture for starting a cold engine. The OPEN position provides the correct fuel mixture for operation after starting, and for restarting a warm engine. Ignition Switch The ignition switch controls the ignition system. IGNITION SWITCH BUTTON The ignition switch button must be in the ON ( I ) OFF (0) position for the engine to star
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CONTROLS & EQUIPMENT Throttle Set Button THROlTLE SET BUlTON The throttle set button is used to hold the throttle trigger at the fast idle position for starting. Do not allow the cutting line or blade to contact any obstruction when starting the engine with the OPERATOR throttle button engaged PRESENCE LEVER To engage the throttle set button, press the operator presence lever by gripping the control handle, pull the throttle trigger, then press and hold the
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CONTROLS & EQUIPMENT FULL SHOULDER HARNESS EQUIPMENT n Honda UMK422 and UMK431 trimmerdbrush cutters are supplied with a shoulder harness and safety glasses. Refer to page 14 for a description of other equipment and protective clothing you will need. Shoulder Harness A full shoulder harness must be worn by the QUICK-RELEASE LATCH operator of these Honda trimmers/brush cutters when equipped with a blade and debris shield. If SINGLE-STRAP SHOULDER HA
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ARE YOU READY TO OPERATE THE TRIMMER? Your safety is your responsibility. A little time Hearing Protection spent in preparation will significantly reduce your Hearing protectors will help to protect your ears risk of injury. from noise. Earmuff-style hearing protectors can also protect your ears from thrown objects. Knowledge Read and understand this manual. Know what the Hand and Body Protection controls do and how to operate them. Wear gloves, a long-sleeved shirt, and l
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BEFORE OPERATION IS YOUR TRIMMER READY TO GO? For your safety, and to maximize the service life Cutting Attachment Inspection of your equipment, it is very important to take a Look for signs of damage to the cutting few moments before you operate the trimmer to attachment (see pages 33 and 39). Replace check its condition. Be sure to take care of any any cutting attachment and parts that are worn problem you find, or have your servicing dealer out, bent, cracked,
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BEFORE OPERATION ARE YOUR SHOULDER HARNESS AND TRIMMER CORRECTLY ADJUSTED? Adjusting the Harness Balancing the Trimmer on the Shoulder Harness Adjust the harness so the quick-release latch is at your right hip, as shown. Hang the trimmer on the harness hook, and see how it balances. Adjust the shoulder harness, the hanger clamp on the trimmer shaft, and the loop handle or U-type handlebar, so the handle or handlebars are in a comfortable operating position, an
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OPERATION SAFE OPERATING PRECAUTIONS Before operating the trimmer for the first time, please review the IMPORTANT SAFETY INFORMATlON on page 4 and the chapter titled BEFORE OPERATION. Even if you have operated other trimmers, take time to become familiar with the operation of this trimmer’s controls and handling. For your safety, avoid starting or operating the engine in an enclosed area, such as a garage. Your engine’s exhaust contains poisonous carbon monoxide gas which
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OPERATION I 5. Set the trimmer on the ground, resting on the debris shield and the fuel tank guard. Do not allow the cutting line or blade to contact any obstruction. Always rest the trimmer on the ground for starting, rather than holding it in the operating position. That prevents the end of the trimmer from swinging into something as you start the engine. 6. With your left hand, hold the drive shaft housing just ahead of the engine. With your right hand, pull the starter grip lig
