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English
Operator’s Manual
Curved Shaft,
4-Cycle Trimmer
Model
MP426CS
IMPORTANT: Read safety rules and instructions carefully before operating equipment.
PART NO. 769-02175 (01/06)
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TABLE OF CONTENTS Content . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page Rules for Safe Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Know Your Trimmer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Assembly Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
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SPARK ARRESTOR NOTE: For users on U.S. Forest Land and in the states of California, Maine, Oregon and Washington. All U.S. Forest Land and the state of California (Public Resources Codes 4442 and 4443), Oregon and Washington require, by law that certain internal combustion engines operated on forest brush and/or grass-covered areas be equipped with a spark arrestor, maintained in effective working order, or the engine be constructed, equipped and maintained for the prevention of fire. Check with
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• Be aware of risk of injury to the head, hands and feet. • Be sure the cutting attachment is not in contact with anything before starting the unit. • Clear the area to be cut before each use. Remove rocks, broken glass, nails, wire, string and other • Use the unit only in daylight or good artificial light. objects which may be thrown or become entangled in • Avoid accidental starting. Remain in the starting the cutting attachment. Clear the area of children, position whenever pulling the starte
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SECTION 1b: SAFETY & INTERNATIONAL SYMBOLS This operator's manual describes safety and international symbols and pictographs that may appear on this product. Read the operator's manual for complete safety, assembly, operating and maintenance and repair information. SYMBOL MEANING SYMBOL MEANING • THROWN OBJECTS AND • SAFETY ALERT SYMBOL ROTATING CUTTER CAN Indicates danger, warning or caution. CAUSE SEVERE INJURY May be used in conjunction with other WARNING: Do not operate without symbols or
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SECTION 2: KNOW YOUR UNIT Spark Arrestor Spark Plug Applications As a trimmer: Muffler • Cutting grass and light weeds • Decorative trimming around trees, fences, etc. Muffler Guard Starter Rope Grip Fuel Cap Shaft Grip On/Off Stop Control Throttle Control J-Handle Spark Plug Shaft Housing Air Filter Cover Primer Bulb Cutting Attachment Shield Line Cutting Blade Oil Fill Plug / Dipstick Cutting Attachment Engine Feet 6
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SECTION 3: ASSEMBLY INSTRUCTIONS On some units, the J-handle may be pre-installed. Go to Installing the Cutting Attachment Shield step 5 if the J-handle is pre-installed. Use the following instructions if the cutting attachment shield on your unit is not installed. Install and Adjust the J-handle WARNING: To prevent serious personal 1. Place the J-handle between the top and middle injury, never operate the trimmer without clamp pieces. See Figure 1. the cutting attachment shield in place. (4) Sc
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SECTION 4: OIL AND FUEL INFORMATION DANGER: OVERFILLING OIL CRANKCASE 2. Place the unit on a flat level surface. MAY CAUSE SERIOUS PERSONAL INJURY. 3. Remove the oil plug / dipstick from the crankcase. Check and maintain the proper oil level in See Figure 7. the crank case; it is important and cannot be overemphasized. Check the oil before each use and change it as needed. See Changing the Oil. RECOMMENDED OIL TYPE Using the proper type and weight of oil in the crankcase O-Ring is extremely impo
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Unleaded Gasoline SECTION 4: OIL AND FUEL INFORMATION RECOMMENDED FUEL TYPE FUELING THE UNIT WARNING: Gasoline is extremely flammable Old fuel is the primary reason for improper unit and its vapors can explode if ignited. To avoid performance. Be sure to use fresh, clean, unleaded serious personal injury, always stop the engine gasoline. and allow it to cool before filling the fuel tank. NOTE: This is a four cycle engine. In order to avoid Do not smoke while filling the tank. Keep damage to the
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SECTION 5: STARTING/STOPPING INSTRUCTIONS Stop/Off (O) WARNING: Operate this unit only in a well- Start/On ( I ) ventilated outdoor area. Carbon monoxide exhaust fumes can be lethal in a confined area. WARNING: Avoid accidental starting. Make sure you are in the starting position when pulling the starter rope (Fig. 9). To avoid serious injury, the operator and unit must be in a stable position while starting. Throttle To avoid serious personal injury, ensure any Control Add-On being used is inst
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SECTION 6: OPERATING INSTRUCTIONS NOTE: Do not rest the bump knob on the ground while Holding the Trimmer the unit is running. WARNING: Always wear eye, hearing, foot CAUTION: Do not remove or alter the line and body protection to reduce the risk of cutting blade assembly. Excessive line injury when operating this unit. length may make the unit overheat. Before operating the unit, stand in the operating Some line breakage will occur from: position. See Figure 14. Check for the following: • Entan
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SECTION 7: MAINTENANCE AND REPAIR INSTRUCTIONS Maintenance Schedule NOTE: Maintenance, replacement, or repair of the emission control devices and system may be performed by Perform these required maintenance procedures at the any non-road engine repair establishment, individual frequency stated in the table. These procedures should or authorized service dealer. also be a part of any seasonal tune-up. WARNING: To prevent serious injury, never NOTE: Some maintenance procedures may require perform
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SECTION 7: MAINTENANCE AND REPAIR INSTRUCTIONS 3. Pull old line out of the line loading and line locking 7. Repeat procedures 4-6 with the second piece of line. holes (Fig. 16 and 17). 8. Hold the outer spool. Wind the inner reel 4. Insert a piece of trimming line straight into one of the counterclockwise until approximately four (4) inches two eyelets in the outer spool. Push it up through the (102 mm) of line remain (Fig. 19). line loading hole in the inner reel (Fig. 16). Do not NOTE: Do not
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SECTION 7: MAINTENANCE AND REPAIR INSTRUCTIONS 2. Pull the old inner reel with existing line from the outer 3. Remove any existing line from the inner reel before spool. cleaning. Remove any debris or grass from the knob, spring, inner reel and foam seal. Wash the inner reel 3. Insert the ends of the prewound inner reel line into with warm soapy water (Fig. 24). the outer spool eyelets (Fig. 22). Push the new inner reel, arrow side up, into the outer spool. Inner Reel Fig. 24 4. Clean the shaft
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SECTION 7: MAINTENANCE AND REPAIR INSTRUCTIONS CHECKING THE OIL LEVEL CHANGING THE OIL The importance of checking and maintaining the proper For a new engine, change the oil after the first 10 hours of CAUTION: To prevent extensive engine operation. Change the oil while the engine is still warm. The wear and damage to the unit, always oil will flow freely and carry away more impurities. maintain the proper oil level in the crankcase. Never operate the unit with the CAUTION: Wear gloves to preven
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SECTION 7: MAINTENANCE AND REPAIR INSTRUCTIONS AIR FILTER MAINTENANCE Cleaning the Air Filter WARNING: To avoid serious personal injury, always turn your trimmer off and allow it to cool before you clean or service it. Clean and re-oil the air filter every 10 hours of operation. It is an important item to maintain. Failure to maintain the air filter will VOID the warranty. Figure 32 Figure 33 1. Open the air filter cover. Push the tab on the right side of the cover inward. Then pull the air filt
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SECTION 7: MAINTENANCE AND REPAIR INSTRUCTIONS Clean Air Filter ROCKER ARM CLEARANCE The condition of the air filter is important to the operation This requires disassembly of the engine. If you feel of the unit. A dirty air filter will restrict air flow and change unsure or unqualified to perform this, take the unit to an the air/fuel mixture. This is often mistaken for an out of authorized service center. adjustment carburetor. Check the condition of the air filter before adjusting the idle sp
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SECTION 7: MAINTENANCE AND REPAIR INSTRUCTIONS 3. Remove the screw behind the engine cover. See Adjusting Nuts Figure 38. Rocker Arms INTAKE Screw EXHAUST Feeler Gauge Figure 38 4. Disconnect the spark plug wire. Figure 40 5. Clean dirt from around the spark plug. Remove the spark plug from the cylinder head by turning a 5/8 in. socket counterclockwise. Adjusting Nut 6. Remove the engine cover. See Figure 37. Rocker Arm 7. Clean dirt from around the rocker arm cover. Remove the screw holding the
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SECTION 7: MAINTENANCE AND REPAIR INSTRUCTIONS Replacing the Spark Plug SPARK ARRESTOR MAINTENANCE Use a Champion RDZ19H spark plug (or equivalent). The 1. Remove the muffler cover. See Rocker Arm Clearance. correct air gap is 0.025 inch (0.655 mm). Remove the 2. With a flat blade screwdriver or Torx T-20 bit, plug after every 25 hours of operation and check its remove the screw attaching the spark arrestor cover condition. to the muffler. See Figure 43. 1. Stop the engine and allow it to cool.
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SECTION 7: MAINTENANCE AND REPAIR INSTRUCTIONS 3. Allow the engine to cool. Remove the spark plug and Cleaning put 1 oz. (30 ml) of any high quality motor oil or 2- WARNING: To avoid serious personal injury, cycle oil into the cylinder. Pull the starter rope slowly always turn your trimmer off and allow it to to distribute the oil. Reinstall the spark plug. cool before you clean or service it. NOTE: Remove the spark plug and drain all of the oil Use a small brush to clean off the outside of the
