Remington RM2520 Gas String Trimmer Manual

Remington RM2520 Gas String Trimmer

APPLICATIONS

As a trimmer:

• Cutting grass and light weeds.
• Edging
• Decorative trimming around trees, fences, etc.

NO ASSEMBLY TOOLS REQUIRED

SPECIFICATIONS

• Engine Type: Air-cooled, 2-Cycle
• Stroke:1.02 in. (2.6crn)
• Displacement:25 cc
• Operating RPM:6,300+ rpm
• Idle speed RPM:3,200 – 4,400 rpm
• Spark Plug Gap: 0.025 in. (0.635 mm
• Lubrication: Fuel,’ Oil Mixture
• Fuel/oil ratio:401
• Fuel Tank Capacity: 101. oz. (296 ml)
• Total Approximate unit Weight (without Fuel): 10-11 lbs. (4.5-5@)
• Cutting Mechanism: Bump HeadTM
• Line Spool Diameter: 3 in. (76.2 mm)
• Trimming Line Diameter:0.095 in. (2.41 mm)
• Cutting Path Diameter:17 in. (43.18cm)

INSTALLING THE CUTTING HEAD SHIELD

Use the following instructions if the cutting head shield is not installed. Use only the instructions for the type of shaft and shield equipped with this unit.

1. Remove the wing nut and washer from the cutting head shield.
2. Insert the short tab (the one without a hole) on the mount bracket into the slot on the cutting head shield (Fig. 1).
3. Rotate the cutting head shield counterclockwise to align the hole on the cutting head shield with the hole on the mount bracket (Fig. 1).
4. Insert the square bolt into the hole underneath the cutting head shield (Fig. 2). Push the square bolt through the cutting head shield and mount the bracket.
5. Put the washer onto the square bolt (Fig. 2).
6. Screw the wing nut onto the square bolt until the cutting head shield is firmly in place (Fig. 2).
   

    

INSTALLING AND ADJUSTING THE HANDLE

Installing the Handle

1. Push the D-handle down onto the shaft housing (Fig. 2). The hex bolt hole in the handle should be on the side.
2. Insert me bolt into the hex hole in the handle and push through. Place the washer on the bolt, then screw the wing nut onto the bolt. Do not tighten until the handle adjustment is made.
3. While holding the unit in the operating section (fig. 6), move the D-handle to the location that provides the test grip.
4. Tighten the wing nut until the D-handle is secure.

Adjusting the Handle

The handle requires adjustment:

1. Loosen the wing nut (Fig. 3).
2. While holding the unit in the operating position (Fig. 10), move the handle to the location that provides the best grip. Place it at least 6 inches (15.24 cm) from the end of the shatt grip (Fig. 3).
3. Tighten the wing nut until the handle is secure.

OPERATING THE EZ-LINKT SYSTEM

Installing the Attachment

1. Turn the knob counterclockwise to loosen (Fig. 4).
2. While firmly holding the attachment, push it straight into the coupler until the release button snaps firmly into the primary nole (Fig. 6).
   NOTE: Aligning the release button with the guide recess will help installation (Fig. 5).
3. Turn the knob clockwise to tighten (Fig. 4).

Removing the Attachment

1. Turn the knob counterclockwise to loosen (Fig. 4).
2. Press and hold the release button (Fig. 5).
3. While firmly holding the upper shatt housing, pull the attachment straight out of the coupler (Fig. 6).

The EZ-LinkTM system

The EZ-LinkTM system enables the use of these optional attachments:

• Edger
• Cultivator
• Turbo Blower
• Brushcutter
• Pole Saw
• Hedge Trimmer
• Straight-shaft trimmer
• Curved-shaft trimmer

OIL AND FUEL INFORMATION

OIL AND FUEL MIXING INSTRUCTIONS

The use of Old and/or improperly mixed fuel is the main reason for the unit not running properly. Be sure to use fresh, clean unleaded fuel. Follow the instructions carefully for the proper fuel/oil mixture.

DEFINITION OF BLENDED FUELS

Today’s fuels often blend gasoline and oxygenate such as ethanol, methanol, or MTBE (ether). Alcohol blended fuel absorbs water. As little as 1 percent. water in the fuel can make fuel and oil separate. It forms acids when stored. When using alcohol-blended fuel, use fresh fuel (less than 30 days Old).

USING BLENDED FUELS

If choosing to use a blended fuel, or its use is unavoidable, follow recommended precautions:

• Always use the fresh fuel mix explained in the operator’s manual
• Use the fuel additive STA-BIL@ or an equivalent
• Always agitate the fuel mix before fueling the unit
• Drain the tank and run the engine dry before storing the unit

USING FUEL ADDITIVES

The bottle of 2-cycle oil provided with this unit contains a fuel additive to help inhibit corrosion and minimize gum deposits. Always use the brand of 2-cycle oil that comes with this unit. If this Is unavailable, use a 2-cycle oil designed for air-cooled engines and mix it with a fuel additive, such as STA-BIL Fuel Stabilizer or an equivalent. Add 0.8 oz. (23 ml) of fuel additive per gallon of fuel, according to the instructions on the container. NEVER add fuel additives directly to the unit’s fuel tank.

Mixing the Fuel

Thoroughly mix the proper ratio of unleaded gasoline with 2-cycle engine oil. Do not mix them directly in the unit’s fuel tank. Use a separate tuel can. Use a 40:1 gasoline/oil ratio. See the table below for specific gasoline and oil mixing ratios.

FUELING THE UNIT

1. Turn the unit on its side, with the fuel cap facing up.
2. Remove the fuel cap.
3. Place the gas container’s spout into the fill hole on the fuel tank and fill the tank.
4. Wipe up any gasoline that may have spilled.
5. Reinstall the fuel cap.
6. Move the unit at least 30 ft. (9.1 m) from the fuel source and site before starting the engine.

STARTING AND STOPPING

STARTING INSTRUCTIONS

1. Mix gasoline with oil. Reterto 011 and Fuel Mixing Instructions.
2. Fill the fuel tank. Refer to Fueling the Unit.
   NOTE: There is no need to turn the unit on. The On/Off switch is in the ON (l) position at all times (Fig. 7).
3. Slowly press and release the primer bulb 10 times (Fig. 8). If the tuel cannot be seen in the primer bulb, press and release the primer bulb until the fuel is visible.
4. Move the choke lever to Position 1 (Fig. 8).
5. Crouch in the starting position (Fig. g).
6. Squeeze the throttle control (Fig. 7) and pull the starter rope with a controlled and steady motion 5 times (Fig. g).
7. Continue to squeeze the throttle control. Move the choke lever to position 2 (Fig. 8).
8. Continue to squeeze the throttle control. Pull the starter rope with a controlled and steady motion 3 to 5 times to start the engine.
9. Continue to squeeze the throttle control. Allow the engine to warm up for 30 to 60 seconds.
10. Continue to squeeze the throttle control. Move the choke lever to Position 3 (Fig. 8) and continue warming the engine for an additional 60 seconds. The unit may be used during this time.

STOPPING INSTRUCTIONS

1. Release the throttle control and allow the engine to cool down by idling.
2. Press and hold the On/Off Control switch in the OFF (O) position until the unit comes to a complete stop (Fig. 7).

OPERATING

HOLDING THE TRIMMER

• Stand in the operating position (Fig. 10).
• Hold the Shatt grip with the right hand. Keep the right arm slightly bent.
• Hold the handle with the left hand. Keep the left arm straight.
• Hold the unit at waist level.
• Keep the cutting head parallel to the ground so that it easily contacts the grass without the need to bending over.

ADJUSTING TRIMMING LINE LENGTH

This unit is equipped witn a Bump Head. Trimming line can be released trom the cutting head without stopping the engine. To release more line, lightly tap the bump knob on the ground (Fig. 11) while operating the unit at high speed.For best results, tap the bump knob on bare ground or nard soil. Attempting to release line in tall grass may stall the engine.

TIPS FOR BEST TRIMMING RESULTS

• Keep the cutting head parallel to the ground.
• Cut from left to right whenever possible. This improves the unit’s cutting efficiency and throws clippings away from the operator.
• Do not trim wet grass or weeds.
  NOTE: Some line breakage will occur from:
  • Entanglement with foreign matter
  • Normal line fatigue
  • Attempting to cut thick vegetation
  • Forcing the line into objects such as walls or fence posts

DECORATIVE TRIMMING

When trimming around trees, posts, fences, etc., rotate the whole unit so that the cutting head is at a 300 angle to the ground (Fig. 12).

MAINTENANCE 

MAINTENANCE SCHEDULE

Perform these required maintenance procedures at the frequency stated in the table. These procedures should also be a part of any seasonal tune-up.

REPLACING THE TRIMMING LINE

Part 1 – Removing the Inner Reel

1. Hold the outer spool with one hand and unscrew the bump knob counterclockwise (Fig. 13).
2. Inspect the bolt inside the bump knob to make sure it moves freely. Replace the bump knob if it is damaged.
3. Remove the inner reel from the outer spool (Fig. 14).
4. Remove the spring from the inner reel (Fig. 14).
5. Use a clean cloth to clean the inner reel, spring, shaft, and inner surface Of the outer spool.
6. Check the indexing teeth and holding slots for wear (Fig. 15). If necessary, remove burrs or replace the inner reel and outer spool.

Part 2 – Winding New Trimming Line onto the Inner Reel

• If using a single line, refer to Winding Single Line.
• If using a split line, refer to the Winding Split Line.
• If using a prewound inner reel, proceed to Part 3 – Installing the Inner Reel.

Winding Single Line

1. Cut two 8-foot (2.4 m) lengths of new single trimming line.
2. Insert the end of one line into the top hole in the inner reel (Fig. 16A). Wind the line tightly in the direction shown on the bottom of the inner reel until about 6 inches (150 mm) of the line remains. Keep the line above the split wall. Insert the 6-inch section into the nearest .095 holding slot (Fig. 16B).
3. Insert the end of the other line into the bottom hole in the inner reel (Fig. 17A). Wind the line tightly in the direction shown on the bottom of the inner reel until about 3 to g inches (75 to 225 mm) of the line remains. Keep the line below the split wall. Insert the 3 to 9-inch section into the opposite .095 holding slot (Fig. 17B).

Winding Split Line

1. Cut one 6-foot (1.8 m) length of new split line trimming line. Split each end about 6 inches (150 mm).
2. Using one split end, insert one line into the top hole and the other line into the bottom hole in the inner reel (Fig. 18A).
3. Wind the line tightly in the direction shown on the bottom of the inner reel. The split wall will automatically divide the line. Wind the line until it is completely divided and about 6 inches (150 mm) of line remains.

Part 3 – Installing the Inner Reel

1. Pass the two line ends through the eyelets in the outer spool. Place the spring inside the inner reel. Insert the inner reel into the outer spool. Push the inner reel and outer spool together (Fig. 19).
2. While holding the inner reel and outer spool together, firmly pull the two line ends to release them from the holding slots.
3. While holding the inner reel and outer spool together, screw the bump knob clockwise. Tighten the bump knob securely.

MAINTENANCE THE AIR FILTER

Failure to maintain the air filter can result in poor performance or can cause permanent damage to the engine. Engine failure due to improper air filter maintenance is not covered by the product warranty.

Cleaning the Air Filter

1. Open the air filter cover by pressing the lock tab in and pulling it out on the air filter cover (Fig. 20).
2. Remove the air filter (Fig. 20).
3. Wash the filter in detergent and water. Rinse the filter thoroughly and allow it to dry.
4. Apply enough clean SAE 30 motor oil to lightly coat the filter.
5. Squeeze the filter to spread and remove excess oil.
6. Replace the air filter with the air filter cover (Fig. 20).
7. Close the air filter cover by swinging it to the left and then pressing it down until the lock tab snaps into place (Fig. 20).

ADJUST IDLE SPEED

If, after checking the fuel mixture and cleaning the air filter, the engine still will not idle, adjust the idle speed screw as follows:

1. Start the engine and run for one minute to warm up. Refer to Starting and Stopping Instructions.
2. Release the throttle trigger and let the engine idle. If the engine stops, insert a small Phillips screwdriver into the idle adjustment screw (Fig. 21). Turn the idle speed screw clockwise 1/8 of a turn at a time (as needed) until the engine dies smoothly.
3. If the engine appears to be idling too fast, turn the idle speed screw counterclockwise 1/8 of a turn at a time (as needed), to reduce idle speed. (fig.21).

Checking the fuel mixture, cleaning the air filter, and adjusting the idle speed should solve most engine problems. If not all of the following are true:

• the engine will not idle
• the engine hesitates or stalls on acceleration
• there is a loss of engine power Have the carburetor adjusted by an authorized service dealer.

MAINTAINING THE SPARK PLUG

1. Stop the engine and allow it to cool. Grasp the spark plug boot firmly and pull it from the spark plug.
2. Clean around the spark plug. Remove the spark plug from the cylinder head with a 6/8-inch socket, turning counterclockwise.
3. Inspect the spark plug. If the spark plug is cracked, fouled, or dirty, replace it with a replacement part #753 06193, a Champion RDJ7J, or an equivalent spark plug.
4. Use a feeler gauge to set the air gap at 0.025 in. (0.635 mm) (Fig. 22).
5. Install the spark plug in the cylinder head. Tighten the spark plug with a 5/8-inch socket, turning it clockwise until snug.
6. Reattach the spark plug boot.

CLEANING AND STORAGE

CLEANING

Use a small brush to clean off the outside of the unit. Do not use strong detergents. Household cleaners that contain aromatic oils such as pine and lemon, and solvents such as kerosene, can damage plastic housing or handle. Wipe off any moisture with a soft cloth.

STORAGE

• Never store a fueled unit where fumes may reach an open flame or spark.
• Allow the engine to cool before storing.
• Store the unit locked up to prevent unauthorized use or damage.
• Store the unit in a dry, well-ventilated area.
• Store the unit out of the reach Of children.

Short Term Storage (1-2 weeks)

1. Store the unit in a horizontal position. If this is impossible, store the unit vertically with the engine at the top.

Long-term Storage

1. Remove the fuel cap, tip the unit, and drain the fuel into an approved container.
2. Start the engine and allow it to run until it Stalls. This ensures that all fuel has been drained from the carburetor.
3. Allow the engine to cool. Remove the spark plug and put 5 drops of any high-quality motor oil or 2-cycle Oil into the cylinder. Pull the starter rope slowly to distribute the oil. Reinstall the spark plug.
4. Thoroughly clean the unit and inspect it for any loose or damaged parts. Repair or replace damaged parts and tighten Bose screws, nuts or bolts. The unit is ready for storage.

Preparing the Unit for Use after Long-term Storage

1. Remove the spark plug and drain all of the oil from the cylinder.

TROUBLESHOOTING

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Remington RM2520 Gas String Trimmer-FAQs