Shulemin 52cc 2-in-1 Gas Powered Grass Trimmer and Brush Cutter Instruction Manual

1. Important Safety Information

Read and understand all safety warnings and instructions before operating this tool. Failure to follow the warnings and instructions may result in serious injury.

• Always wear appropriate personal protective equipment (PPE), including safety glasses or goggles, hearing protection, and heavy-duty gloves.
• Wear long pants and sturdy, non-slip footwear.
• Keep bystanders, children, and pets at least 50 feet (15 meters) away from the work area.
• Do not operate the trimmer in wet conditions or rain.
• Inspect the work area for debris, rocks, or other objects that could be thrown by the cutting attachment. Clear the area before starting.
• Ensure all guards and handles are properly installed and secure before each use.
• Never operate the tool with a damaged or missing guard.
• Handle fuel with extreme care. It is highly flammable.
• Do not smoke while refueling.
• Refuel in a well-ventilated outdoor area, away from sparks or open flames.
• Allow the engine to cool before refueling.
• If the cutting attachment strikes an object, stop the engine immediately and inspect for damage. Repair any damage before resuming operation.
• Use protective eyewear. Do not look directly at the cutting blade. Keep out of reach of children.

2. Product Overview

The Shulemin 52cc 2-in-1 Gas Powered Trimmer is a versatile tool designed for trimming grass and cutting brush. It features a 52cc engine and can be used with both a string trimmer head and a 3-tooth blade.

Figure 2.1: Main Components of the Trimmer

Key Components:

• Engine (52cc): Provides power for cutting.
• Fuel Tank: Holds the fuel mixture.
• Starter Roll: Used to manually start the engine.
• Throttle Trigger: Controls engine speed.
• Straight Shaft: Connects the engine to the cutting head.
• Safety Guard: Protects the operator from debris and the cutting attachment.
• Cutting Head: Interchangeable between string trimmer head and 3-tooth blade.
• U-Handle: Provides control and stability during operation.

3. Package Contents

Carefully unpack all items and ensure you have received all components listed below. If any parts are missing or damaged, contact customer service.

Figure 3.1: Complete Package Contents

• 1 x 52CC Engine Unit
• 1 x Control Rod
• 1 x Extension Rod
• 1 x String Trimmer Head (Plastic Head)
• 1 x 3-Teeth Blade
• 1 x Shoulder Strap
• 1 Pair of Gloves
• 1 x Funnel
• 1 x Oil Can (Mixing Bottle)
• 1 x Installation Kit (includes tools like spark plug wrench, hex keys)
• 1 Pair of Safety Glasses/Goggles

Figure 3.2: Accessories and Main Parts

4. Assembly Instructions

Follow these steps carefully to assemble your Shulemin 2-in-1 Trimmer. Refer to the component diagrams in Section 2 and 3.

1. Attach the Control Rod and Extension Rod: Connect the control rod (with the U-handle and throttle trigger) to the extension rod. Ensure the connection is secure and the locking mechanism (if present) is engaged.
2. Connect the Engine Unit: Attach the assembled rod to the engine unit. Align the shaft and secure it with the provided fasteners. Ensure the drive cable from the engine connects properly to the shaft.
3. Install the U-Handle: Position the U-handle on the control rod for comfortable operation and tighten its clamps securely. The throttle trigger should be easily accessible.
4. Attach the Safety Guard: Mount the safety guard to the lower part of the shaft, just above where the cutting head will be installed. Ensure it is oriented correctly to deflect debris away from the operator. Tighten all bolts firmly.
5. Install the Cutting Head:
   • For String Trimmer Head: Align the plastic head with the shaft's attachment point and secure it according to the instructions.
   • For 3-Teeth Blade: Place the blade onto the shaft's mounting flange, ensuring it sits flat. Install the washer and nut, then tighten securely using the provided tools. Ensure the blade rotates freely but has no wobble.

   Warning: Always ensure the engine is off and the spark plug cap is removed before changing cutting attachments.

6. Attach the Shoulder Strap: Connect the shoulder strap to the designated attachment point on the shaft. Adjust the strap length for comfortable and balanced carrying.

Figure 4.1: Assembly Components

5. Fuel Mixing and Filling

This trimmer uses a 2-stroke engine and requires a specific mixture of unleaded gasoline and 2-stroke engine oil. Refer to the engine unit for the exact mixing ratio, typically 25:1 or 50:1 (gasoline:oil).

1. Prepare the Fuel Mixture: Use the provided oil can (mixing bottle) to accurately measure the gasoline and 2-stroke oil.
   • Fill the mixing bottle with the required amount of fresh, unleaded gasoline (minimum 89 octane).
   • Add the correct amount of 2-stroke engine oil for air-cooled engines.
   • Securely close the mixing bottle and shake it thoroughly to ensure the fuel and oil are well mixed.
2. Fill the Fuel Tank:
   • Ensure the engine is off and cool.
   • Move to a well-ventilated outdoor area, away from any ignition sources.
   • Carefully open the fuel tank cap on the engine.
   • Using the funnel, slowly pour the mixed fuel into the fuel tank. Do not overfill; leave some space for expansion.
   • Securely close the fuel tank cap. Wipe up any spilled fuel immediately.

Caution: Never use straight gasoline or automotive oil in this 2-stroke engine. This will cause severe engine damage.

6. Operating Instructions

Before starting, ensure you have read and understood all safety information and the trimmer is properly assembled and fueled.

6.1 Starting the Engine

1. Place the trimmer on a flat, stable surface.
2. Ensure the cutting attachment is clear of any obstructions.
3. Set the ON/OFF switch to the "ON" position.
4. Engage the choke lever (if cold start).
5. Press the primer bulb several times until fuel is visible in the return line.
6. Pull the starter rope (Starter Roll) firmly and steadily until the engine attempts to start or starts briefly. Do not pull the rope to its full extension.
7. Once the engine fires or starts briefly, disengage the choke lever.
8. Pull the starter rope again until the engine starts and runs smoothly.
9. Allow the engine to warm up for a few moments before engaging the throttle.

6.2 Using the Trimmer/Brush Cutter

• Wear the shoulder strap for balanced weight distribution and reduced fatigue.
• Hold the trimmer firmly with both hands on the U-handle.
• Maintain a stable stance and keep the cutting head away from your body.
• Gradually press the throttle trigger to increase engine speed.
• For String Trimming: Use a sweeping motion to cut grass. Avoid hitting hard surfaces or objects.
• For Brush Cutting: Use the 3-tooth blade for thicker weeds and brush. Approach the material slowly and cut in small sections. Be aware of kickback.
• Always keep the safety guard between you and the cutting attachment.

Figure 6.1: Operating the Trimmer

6.3 Stopping the Engine

1. Release the throttle trigger to allow the engine to return to idle.
2. Move the ON/OFF switch to the "OFF" position.
3. Wait for the cutting attachment to come to a complete stop before setting the trimmer down.

7. Maintenance

Regular maintenance ensures optimal performance and extends the life of your trimmer. Always ensure the engine is off and cool, and the spark plug cap is removed before performing any maintenance.

• Cleaning: After each use, clean the trimmer housing, engine fins, and cutting head. Remove any grass, dirt, or debris. Do not use water to clean the engine.
• Air Filter: Check the air filter regularly (every 5-10 hours of operation). Clean or replace if it is dirty or clogged. A dirty air filter can reduce engine performance.
• Spark Plug: Inspect the spark plug every 20-30 hours of operation. Clean or replace if it is fouled or worn. Ensure the gap is correct according to engine specifications.
• Fuel Filter: Periodically check the fuel filter located inside the fuel tank. Replace if it is clogged.
• Cutting Attachments:
  • String Trimmer Head: Replace the trimmer line as needed. Inspect the head for cracks or damage.
  • 3-Teeth Blade: Inspect the blade for dullness, nicks, or cracks. Sharpen or replace as necessary. A dull blade can cause excessive vibration and strain on the engine.
• Storage:
  • For short-term storage, ensure the trimmer is clean and dry.
  • For long-term storage (over 30 days), drain all fuel from the tank and carburetor. Run the engine until it stops from lack of fuel. This prevents fuel degradation and carburetor issues.
  • Store the trimmer in a cool, dry, well-ventilated area, away from direct sunlight and heat sources.

8. Troubleshooting

This section addresses common issues you might encounter with your trimmer. For problems not listed here, contact customer service.

9. Specifications

Technical details for the Shulemin 52cc 2-in-1 Gas Powered Trimmer.

Figure 9.1: Product Dimensions

10. Warranty and Customer Support

Shulemin is committed to ensuring your satisfaction with our products. For any questions regarding quality assurance, product operation, or if you encounter issues not covered in this manual, please contact the seller's customer service.

Please retain your proof of purchase for warranty claims.