ACEUP ENERGY GASOLINE ENGINE OPERATION MANUAL

Part 1: Brief Introduction

Thank you for choosing our general purpose gasoline engine. Key features include:

• Single Cylinder, 4 stroke, Forced Air Cooled
• OHV (Overhead Valve)
• TCI Ignition Method (Transistor Controlled Ignition)
• Splash Lubricated

Proper use and regular maintenance will ensure the engine operates reliably and has an extended lifespan. Please read this manual carefully before use to master correct operation and maintenance methods.

Precautions: Failure to follow the notes and safety precautions may result in personal injury or severe engine damage. Please pay close attention.

Notes:

1. Coupling the engine with equipment must strictly adhere to the rated power output on the engine nameplate. Operating with overload, excessive RPM, or under sustained low load/low RPM is forbidden.
2. Use only specific fuel and lube oil. Ensure they are filtered before use. Keep oil filters clean and change lube oil regularly. Carefully check fuel pipes and joints for looseness and fuel leakage, as leaking fuel is a dangerous situation.
3. Periodically check all bolts and nuts for looseness. A loose bolt or nut can cause serious engine trouble.
4. Regularly clean the air cleaner element and replace it if necessary.
5. Timely clear away dirt and contaminants from cooling fins, fan, and fan cover to ensure normal engine cooling effect.

6. Users should be familiar with the engine's structure and proper operation, perform regular maintenance, and address troubles immediately. Do not operate if the engine is abnormal or has issues.

7. The exhaust muffler becomes very hot during or immediately after engine operation. Do not touch it by hand to avoid burns, and keep children away from the running engine.

Safety Precautions

1. Exhaust Precautions: Engine exhaust contains carbon monoxide, a colorless, odorless, and extremely dangerous gas that can cause unconsciousness or death. Do not operate the engine indoors or in poorly ventilated areas (e.g., tunnels, caves). If use in such areas is necessary, exhaust gas must be vented outside, with the outlet at least 1 meter from doors or windows. Exercise extreme care when operating near people or animals.
2. Fire Prevention: Keep the engine away from flammable materials and hazardous substances (trash, rags, lubricants, explosives). Do not operate while smoking or near an open flame. Avoid use around dry brush, twigs, cloth rags, or other flammable materials. Keep the engine at least 3 feet (1 meter) away from buildings or other structures.
3. Refueling Precautions: Stop the engine before refueling. Do not overfill the fuel tank. If fuel spills, wipe it away carefully and wait until it has dried before starting the engine.
4. Surrounding: Operate the engine on a level surface free of small rocks or loose gravel. If the engine is tilted, fuel may spill. Do not move the engine while it is operating. When transporting the engine over long distances or rough roads, drain the fuel tank to prevent leakage.

Part 2: Preparation Before Operation

2.1 Check Lube Oil Level

When the engine is stopped, unscrew the oil dipstick to check the lube oil level. If it is below the minimum level, fill with lube oil to reach the required height but not exceeding the maximum level. Lube oil class 15W/40SAE is preferred.

Diagram Description (Figure 2-1): Shows the oil dipstick hole (1), maximum oil level (2), and minimum oil level (3).

2.2 Check Fuel Oil Level

Open the fuel tank cap to check the fuel oil level. If it is too low, fill the gasoline through the fill-in hole until the fuel level reaches the red stop plate inside the strainer. Gasoline class #90 or up is preferred. Do not mix gasoline with lube oil. Ensure fuel oil is clean and free of dust or impurities.

Diagram Description (Figure 2-2): Shows the fuel tank (1), fill-in hole (2), and red scale line for upper fuel level (3).

2.3 Check Air Cleaner

The air cleaner is a dry type with paper and foam filter elements. To check if the filter element is clean, remove the air cleaner case. If dust or dirt is present, clean it in gasoline or kerosene, then dry it. Repeat cleaning several times before reinstalling.

Diagram Description (Figure 2-3): Illustrates the air cleaner assembly, including butterfly nuts (1, 3), air cleaner cover (2), paper filter element (4), foam filter element (5), gasket (6), and cleaner base plate (7).

Part 3: Starting and Stopping of Engine

3.1 Start the Engine

1. Move the fuel valve lever to the ON position.
2. To start a cold engine, move the choke lever to the CLOSED position. To restart a warm engine, leave the choke lever in the OPEN position.
3. Move the throttle lever away from the MIN. position, about 1/3 of the way toward the MAX. position.
4. Turn the engine switch to the ON position. (Diagrams show positions for 'EXCEPT ELECTRIC STARTER TYPES' and 'ELECTRIC STARTER TYPES').
5. Operate the starter:
   • Recoil starter: Pull the starter grip lightly until resistance is felt, then pull briskly. Return the starter grip gently.
   • Electric starter: Turn the key to the START position and hold it until the engine starts. If the engine fails to start within 5 seconds, release the key and wait at least 10 seconds before trying again.

NOTICE: Do not allow the starter grip to snap back against the engine. Return it gently to prevent damage.

3.2 Stop the Engine

For emergency stops, turn the engine switch to the OFF position. For normal shutdown, follow these steps:

1. Move the throttle lever to the MIN. position.
2. Turn the engine switch to the OFF position.
3. Turn the fuel valve lever to the OFF position.

Part 4: Maintenance

4.1 Routine Maintenance

• Check the air cleaner filter element; remove dirt and dust to keep it clean.
• Check bolts and nuts to ensure they are fastened.
• Check the lube oil level (refer to Section 2.1).

4.2 Air Cleaner Cleaning

The air cleaner should be cleaned after every 25 hours of running. Follow the cleaning method described in Section 2.3.

4.3 Spark Plug Check

Check the spark plug after every 50 hours of running. Remove carbon deposits and adjust the gap to 0.6~0.7 mm (0.024~0.028in). Check the radiating fins and remove any dirt.

Diagram Description (Figure 4-1): Shows spark plug removal (1) and spark plug gap adjustment (2). Also shows oil drain plug (1), fill oil hole (2), and specific oil level (3).

4.4 Lube Oil Replacement

Unscrew the drain plug, tilt the engine slightly to drain the lube oil. Fill with kerosene to clean the inside, then drain the kerosene. Tighten the drain plug and fill with fresh lube oil to the specific level.

4.5 Fuel Tank and Filter Strainer Cleaning

Clean the fuel tank and filter strainer after every 100 hours of running. Open the fuel tank cap, remove and clean the filter strainer. Clean the internal surface of the fuel tank, removing dirt and water. Reinstall the tank and strainer, then fill with fresh fuel oil to the red scale line (refer to Section 2.0).

4.6 Oil Tube Check

Check the oil tubes for aging, hardening, or cracks after every 2 years of use. Replace if necessary and tighten joints to prevent leakage.

4.7 Engine Storage

For long-term storage:

1. Drain all fuel from the fuel tank and clean its internal surface. Open the fuel cock, unscrew the carburetor drain plug, and drain the carburetor completely. Tighten the drain plug.
2. Unscrew the drain plug at the bottom of the crankcase and drain the lube oil completely. Tighten the drain plug.
3. Clean the outer surface of the engine with clean cotton and remove dirt or dust. Store the engine in a dry place.

4.8 Useful Data

Important Torque Values (N.m)

Tune-up Specifications

Part 5: Troubleshooting

5.1 Low Power Output

5.2 Engine Can Not Run Smoothly

5.3 Stop Suddenly When Running

5.4 Engine is Excessively Hot

NOTE: The engine should be operated under a certain temperature range. Generally, the temperature at the flow guard outlet is permitted between 80~110°C, while the temperature of the crankcase under the magneto motor is around 60°C. If the temperature surpasses the upper limit, it indicates the engine is excessively hot.

5.5 Abnormal Noise Occurs When Engine is Running

Part 6: Dismantlement and Assembly

6.1 Dismantling Precautions

• Dismantle properly. Do not dismantle parts that may not be removed. Try to avoid dismantling sealing parts and moving parts like the piston and piston ring.
• Never dismantle parts except the spark plug, carburetor, and magneto motor in a hot state to prevent damage or deformation.
• Consider installation during dismantling: Make marks on parts in special locations (e.g., piston ring, cylinder gasket sides, connecting wire). Keep parts from the same component together for convenient reassembly.
• Removed parts should be cleaned and stored in groups according to their installation relationship.
• When dismantling bolts, loosen them in diagonals first, then turn them off.
• Use extractors to dismantle tight parts such as bearings.
• For dismantling starting bolts with opposite threads, turn them loose clockwise and then apply a screw extractor.

6.2 Dismantling Procedure

1. Drain the fuel from the fuel tank completely.
2. Dismantle the spark plug and check its electrode gap.
3. Drain the lube oil from the crankcase.
4. Dismantle the engine flow guard.
5. Turn loose the lock screw of the carburetor clip, remove the carburetor and its connecting parts.
6. Drive out the muffler lock screws, remove the muffler and its gasket.
7. Turn loose bolts in diagonals first, then drive them out. Remove the cylinder head and cylinder gasket.
8. Dismantle the starter.
9. Dismantle the fly wheel.
10. Dismantle the magneto motor.
11. Dismantle the crankcase cover bolts, then dismantle the crankcase.
12. Dismantle the camshaft and valve tappet.
13. Dismantle the piston and tie rod.
14. Dismantle the crankshaft.
15. Dismantle both the intake and exhaust valves and their conveying parts.

6.3 Assembling Precautions

• Before installation, clean all parts.
• Before installation, ensure all parts are qualified. Otherwise, repair or replace disqualified parts.
• Oil important assembling surfaces, such as the surface between the cylinder bushing and piston, with lube oil.
• When twisting force is required for installing bolts (e.g., tie rod bolts, cylinder cover bolts), use a torque spanner to turn the bolts to the specific torque.

6.4 Assembling Procedure

1. Clean all parts.
2. Install the crankshaft.
3. Install the valves.
4. Assemble the piston and tie rod in the correct order. Apply a small amount of lube oil into the cylinder and tighten the tie rod bolts to the specific torque.
5. Assemble the valve tappets and camshaft, adjust the timing mark correctly, and install the timing gear properly.
6. Assemble the cylinder gasket and cylinder head, and tighten the cylinder head bolts to the specific torque.
7. Install the fly wheel.
8. Install the starter.
9. Install the carburetor and air cleaner.
10. Install the muffler.
11. Install the engine flow guard.
12. Install the fuel tank and connect the fuel hose properly.
13. Fill the crankcase with lube oil and fill the fuel tank with specific gasoline.
14. Install the spark plug.
15. Check connecting joints for reliability and smooth operation. Check speed-adjusting parts for good condition.
16. Start the engine and observe its running.

Engine Specifications Table

Note: The data mentioned above is only for reference!

Part 7: Label Explanation

• ⚠️ Caution
• ⚡ Electrical hazard
• ? Fire hazard
• ? Read the operator's instruction manual before use
• ? Carbon monoxide (CO) danger
• ♨️ Risk of being burnt