1. Introduction
This manual provides essential information for the safe and efficient operation, maintenance, and troubleshooting of your LONCIN G252 FL 4-stroke gasoline engine. Please read this manual thoroughly before operating the engine to ensure proper use and to prevent injury or damage.
The LONCIN G252 FL is an 8 HP (7.1 HP rated) electric start, single-cylinder, horizontal shaft engine designed for various applications requiring reliable power.
2. Safety Instructions
WARNING: Failure to follow these safety instructions could result in serious injury or death.
- Read the Manual: Always read and understand the entire instruction manual before operating the engine.
- Ventilation: Operate the engine only in well-ventilated areas. Engine exhaust contains carbon monoxide, a colorless, odorless, poisonous gas.
- Fuel Safety: Gasoline is highly flammable. Refuel in a well-ventilated area with the engine off and cool. Do not smoke or allow flames or sparks near the engine or fuel tank.
- Hot Surfaces: The engine and exhaust system become very hot during operation and remain hot for a period after shutdown. Avoid contact to prevent burns.
- Moving Parts: Keep hands, feet, and clothing away from moving parts such as the flywheel and shaft.
- Children and Pets: Keep children and pets away from the engine, especially during operation.
- Personal Protective Equipment (PPE): Wear appropriate PPE, including eye protection, gloves, and hearing protection, when operating or servicing the engine.
- Engine Stability: Ensure the engine is placed on a stable, level surface before starting and operating.
3. Setup and Preparation
3.1 Unpacking
Carefully remove the engine from its packaging. Inspect for any shipping damage. Retain packaging materials for future transport if needed.
3.2 Adding Engine Oil
The engine is shipped without oil. It is crucial to add the correct type and amount of oil before the first start. Refer to the specifications for oil type and capacity.
- Place the engine on a level surface.
- Remove the oil filler cap/dipstick.
- Slowly add 1.1 liters of recommended 4-stroke engine oil (e.g., SAE 10W-30) until the oil level reaches the upper mark on the dipstick. Do not overfill.
- Securely replace the oil filler cap/dipstick.
Image 1: Side view of the LONCIN G252 FL engine, showing the general layout and location of the oil filler cap (typically near the bottom of the crankcase).
3.3 Adding Fuel
WARNING: Use only fresh, clean unleaded gasoline. Do not use E85 or gasoline containing more than 10% ethanol.
- Ensure the engine is off and cool.
- Open the fuel tank cap.
- Carefully fill the fuel tank with unleaded gasoline, up to the indicated fill line (approximately 6 liters capacity). Do not overfill.
- Securely close the fuel tank cap.
Image 2: Another view of the LONCIN G252 FL engine, highlighting the fuel tank located on top of the engine.
3.4 Connecting Battery (Electric Start Models)
For electric start models, connect a suitable 12V battery (not included) to the engine's electric start terminals. Ensure correct polarity: positive (+) to positive, negative (-) to negative. Refer to the wiring diagram if available.
4. Operating Instructions
4.1 Pre-Start Checklist
- Check engine oil level.
- Check fuel level.
- Ensure air filter is clean and properly installed.
- Verify all connections are secure.
- Ensure the engine is on a stable, level surface.
4.2 Starting the Engine
The LONCIN G252 FL engine features both electric start and recoil (manual) start options.
Electric Start:
- Turn the fuel valve to the "ON" position.
- Move the choke lever to the "CLOSED" position (for cold starts). For warm starts, the choke may not be necessary.
- Turn the engine switch to the "ON" position.
- Turn the key or press the start button. Release once the engine starts.
- Once the engine starts, slowly move the choke lever to the "OPEN" position.
Recoil Start:
- Turn the fuel valve to the "ON" position.
- Move the choke lever to the "CLOSED" position (for cold starts).
- Turn the engine switch to the "ON" position.
- Grasp the recoil starter handle firmly and pull slowly until resistance is felt, then pull quickly and smoothly. Do not let the rope snap back.
- Repeat until the engine starts.
- Once the engine starts, slowly move the choke lever to the "OPEN" position.
Image 3: View of the LONCIN G252 FL engine from the recoil starter side, also showing the air filter housing.
4.3 Adjusting Engine Speed (RPM)
The engine's RPM is adjustable via the throttle control lever. Move the lever to increase or decrease engine speed as required by your application.
4.4 Stopping the Engine
- Reduce engine speed to idle.
- Turn the engine switch to the "OFF" position.
- Turn the fuel valve to the "OFF" position to prevent fuel leakage and carburetor issues during storage.
5. Maintenance
WARNING: Always turn off the engine and disconnect the spark plug cap before performing any maintenance or inspection to prevent accidental starting.
Regular maintenance is essential for optimal performance and longevity of your engine.
5.1 Maintenance Schedule
| Item | Every Use | Every 25 Hours / Monthly | Every 100 Hours / Annually |
|---|---|---|---|
| Check Engine Oil Level | ✓ | ||
| Clean Air Filter | ✓ | ||
| Change Engine Oil | (First 20 hours, then) | ✓ | |
| Inspect Spark Plug | ✓ | ||
| Inspect Fuel Filter/Lines | ✓ |
5.2 Air Filter Maintenance
A dirty air filter will reduce engine performance and increase fuel consumption. Clean or replace the air filter regularly.
- Remove the air filter cover.
- Remove the foam element. Wash it in warm, soapy water, rinse thoroughly, and allow to air dry completely. Lightly oil with engine oil and squeeze out excess.
- If a paper element is present, tap it gently to remove loose dirt. Replace if heavily soiled or damaged.
- Reinstall the air filter elements and cover.
5.3 Oil Change
Change the engine oil when the engine is warm to ensure proper drainage.
- Place a suitable container under the oil drain plug.
- Remove the oil drain plug and the oil filler cap/dipstick to allow oil to drain completely.
- Once drained, reinstall the oil drain plug securely.
- Refill with 1.1 liters of recommended engine oil (e.g., SAE 10W-30).
- Check the oil level with the dipstick and replace the filler cap.
5.4 Spark Plug Inspection
Inspect the spark plug for wear, carbon buildup, or damage. Clean or replace as necessary. Ensure the gap is set to the manufacturer's specification (refer to a service manual for exact gap, typically 0.7-0.8mm).
6. Troubleshooting
This section provides solutions to common operating problems. For more complex issues, consult a qualified service technician.
| Problem | Possible Cause | Solution |
|---|---|---|
| Engine will not start | No fuel Engine switch OFF Choke incorrect Low oil level Spark plug fouled/faulty Battery low (electric start) | Add fuel Turn switch ON Adjust choke Add oil Clean/replace spark plug Charge/replace battery |
| Engine runs poorly/lacks power | Dirty air filter Stale fuel Spark plug issues Carburetor issues | Clean/replace air filter Drain and refill with fresh fuel Inspect/replace spark plug Clean carburetor (professional service recommended) |
| Excessive smoke | Overfilled oil Wrong oil type Engine wear | Drain excess oil Use recommended oil Consult service technician |
7. Specifications
| Feature | Specification |
|---|---|
| Engine Type | 4-Stroke, Single Cylinder, Horizontal Shaft |
| Shaft Type | Conical |
| Shaft Diameter | 23 / 18 mm |
| Shaft Length | 30 mm |
| Displacement | 252 cc |
| Rated Power | 7.1 HP |
| Starting System | Electric Start / Recoil Start |
| Choke | Manual Remote |
| RPM | Adjustable |
| Fuel System | Carburetor |
| Fuel Type | Unleaded Gasoline |
| Fuel Tank Capacity | 6 Liters |
| Lubrication | Splash |
| Oil Capacity | 1.1 Liters |
| Flywheel | Heavy |
8. Warranty and Support
Specific warranty information for this LONCIN engine model is typically provided by the retailer or manufacturer at the time of purchase. Please refer to your purchase documentation for details regarding warranty coverage, terms, and conditions.
For technical support, spare parts, or service inquiries, please contact your authorized LONCIN dealer or the point of purchase. Always provide your engine model number (G252 FL) and serial number when seeking assistance.
