1. Introduction
This manual provides essential instructions for the safe and efficient operation, setup, and maintenance of your STIGA Collector 48 S B thermal lawnmower. Please read this manual thoroughly before operating the machine and keep it for future reference.
The STIGA Collector 48 S B is a powerful and reliable petrol lawnmower designed for maintaining large gardens. It features a 46 cm cutting width, a 60-liter grass collection bag, and an ergonomic design for comfortable use.
2. Safety Information
Always prioritize safety when operating the lawnmower. Failure to follow safety instructions can result in serious injury or damage to the machine.
- Read the Manual: Familiarize yourself with all controls and proper use of the equipment.
- Personal Protective Equipment (PPE): Always wear sturdy footwear, long trousers, and eye protection. Hearing protection is recommended.
- Clear the Area: Before mowing, remove all objects such as stones, sticks, wires, and toys from the lawn.
- Keep Bystanders Away: Ensure children, pets, and other people are at a safe distance (at least 15 meters) from the mowing area.
- Fuel Handling: Handle fuel with extreme care. It is highly flammable. Refuel outdoors only and do not smoke while refueling.
- Engine Off: Always turn off the engine and disconnect the spark plug wire before performing any adjustments, cleaning, or maintenance.
- Slope Operation: Exercise extreme caution when operating on slopes. Mow across the face of slopes, never up and down.
- Blade Safety: The blade is sharp. Never touch the blade while the engine is running.
- Maintenance: Regularly inspect the machine for wear or damage. Replace worn or damaged parts with genuine STIGA parts.
3. Setup and Assembly
Your lawnmower requires some assembly before its first use. Follow these steps carefully.
3.1 Unpacking
- Carefully remove all components from the packaging.
- Check the contents against the packing list to ensure all parts are present.
- Remove any protective materials.
3.2 Handle Assembly
The handle comes folded for shipping. Unfold and secure it in the operating position.
- Lift the upper handle section into the upright position.
- Secure the handle using the provided knobs and bolts. Ensure it is firmly locked.
- Adjust the handle height to a comfortable position using the ergonomic adjustable handle mechanism.

Image: The adjustable handle of the STIGA Collector 48 S B lawnmower, shown in its operating position.

Image: Close-up of the engine cover and the attachment point for the handle, showing the securing knob.
3.3 Grass Collector Assembly
Assemble the 60-liter grass collector and attach it to the lawnmower.
- Follow the instructions provided with the grass collector for assembly (if required).
- Lift the rear discharge flap of the lawnmower.
- Hook the grass collector onto the designated points under the flap. Ensure it is securely seated.

Image: The 60-liter grass collection bag attached to the rear of the STIGA Collector 48 S B lawnmower.
3.4 Fuel and Oil
This lawnmower is powered by a petrol engine. It requires both fuel and engine oil.
- Engine Oil: Before first use, fill the engine with the recommended engine oil (refer to the engine manual for type and quantity). Check oil level before each use.
- Fuel: Fill the fuel tank with unleaded petrol. Do not overfill. Always refuel in a well-ventilated area, away from open flames.
3.5 Cutting Height Adjustment
The cutting height can be adjusted to six different positions, from 22 mm to 65 mm.
- Ensure the engine is off and the spark plug wire is disconnected.
- Locate the height adjustment lever, typically near one of the wheels.
- Pull the lever outwards and move it to the desired cutting height position.
- Ensure all wheels are set to the same height for an even cut.

Image: Close-up of the cutting height adjustment lever located near the rear wheel, showing the multiple height settings.
4. Operating Instructions
4.1 Starting the Engine
- Ensure the fuel tank is filled and the oil level is correct.
- Move the throttle lever (if present) to the "START" or "CHOKE" position.
- Press the primer bulb (if present) a few times until fuel is visible.
- Hold the engine brake lever against the handle.
- Pull the starter cord firmly until the engine starts.
- Once the engine starts, gradually move the throttle lever to the "RUN" position.
4.2 Mowing Technique
- Mow in overlapping rows to ensure an even cut.
- Avoid cutting wet grass, as it can clog the mower and lead to an uneven finish.
- For best results, do not remove more than one-third of the grass height in a single pass.
- The lawnmower is self-propelled, making it easier to maneuver. Engage the drive lever to activate the traction.

Image: The front handle of the STIGA Collector 48 S B, designed for easy lifting and maneuvering of the lawnmower.
4.3 Stopping the Engine
To stop the engine, release the engine brake lever. The engine will shut off automatically.
5. Maintenance
Regular maintenance ensures the longevity and optimal performance of your lawnmower. Always ensure the engine is off and the spark plug wire is disconnected before performing any maintenance.
5.1 Cleaning
- After each use, clean the underside of the mower deck to prevent grass buildup.
- Use a brush or scraper. Avoid using high-pressure water directly on the engine or electrical components.
- The mower can be tilted forward for easier access to the blade area.
5.2 Blade Care
- Inspect the blade regularly for sharpness and damage.
- A dull blade tears grass, leading to an unhealthy lawn. Sharpen or replace the blade as needed.
- When replacing the blade, ensure it is balanced to prevent vibration.
5.3 Engine Maintenance
- Oil Change: Change the engine oil after the first 5 hours of operation, then every 25-50 hours or annually.
- Air Filter: Clean or replace the air filter regularly, especially in dusty conditions.
- Spark Plug: Inspect and clean the spark plug annually. Replace if worn.
- Refer to the separate engine manual for detailed engine maintenance procedures.
5.4 Storage
- Before storing for an extended period, drain the fuel tank or add a fuel stabilizer.
- Clean the entire machine thoroughly.
- Store the lawnmower in a dry, well-ventilated area, away from children and pets.
- The handle can be folded for compact storage.
6. Troubleshooting
This section addresses common issues you might encounter. For problems not listed here, contact an authorized service center.
| Problem | Possible Cause | Solution |
|---|---|---|
| Engine does not start | No fuel; old fuel; spark plug issue; engine brake not engaged. | Check fuel level; use fresh fuel; inspect/replace spark plug; ensure engine brake lever is held. |
| Engine runs poorly | Dirty air filter; old fuel; spark plug issue. | Clean/replace air filter; use fresh fuel; inspect/replace spark plug. |
| Uneven cut | Dull blade; uneven cutting height adjustment; mowing wet grass. | Sharpen/replace blade; ensure all wheels are at the same height; mow dry grass. |
| Excessive vibration | Unbalanced or bent blade; loose components. | Inspect blade for damage and balance; check all fasteners. |
| Grass collector not filling | Clogged discharge chute; grass too long/wet; collector not properly attached. | Clear chute; mow shorter/dryer grass; re-attach collector securely. |
7. Specifications
Key technical specifications for the STIGA Collector 48 S B thermal lawnmower.
| Feature | Value |
|---|---|
| Model Number | Collector 48 S B – B&S 450 E |
| Brand | STIGA |
| Power Source | Gasoline (Petrol) |
| Engine Power | 1750 W |
| Cutting Width | 46 Centimeters |
| Cutting Height Positions | 6 positions (22 mm to 65 mm) |
| Grass Collector Capacity | 60 Liters |
| Operation Mode | Self-propelled |
| Product Dimensions (L x W x H) | 153.5 x 53.5 x 119.5 cm |
| Item Weight | 27 Kilograms |
| Material | Metal |
| Color | Black/Yellow/Grey |
| Assembly Required | Yes |
8. Warranty and Support
Your STIGA Collector 48 S B lawnmower is covered by a manufacturer's warranty. Please refer to the warranty card included with your product for specific terms and conditions.
- Warranty Period: The availability of spare parts in the EU is stated as 5 years. For specific product warranty, consult your purchase documentation.
- Technical Support: For technical assistance, spare parts, or service, please contact your authorized STIGA dealer or visit the official STIGA website.
- Online Resources: Additional information, FAQs, and product registration may be available on the official STIGA website: www.stiga.com