LS40-139-BR - Lawn mower NAC - Free user manual and instructions

Product Type	Lawn Mower
Brand	NAC
Model	LS40-139-BR
Cutting Width	40 cm (approx.)
Engine Type	4-Stroke, Petrol (Gasoline)
Engine Displacement	139 cc (approx.)
Power	~3.0 kW (4.0 HP)
Fuel Type	Unleaded Petrol
Start Type	Recoil Start
Cutting Height Adjustment	Central lever, multiple positions (approx. 25-75 mm)
Grass Collector	Included, capacity ~60 L
Wheels	4 wheels, plastic, front and rear
Handle	Foldable, adjustable height
Weight	~25 kg
Dimensions (L x W x H)	70 x 50 x 40 cm (approx., folded)
Safety Features	Blade brake, engine stop handle, safety shield
Maintenance	Oil change, spark plug cleaning, blade sharpening, air filter cleaning
Spare Parts	Available: blades, spark plugs, air filters, wheels, belts
Noise Level	~96 dB (typical for petrol mowers)
CE Certification	Yes

Frequently Asked Questions - LS40-139-BR NAC

What type of fuel does the NAC LS40-139-BR lawn mower use?

The NAC LS40-139-BR uses unleaded petrol (gasoline) with an octane rating of at least 95. Do not use ethanol blends above 10%.

How do I start the lawn mower?

Ensure the engine stop handle is pressed against the handlebar. Pull the recoil starter cord firmly and quickly. If the engine is cold, close the choke before starting and open it once the engine warms up.

Can I adjust the cutting height?</br>

Yes, use the central lever to adjust the cutting height. Typically, you can set it between 25 mm and 75 mm depending on grass conditions.

How often should I change the engine oil?

Change the oil after the first 5 hours of use, then every 25 hours or at the start of each season. Use SAE 30 or 10W-30 oil.

What should I do if the mower vibrates excessively?

Excessive vibration may indicate a loose or damaged blade, unbalanced cutting deck, or debris trapped under the mower. Stop the engine, disconnect the spark plug, and inspect the blade and underside.

How do I clean the grass collector?

Empty the collector after each use. Wash with water and mild detergent, then let it dry completely before storing to prevent mildew.

Is the mower suitable for wet grass?

No, mowing wet grass can cause clumping, slippery conditions, and increased risk of electric shock or engine damage. Wait until the grass is dry.

How do I sharpen the blade?

Remove the blade by loosening the central bolt. Secure the blade in a vise and file the cutting edge at the original angle. Ensure the blade is balanced before reinstalling.

What safety precautions should I take?

Always wear sturdy shoes, long trousers, and goggles. Keep bystanders and pets away. Never operate without the grass collector or discharge guard. Avoid slopes and wet conditions.

Where can I find spare parts?

Spare parts like blades, spark plugs, air filters, and wheels are available from NAC dealers or online stores. Use genuine parts for safety and performance.

USER MANUAL LS40-139-BR NAC

Black-and-white photo of a NAC lawn mower with visible blades and wheels (no text or symbols)

CE

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⚠ Wprowadzenie

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