Fuxtec FX-4MS142 - Brush cutter

FX-4MS142 - Brush cutter Fuxtec - Free user manual and instructions

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Brand Fuxtec
Model FX-4MS142
Product type Petrol brush cutter / grass trimmer
Engine type 4-stroke, air-cooled, 142F
Displacement 42.5 cm³
Maximum power 1.25 kW at 6500 min⁻¹
Maximum speed 10,500 min⁻¹
Idle speed 3,000 ± 200 min⁻¹
Sound pressure level (LPA) 104 dB(A) (K=3 dB)
Guaranteed sound power level (LWA) 113 dB(A)
Vibration left handle 8.210 m/s² (k=1.5 m/s²)
Vibration right handle 8.265 m/s² (k=1.5 m/s²)
Maximum cutting diameter (line) 440 mm
Dry weight 8.05 kg
Gross weight 10.0 kg
Fuel tank capacity 550 ml
Oil tank capacity 100 ml
Recommended engine oil FUXTEC 4-stroke oil SAE30 (or SAE 10W-30)
Recommended fuel Unleaded petrol SP98 (E10 max)
Cutting device rotation direction Counterclockwise
Number of handles 2
Cutting device type Nylon cutting head (line) and 3-tooth metal blade
Safety Engine stop, throttle lock, mandatory hearing and eye protection, safety distance 15 m
Maintenance Oil change every 10 h, air filter cleaning, spark plug (gap 0.6–0.7 mm)
Warranty 24 months

Frequently Asked Questions - FX-4MS142 Fuxtec

How to cold start the Fuxtec FX-4MS142 brush cutter?
Place the machine on a flat surface, lower the stop switch, set the choke to 'COLD START', pump the primer bulb 8 to 10 times, then pull the starter cord until resistance is felt. Pull hard to start. Once the engine has fired, set the choke to 'WARM START' and pull again. Let it warm up at idle for 10 minutes.
What oil should I use for the FX-4MS142 engine?
Use exclusively 4-stroke oil. FUXTEC recommends its SAE30 oil or a brand SAE 10W-30 for normal ambient temperature. Never use 2-stroke oil. The oil tank capacity is 100 ml.
What fuel should I use for the Fuxtec brush cutter?
Use unleaded petrol SP98. The engine can run on E10 petrol (max 10% ethanol). Do not use oil/fuel mixture. The tank capacity is 550 ml.
How to change the cutting line on the FX-4MS142?
Turn off the engine. Open the cutting head by turning the locking button. Cut 5 to 6 meters of new line and wind it firmly clockwise around the spool. Thread the ends through the outer holes, then fit the inner and outer spool together by turning until it clicks.
What to do if the engine does not start?
First check the spark plug: clean carbon deposits and adjust the gap to 0.6–0.7 mm. Make sure there is fuel and the fuel line is not blocked. If the spark is weak, the ignition coil or magneto flywheel may be defective. Refer to the 'Troubleshooting' chapter in the manual.
How to maintain the air filter?
Remove the filter cover. Clean the filter element with a non-flammable solvent or high flash point cleaning agent. Let it dry completely, then soak it in fresh engine oil and squeeze to remove excess. Reinstall. Never run the engine without the air filter.
What is the oil tank capacity?
The oil tank capacity is 100 ml. Fill slowly to avoid overflows. Check the level every 10 working hours and top up if necessary.
How to change the metal blade?
Insert the key into the hole of the gear head to lock the shaft. Remove the nut, cover, and top washer. Place the metal blade on the bottom washer, then put the top washer, cover, and tighten the nut. Ensure the blade is securely fastened.
What are the essential safety instructions?
Always wear eye, hearing, and head protection. Maintain a safety distance of at least 15 meters from other people. Do not touch the rotating blade. Use the shoulder strap. Do not smoke while refueling. Read the manual thoroughly before use.
What is the warranty on the FX-4MS142?
The warranty is 24 months from the date of purchase. Wear parts and damage due to improper use are excluded. Keep your receipt. Warranty repairs must be carried out by an authorized dealer.

User questions about FX-4MS142 Fuxtec

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How to change the cutting line of the Fuxtec FX-4MS142 lawn mower?
Frequently Asked Questions - 02/05/2026
Response Notice-Facile

To change the cutting line of your Fuxtec FX-4MS142 lawn mower, follow these simple steps:

Steps to replace the cutting line:

  • 1. Turn off the mower and unplug it to avoid any accidental start.
  • 2. Position the mower to have easy access to the cutting head, usually by placing it upside down on a stable surface.
  • 3. Open the spool by unlocking the cover or turning the locking knob depending on the model.
  • 4. Remove the old line completely from the spool.
  • 5. Cut a new line about 5 to 6 meters long, suitable for the diameter recommended by the manufacturer.
  • 6. Wind the line tightly around the spool in a clockwise direction, making sure to leave about 10 cm of free line at each end.
  • 7. Secure the ends of the line in the notches provided on the spool to hold them in place.
  • 8. Pass the ends of the line through the holes located on the outer part of the spool.
  • 9. Close the spool by assembling the two parts and locking them properly.
  • 10. Replace the spool on the mower and ensure it is securely attached.

Your mower is now ready to be used with a new line, ensuring effective and safe cutting.

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USER MANUAL FX-4MS142 Fuxtec

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Product information

Brand : Fuxtec

Model : FX-4MS142

Category : Brush cutter