
Neo-tec NH8120 120cc 28 36 42in Gas Chainsaw for Heavy-Duty Use
Key Features
118.8cc 8HP Heavy Duty Chainsaw for Heavy Logging
Safety Assurance
50Inch/125cm Max Cut Professional Logging
Upgrade Highlights
Quick-release Air Filter
Enables fast cleaning and replacement in the field, reducing maintenance downtime.
Adjustable Oil Flow Prolong Chain Lifespan
Manual oil adjustment lever to extend chain service life and increase lubrication volume by up to 30%.
Professional Anti-vibration System
Greatly reduces handle vibration during use, helping to minimize operator fatigue and improve overall comfort during extended work.
Switchable Sprocket Options Available
3/8 Sprocket: agile and versatile for daily logging and firewood tasks.
.404 Sprocket: stable and high-torque for heavy-duty cutting and timber milling.
Product Comparison
Discover More DifferenceNS8105FM
SKU
F070WUS
SKU
NH8120US
SKU
2-Stroke
Engine Type
2-Stroke
Engine Type
2-Stroke
Engine Type
105cc
Displacement
105cc
Displacement
118.8cc
Displacement
4.6kW/ 6.1HP
Max Power
4.6kW/ 6.1HP
Max Power
6.0kW/ 8HP
Max Power
8500rpm
Maximum Engine Speed
with Cutting Attachment
with Cutting Attachment
8500rpm
Maximum Engine Speed
with Cutting Attachment
with Cutting Attachment
10000rpm
Maximum Engine Speed
with Cutting Attachment
with Cutting Attachment
2800rpm
Maximum Engine Speed
at Idle Speed
at Idle Speed
2800rpm
Maximum Engine Speed
at Idle Speed
at Idle Speed
2800rpm
Maximum Engine Speed
at Idle Speed
at Idle Speed
Pull Start
Start Type
Pull Start
Start Type
Pull Start
Start Type
FB 25:1 Fuel-Oil Mix Ratio,FD 40:1 Fuel-Oil Mix Ratio
Fuel to Oil Mix
FB 25:1 Fuel-Oil Mix Ratio,FD 40:1 Fuel-Oil Mix Ratio
Fuel to Oil Mix
FB 25:1 Fuel-Oil Mix Ratio,FD 40:1 Fuel-Oil Mix Ratio
Fuel to Oil Mix
🪵Heavy-Duty + Chainsaw Milling
Application
🪵Heavy-Duty + Chainsaw Milling
Application
🪵Heavy-Duty + Chainsaw Milling
Application
15 mins
Full-Load Running Time (Lab-Tested Reference)
15 mins
Full-Load Running Time (Lab-Tested Reference)
18 mins
Full-Load Running Time (Lab-Tested Reference)
Magnesium alloy
Crankcase Materials
Magnesium alloy
Crankcase Materials
Magnesium alloy
Crankcase Materials
Rubber Buffer
Shock Absorption System
Rubber Buffer
Shock Absorption System
Spring Buffer
Shock Absorption System
Aluminum Rubber Non-Slip Grip
Handle Bar
Aluminum Rubber Non-Slip Grip
Handle Bar
Aluminum Rubber Non-Slip Grip
Handle Bar
Speed-Sensing Automatic Oil Pump + Manually Adjustable Oil Pump
Oil Pump
Speed-Sensing Automatic Oil Pump + Manually Adjustable Oil Pump
Oil Pump
Speed-Sensing Automatic Oil Pump + Manually Adjustable Oil Pump
Oil Pump
7Tx 0.404
Sprocket type
7Tx 0.404
Sprocket type
7Tx 3/8
Sprocket type
45”/115cm
Max Cutting Diameter
45”/115cm
Max Cutting Diameter
50”/125cm
Max Cutting Diameter
36”,42”
Recommended Guide Bar Size
36”,42”
Recommended Guide Bar Size
28”,36”,42”
Recommended Guide Bar Size
12 Month Consumer / 3 Month Commercial
Warranty
12 Month Consumer / 3 Month Commercial
Warranty
12 Month Consumer / 3 Month Commercial
Warranty
FAQS
Cold Start
- Add fuel (fuel mixing ratio: 25:1).
- Close the choke. If the machine is equipped with a primer bulb, press it 3–5 times until the bulb is filled with fuel.
- Pull the starter rope 3–5 times.
- After hearing two “coughing” sounds,
- Open the choke.
- Pull the starter rope to start the machine.
Hot Start
- Open the choke.
- Pull the starter rope to start the machine.
The issue may be caused by an incorrect fuel mixture, spark plug problems, or a clogged carburetor.
- Check whether the fuel mixing ratio is 25:1. If not, adjust the fuel mixture to 25:1.
- Check whether the fuel line is bent or blocked.
- Check whether the spark plug is sparking properly.
- Check whether the engine is flooded.
- Check whether there is a carburetor malfunction.
- Confirm whether the spark plug is producing a spark: Remove the spark plug, connect it to the ignition coil, and place the spark plug electrode in contact with a metal part of the machine. Pull the starter rope and observe whether the spark plug produces a spark during starting.
- Check the electrode gap. The correct gap is 0.5–0.7 mm (approximately the thickness of a credit card).
- Clean oil residue and debris from the surface of the spark plug.
- If the engine still does not start after completing the above steps, replace the spark plug with a new one.
- Check whether the high-voltage wire (ignition coil lead) is damaged.
- Remove the spark plug.
- Turn the machine upside down.
- Pull the starter rope.
- Drain the excess fuel from the cylinder.
- Remove the air filter.
- Use an air blower to remove dust or debris from the air filter.
- If it cannot be cleaned or has been used for a long time, replace the air filter.








