
Key Features
72cc Full Crank Engine 3.7kW 4.9HP Hardwood Felling
Safety Assurance
32 Inch/80cm Max Cut Professional Logging
Upgrade Highlights
Dual-arm Brake System
Dual-arm brake system with enlarged guard brake surface for quick stopping and enhanced safety.
Upgraded Extended Guide Bar & Professional Cutting Configuration
Compatible with 25/28-inch extended guide bars, matched with 12.1mm tail mount and 3/8" low-kickback chain for higher cutting efficiency and ideal for large-diameter logging tasks.
Speed-Automatic Oil Pump
The speed-automatic oil pump delivers adaptive chain lubrication in real time, ensuring smooth operation with reduced friction and effective overheat protection. It maintains optimal cutting performance and greatly extends the service life of the chain and guide bar.
Upgraded Magnesium Alloy Construction
The crankcase, starter and side cover adopt magnesium alloy instead of aluminum alloy and ordinary plastic, featuring high impact resistance, fast heat dissipation and great rigidity for a sturdy and durable whole machine.
Product Comparison
Discover More Differencewith Cutting Attachment
with Cutting Attachment
with Cutting Attachment
at Idle Speed
at Idle Speed
at Idle Speed
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.






