The standard operating procedures for using an chainsaw

The standard operating procedures for using an chainsaw

The core of using an chainsaw lies in safety protection, new machine inspection, standard startup, stable cutting, cooling and stopping, and timely maintenance; throughout the process, both hands must be held firmly, protection against rebound, and no high-altitude operations without protective gear are allowed.

I. Safety Protection (Must Wear)

Head: Safety helmet + goggles / face shield (to prevent wood chips from flying).

Ears: Ear protectors / earplugs (noise level approximately 115 dB).

Hands: Anti-slip and cut-resistant gloves.

Feet: Anti-slip safety boots.

Clothing: Tight, well-fitting, and brightly colored clothes to avoid loose clothing getting caught in the chain.

II. Pre-use Inspection and Filling

1. Fuel Ratio (for two-stroke engines)

Domestic machines: Gasoline: Two-stroke engine oil = 25:1

Imported machines: Gasoline: Two-stroke engine oil = 50:1

Gasoline: 90# or above unleaded gasoline; Engine oil: Special two-stroke engine oil.

Filling: Mix oil to the fuel tank; ** Chain oil (special) ** to the chain oil tank, not using waste engine oil.

2. Inspection of the saw's condition

Chain tension: Pull the chain, the tip of the guide plate should be exposed 1–2mm, release the hand and it will automatically rebound; too loose is prone to detachment, too tight is likely to break the chain.

Brake: Push the brake plate forward → chain braking; Pull backward → release braking (must be released before starting).

Air filter, spark plug, guide plate, fixing screws: No looseness, no damage, clean.

3. Working environment

Clear 10 meters of debris, people, pets; Set up a warning area.

Away from power lines (distance > tree height 1.5 times), buildings.

Weather: No rain, wind force < 5; Rainy days / Strong wind days are prohibited to prevent loss of control and electric shock.

III. Startup Steps (Cold Engine)

Placement: Place the saw flat on the ground, the guide plate suspended without touching the ground; Right foot on the rear handle, left hand on the front handle to fix.

Switch: Turn on the power switch (ON); Pull out the choke (cold engine); Press the fuel pump 3–5 times, when the oil pipe has oil, it is ready.

Start: Quickly pull the start rope 3–5 times, hear the "explosion sound" and immediately push back the choke; Lightly pull the start rope again to make the machine run at idle speed.

Preheating: Idle for 3–5 minutes, observe that the chain does not rotate (no follow-up rotation); Lightly press the accelerator, the chain should rotate smoothly, the chain oil should be normally discharged.

Hot Engine Startup: No need to pull the choke, directly press the fuel pump 2 times, pull the start rope to start.

IV. Correct Grip and Cutting Techniques

1. Standard Posture (Anti-Rebound)

Both hands: Right hand holds the rear handle (thumb wraps around), left hand holds the front handle, arms naturally straight.

Posture: Body at a 90° angle to the guide plate, knees slightly bent, weight shifted back; Never operate with one hand.

Danger zone of rebound: The tip of the guide plate (upper 1/3), avoid contact with the wood to cause high-speed rebound.

2. Cutting Method

Small diameter (< 10cm): The guide plate is at a 30° angle to the wood, use the weight of the saw to cut slowly, do not forcibly press.

Large diameter (> 10cm): First cut 1/3 (release opening) → then cut through, prevent the saw from clamping and splitting.

Thick branches: First cut the opening → then cut through the opening, segmental cutting; Prevent the branch from suddenly breaking and getting caught in the chain.

Logging: First cut the opening (accounting for 1/3 of the diameter) → then cut the upper opening (slightly higher than the lower opening), control the direction of the fall; Never stand in the direction of the tree's fall.

V. Shutdown and Completion

Cool the body for 1 minute at idle speed.

Turn off ** power switch (OFF) ** and extinguish the fire.

Cleaning: Remove wood chips, oil stains from the guide plate, chain, air filter; Check chain wear, lubricate in time.

Storage: Empty fuel, place in a dry and ventilated place; Chain can be removed and immersed in oil for rust prevention.

VI. Safety Red Lines (Absolutely Prohibited)

❌ Operating with one hand, high-altitude (above the shoulders) without protective gear.

❌ The tip of the guide plate touches the wood (anti-rebound).

❌ Chain without oil / running at high speed without oil. ❌ Rainy weather, strong wind (≥5 levels), after drinking alcohol, fatigued operation.

❌ Before maintenance/checking, engine not turned off, spark plug cap not removed.

Common Fault Quick Resolution

Starting difficulty: ① Incorrect throttle position; ② Incorrect fuel ratio / fuel deterioration; ③ Carbon buildup on spark plugs / cylinder blockage; ④ Air filter clogged.

Chain not rotating: ① Brakes not released; ② Chain too tight and stuck; ③ Clutch worn out.

Clamping saw: ① Incorrect cutting sequence; ② Excessive wood stress; Immediately stop the machine, use a wedge to open the cut and then slowly withdraw.