310 Chainsaw Manual

The 310 Chainsaw is a professional-grade chainsaw designed for heavy-duty cutting tasks, featuring a 50cc engine, 18-inch guide bar, automatic chain oiling system, anti-vibration handles, chain brake safety feature, easy-start system, and low-emission technology. Below are key sections for safety, features, assembly, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: 50cc 2-stroke engine, 18-inch guide bar, automatic oiler, chain brake, decompression valve, anti-vibration system, quick-stop chain brake.

Feature	Description
Engine displacement	50cc 2-stroke air-cooled engine
Guide bar length	18 inches (45 cm)
Chain pitch	3/8 inch
Automatic oiler	Lubricates chain during operation
Chain brake	Stops chain instantly upon kickback
Anti-vibration system	Reduces operator fatigue
Decompression valve	Easier starting
Fuel capacity	0.55 liters (18.6 oz)
Oil capacity	0.26 liters (8.8 oz)
Weight (without bar/chain)	5.2 kg (11.5 lbs)

Assembly & Setup

Unpack and inspect all components. Assemble on clean, flat surface.

1. Attach guide bar: Loosen bar nuts, position bar on studs, align chain sprocket.
2. Install chain: Place chain on bar with cutting teeth facing forward, adjust tension.
3. Fill fuel tank: Mix gasoline with 2-stroke oil at 50:1 ratio.
4. Fill oil tank: Use bar and chain oil only.
5. Check controls: Ensure throttle trigger, chain brake, and safety switch function properly.

WARNING! Always wear protective gear during assembly. Keep hands away from sharp chain.

Safety Instructions

Read all safety instructions before operation.

1. Personal protective equipment: Always wear safety glasses, hearing protection, gloves, chainsaw chaps, and steel-toe boots.
2. Clear work area: Remove obstacles, ensure secure footing, keep bystanders at least 15 feet away.
3. Pre-operation check: Verify chain tension, sharpness, and lubrication before each use.
4. Starting safety: Place on ground, engage chain brake, hold front handle with left hand, pull starter with right.
5. Cutting safety: Never cut above shoulder height, avoid kickback zone (upper tip of bar).

CAUTION! Chainsaw kickback can cause serious injury. Always maintain firm grip and proper stance.

Specifications

• Engine Type: 2-stroke, single cylinder, air-cooled.
• Displacement: 50cc.
• Power Output: 2.8 kW (3.8 hp) at 9,000 RPM.
• Fuel: Unleaded gasoline (minimum 89 octane) mixed with 2-stroke oil (50:1).
• Bar Length: 18 inches (45 cm).
• Chain Speed: 20 m/s at maximum RPM.
• Sound Level: 105 dB(A) at operator's ear.
• Vibration Level: 4.5 m/s² front handle, 5.2 m/s² rear handle.
• Warranty: 2 years commercial use, 5 years private use.

Controls and Components

Main controls: Front handle with chain brake, rear handle with throttle trigger, master control lever, decompression valve, choke control, primer bulb.

Safety features: Chain brake (manual/inertial), throttle trigger lockout, right-hand guard, chain catcher, spark arrestor muffler.

Maintenance points: Air filter cover, spark plug, fuel filter, oil pump adjustment, chain tensioning screw.

Starting Procedure

Cold start procedure:

1. Place chainsaw on flat ground, clear of debris.
2. Engage chain brake by pushing forward on front handle guard.
3. Set master control lever to choke position (full down).
4. Press primer bulb 5-6 times until fuel is visible.
5. Pull starter rope slowly until resistance is felt, then pull briskly.
6. When engine fires, move master control to half-throttle position.
7. Pull starter rope again until engine starts.
8. Disengage chain brake before cutting.

Tip: For warm starts, skip choke and primer steps.

Cutting Techniques

Basic cutting methods:

1. Felling: Plan escape path, make notch cut (1/3 tree diameter), then felling cut (2 inches above notch).
2. Limbing: Work from trunk outward, cut downward on top of log, avoid pinching.
3. Bucking: Support log properly, cut from top down, use wedges for pinched saw.
4. Pruning: Cut small branches with pulling chain (bottom of bar), larger branches with standard cutting.

WARNING! Never cut with tip of bar to avoid kickback. Always maintain secure footing.

Maintenance Schedule

Daily (before each use): Check chain tension and sharpness, inspect bar for wear, check oil level, clean air filter, verify safety features.

Weekly: Clean spark arrestor screen, check fuel filter, inspect anti-vibration elements, tighten all fasteners.

Monthly: Replace spark plug, clean carburetor air filter, check clutch and sprocket, lubricate bar tip sprocket.

Seasonally: Replace fuel filter, clean combustion chamber, check piston and cylinder, replace worn bar/chain.

Chain Sharpening

Tools needed: Round file (4.0 mm), file guide, depth gauge tool.

1. Secure bar: Clamp bar in vise or use bar holder.
2. File angle: Maintain 30° filing angle, follow existing angle on cutters.
3. File direction: Push file forward in smooth strokes, rotate file slightly.
4. Equal strokes: Apply same number of strokes to each cutter.
5. Depth gauges: File depth gauges to 0.65 mm below cutter height.
6. Check symmetry: Ensure left and right cutters are equally sharp.

CAUTION! Always wear gloves when handling chain. File in one direction only.

Storage Guidelines

Long-term storage preparation:

1. Drain fuel tank and run engine until carburetor is empty.
2. Remove chain, clean in solvent, coat with oil and store separately.
3. Clean entire saw, especially cooling fins and air filter.
4. Remove spark plug, add teaspoon of oil to cylinder, pull starter slowly to distribute.
5. Store in dry place, cover with breathable cloth.

CAUTION! Never store with fuel in tank. Fuel deteriorates and can damage carburetor.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	No spark/flooded/old fuel	Check spark plug; wait if flooded; replace fuel mix.
Engine runs then dies	Clogged fuel filter/air filter	Replace fuel filter; clean air filter.
Chain doesn't turn	Brake engaged/clutch worn	Disengage chain brake; inspect clutch assembly.
Chain throws oil	Over-oiling/incorrect oil	Adjust oil pump; use proper bar and chain oil.
Excessive vibration	Loose components/worn AV mounts	Tighten all fasteners; replace anti-vibration mounts.
Poor cutting performance	Dull chain/incorrect tension	Sharpen chain; adjust tension to 2-3 mm pull.

Service: Authorized service centers only. Contact manufacturer for dealer locations.

Support: 1-800-555-CHAIN; www.310chainsaw.com