Husqvarna 240 38cc Manual

The Husqvarna 240 is a lightweight, professional-grade chainsaw featuring a 38cc X-Torq® engine for reduced fuel consumption and emissions, Smart Start® for easy starting, LowVib® anti-vibration system, combined choke/stop control, air injection centrifugal air cleaning, inertia activated chain brake, and side-mounted chain tensioning. Below are key sections for safety, features, assembly, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Assembly & Preparation 3. First-Time Operation 4. Specifications 5. Controls and Functions 6. Chain & Bar Maintenance 7. Engine Operation 8. Safety Features 10. Care & Storage 11. Regulatory Information 12. Troubleshooting

Features at a Glance

Key components: 38cc X-Torq® engine, guide bar, saw chain, chain brake, combined choke/stop control, air filter, fuel tank, oil tank, and front hand guard.

Feature	Description
X-Torq® Engine	Reduces fuel consumption and exhaust emissions
Smart Start®	Easy starting system with decompression valve
LowVib®	Anti-vibration system for reduced operator fatigue
Air Injection®	Centrifugal air cleaning for longer air filter life
Combined choke/stop control	Simplified starting procedure
Inertia activated chain brake	Automatic kickback protection
Side-mounted chain tensioner	Easy chain adjustment without tools
Front hand guard	Protects hands from debris and chain
Transparent fuel tank	Easy fuel level monitoring
Quick-release air filter	Easy access for cleaning

Assembly & Preparation

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

Attach guide bar and chain: Place bar on mounting studs, fit chain around sprocket and bar groove, adjust tension.
Fill fuel tank: Use fresh, high-quality gasoline mixed with 2-stroke oil (50:1 ratio).
Fill chain oil tank: Use Husqvarna chain oil or equivalent.
Check chain brake: Ensure brake band is disengaged before starting.

WARNING! Always wear appropriate PPE: helmet, eye protection, hearing protection, gloves, and chainsaw chaps. Ensure chain brake functions properly before use.

First-Time Operation

Perform pre-start checks before initial use.

Check chain tension: Chain should be snug against bar but pull freely.
Check chain sharpness: Ensure cutting teeth are sharp and properly filed.
Start engine: Place on ground, engage chain brake, set choke, pull starter cord.
Warm up: Allow engine to idle for 30 seconds before cutting.

CAUTION! Never start the chainsaw in a closed area. Ensure firm footing and clear work area of obstacles.

Specifications

Engine Displacement: 38cc (2.3 cu. in.)
Power Output: 1.8 kW (2.4 hp)
Fuel Tank Volume: 0.33 L (11.2 fl. oz.)
Oil Tank Volume: 0.25 L (8.5 fl. oz.)
Recommended Bar Length: 40 cm (16 in.)
Chain Pitch: 3/8" Low Profile
Chain Gauge: 0.050" (1.3 mm)
Weight (excl. cutting equipment): 4.4 kg (9.7 lbs)
Sound Power Level: 112 dB(A)
Vibration Levels: Front handle: 3.5 m/s², Rear handle: 4.5 m/s²

Controls and Functions

Main controls: Throttle trigger, throttle trigger lockout, stop switch, choke control, chain brake, and decompression valve.

Operation: Throttle trigger controls engine speed; lockout prevents accidental activation. Stop switch stops engine. Choke control enriches fuel mixture for cold starts. Chain brake stops chain rotation during kickback. Decompression valve reduces cylinder pressure for easier starting.

Maintenance: Chain tension adjustment, air filter access, spark plug access, fuel/oil caps. Safety: Chain brake activation, front hand guard, right-hand guard.

Chain & Bar Maintenance

Regular maintenance ensures optimal cutting performance and safety.

Chain sharpening: File cutting teeth at 30° angle, maintain depth gauge clearance.
Chain tension: Adjust when chain sags from bar rails; chain should snap back when pulled.
Bar maintenance: Clean bar groove, flip bar regularly for even wear.
Lubrication: Ensure automatic oiler is functioning; check oil flow before cutting.

Tip: Always stop engine and engage chain brake before performing maintenance.

Engine Operation

Starting procedure for cold and warm engines.

Cold start: Engage chain brake, set choke, press decompression valve, pull starter cord until engine fires, disengage choke, pull to start.
Warm start: Engage chain brake, set to run position, pull starter cord.
Stopping: Release throttle, press stop switch.
Fuel mix: Always use fresh gasoline (min. 89 octane) with Husqvarna 2-stroke oil at 50:1 ratio.

WARNING! Never run engine indoors. Avoid inhaling exhaust fumes. Store fuel in approved containers away from heat sources.

Safety Features

Chain Brake: Inertia activated; stops chain within milliseconds during kickback. Throttle Trigger Lockout: Prevents accidental throttle activation. Right-Hand Guard: Protects hand from broken chain. Front Hand Guard: Deflects debris and provides additional protection.

Care & Storage

Clean chainsaw after each use. Empty fuel tank for long-term storage. Store in dry, secure location.

CAUTION! Never use pressure washer for cleaning. Always empty fuel tank before storing for more than 30 days. Use fuel stabilizer if storing with fuel.

Regulatory Information

EPA and CARB certified for emissions compliance. Meets ANSI B175.1 safety standards. Contains components that may be hazardous if disposed improperly. For support, visit www.husqvarna.com or contact Husqvarna Customer Support at 1-800-487-5962.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	Fuel, spark, air	Check fuel mix, spark plug, air filter; ensure choke set correctly.
Engine runs poorly	Clogged filter, carburetor	Clean air filter; check fuel filter; adjust carburetor if necessary.
Chain doesn't turn	Brake engaged, clutch, sprocket	Disengage chain brake; check clutch and drive sprocket for wear.
Excessive vibration	Loose components, chain imbalance	Tighten all bolts; check chain for damage or uneven wear.
Chain throws oil	Over-oiling, wrong oil	Adjust oil pump; use correct chain oil viscosity.

Service: For major repairs, contact authorized Husqvarna service dealer.

Support: 1-800-487-5962; www.husqvarna.com