Husqvarna 55 Chainsaw User Manual

The Husqvarna 55 is a professional-grade chainsaw featuring a 50.1cc engine, automatic chain oiling, combined choke/stop control, inertia-activated chain brake, anti-vibration system, and quick-release air filter. Designed for demanding forestry and tree care work, it offers reliable power, ergonomic handling, and enhanced safety features. 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. Safe Operation Procedures 7. Maintenance Schedule 8. Chain & Bar Care 9. Storage Guidelines 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: 50.1cc X-Torq engine, 16" or 18" guide bar, automatic chain oiler, inertia chain brake, combined choke/stop control, anti-vibration system, side-mounted chain tensioner, quick-release air filter.

FeatureDescription
Engine50.1cc X-Torq engine for reduced emissions and fuel consumption
Guide BarStandard 16" or optional 18" Oregon-style bar
Chain OilerAutomatic with manual override for increased oil flow
Chain BrakeInertia-activated for kickback protection
Air FilterQuick-release for easy cleaning
Anti-VibrationLow-vibration handles for operator comfort
StarterEasy-start system with decompression valve
Fuel Tank0.55 US gal (2.1 L) capacity
Oil Tank0.26 US gal (1.0 L) capacity
Weight12.8 lbs (5.8 kg) without bar and chain

Assembly & Preparation

Unpack and inspect contents. Assemble on a clean, flat surface.

  1. Attach guide bar and chain: Place bar on studs, loop chain over sprocket, adjust tension with side screw.
  2. Fill fuel tank: Use fresh 50:1 gasoline/oil mix (2-stroke oil).
  3. Fill chain oil tank: Use Husqvarna chain oil or equivalent.
  4. Check chain brake: Ensure brake band moves freely and engages properly.

WARNING! Always wear protective gear: helmet, gloves, eye protection, hearing protection, chainsaw chaps, and steel-toe boots.

First-Time Operation

Perform pre-start checks before each use.

  1. Check chain tension: Chain should be snug but pull freely around bar.
  2. Test chain brake: Engage brake by pushing handle forward; it should lock chain.
  3. Start engine: Place on ground, engage chain brake, set choke, pull starter cord.
  4. Warm up: Allow engine to idle for 30 seconds before cutting.

CAUTION! Never start chainsaw in enclosed area. Carbon monoxide can kill.

Specifications

Controls and Functions

Main controls located on top and rear handle. Front Handle: Chain brake lever, throttle trigger lockout. Rear Handle: Throttle trigger, stop switch, choke control, decompression valve.

Operation: Throttle trigger lockout must be depressed before throttle can be engaged. Chain brake engages automatically during kickback or manually by pushing handle forward. Combined choke/stop control: Pull out for choke, push in for stop.

Adjustments: Chain tension via side screw. Carburetor adjustment screws (H, L, T) under cover (professional service recommended).

Safe Operation Procedures

Always maintain secure footing and grip. Plan escape path from falling trees.

  1. Start only on ground or log with chain brake engaged.
  2. Hold saw firmly: Right hand on rear handle, left on front.
  3. Cut at full throttle; never cut with tip of bar.
  4. Be aware of kickback zone (upper quadrant of bar tip).
  5. Shut off engine when carrying more than few steps.

Tip: Keep bystanders at least 20 feet away during operation.

Maintenance Schedule

Daily: Clean air filter, check chain tension, inspect chain sharpness. Weekly: Clean cooling fins, check spark plug, clean fuel filter. Monthly: Clean carburetor air intake, check anti-vibration mounts, inspect bar for wear.

  1. Air filter: Remove, clean with soapy water, dry completely.
  2. Spark plug: Clean electrode, gap 0.020" (0.5 mm).
  3. Fuel filter: Replace every 3 months or when clogged.
  4. Chain brake: Test function daily; replace band if worn.

WARNING! Always disconnect spark plug wire before performing maintenance.

Chain & Bar Care

Proper maintenance extends life of cutting components.

  1. Sharpening: Use round file (7/32" or 5.5 mm) at 30° angle.
  2. Depth gauges: File to 0.025" (0.65 mm) below cutter.
  3. Bar maintenance: Clean groove weekly, flip bar monthly for even wear.
  4. Chain lubrication: Check oil flow daily; adjust manual override as needed.

CAUTION! Dull chain causes kickback. Always cut with sharp chain.

Storage Guidelines

Prepare chainsaw for storage if not used for 30+ days.

  1. Drain fuel tank and run engine until it stops.
  2. Remove chain, clean, and soak in oil.
  3. Clean entire saw, especially cooling fins and air filter.
  4. Store in dry place, cover to prevent dust accumulation.

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

Regulatory Information

EPA Certified: Meets EPA Phase 2 emissions standards. CARB Certified: Complies with California Air Resources Board requirements. EU Type Approval: Meets European noise and vibration directives. Copyright © Husqvarna AB. All rights reserved. For support, visit www.husqvarna.com or contact 1-800-487-5952.

Troubleshooting

SymptomPossible CauseCorrective Action
Engine won't startFuel, spark, airCheck fuel mix, spark plug, air filter; use choke properly.
Engine runs poorlyCarburetor, filterClean air filter; check fuel filter; adjust carburetor (H/L screws).
Chain doesn't oilOil tank, passagesFill oil tank; clean oil passages; check pump function.
Chain comes looseTension, bar wearRetension chain; check bar for wear; replace if grooved.
Excessive vibrationMounts, balanceCheck anti-vibration mounts; ensure chain is balanced and sharp.

Reset: For electronic ignition models, disconnect spark plug wire for 30 seconds to reset.

Service: 1-800-487-5952; www.husqvarna.com

Husqvarna 55 Chainsaw User Manual © - All Rights Reserved 2025