Overview
Description
Best-in-Class Cutting Capacity
The second generation of the Husqvarna 545 is a powerful 50cc chainsaw built for felling, limbing,
and bucking small to mid-size trees. Designed for professional forestry and tree care crews, this
durable saw features increased power and a slimmed-down design for improved handling.
A wide range of innovative features ensures efficient, comfortable operation season after season.
Features
- Excellent Cooling Capacity: Optimized cooling system improves reliability and extends engine life in all conditions.
- AutoTune™: Automatically adjusts engine settings for optimal performance—no carburetor adjustments needed.
- Magnesium Crankcase: Built to withstand high RPMs and demanding professional use for long service life.
- Smart Start® Technology: Engine and starter system designed for quick, easy starting with minimal effort.
- Snap-Lock Cylinder Cover: Quick access for spark plug changes and cleaning.
- Fuel Indicator: Transparent window makes it easy to monitor fuel levels.
- Retained Bar Nuts: Prevents loss of bar nuts during maintenance.
- Quick-Release Air Filter: Fast and easy removal for cleaning or replacement.
- Retained Starter Screws: Prevents accidental loss during service.
- Flip-Up Fuel Cap: Easy to open and secure—even with gloves.
- LowVib® Technology: Reduces vibration for improved operator comfort.
- Permanent Felling Sight: Molded-in sight ensures long-term cutting accuracy.
- Air Injection™ Technology: Removes larger debris before it reaches the filter, extending engine life.
- Adjustable Oil Pump: Allows you to control oil flow based on conditions.
- Easy Starting System: Combined start/stop switch and fuel pump simplify operation.
- Side-Mounted Chain Tensioner: Provides easier access for quick chain adjustments.
- Slimmed-Down Design: Low-profile body improves maneuverability and handling.
- X-TORQ® Engine: Delivers high power and torque with efficient fuel consumption.
- Three-Piece Crankshaft: Forged construction ensures maximum durability.
Specifications
Engine
- Chain Speed (Max Power): 62.7 ft/s
- Displacement: 50.1 cc
- Power Output: 3.6 hp
- Max Torque: 2.95 Nm @ 7,200 rpm
- Clutch Engagement Speed: 3,900 rpm
- Max Power Speed: 9,900 rpm
- Idle Speed: 2,800 rpm
- Electrode Gap: 0.02 in
- Ignition Module Air Gap: 0.01 in
- Oil Pump Type: Adjustable flow, no flow at idle
- Spark Plug: NGK CMR6H
Cutting Equipment
- Recommended Bar Length (Min): 13 in
- Recommended Bar Length (Max): 20 in
- Standard Bar Length: 16 in (40 cm)
- Chain Pitch: .325″
- Gauge: .058″
- Chain Type: S35G
- Sprocket Type: Rim 7
Dimensions & Weight
- Weight (Excl. Cutting Equipment): 11.7 lb
Sound & Noise
- Sound Pressure (Operator’s Ear): 106 dB(A)
- Sound Power (Guaranteed): 115 dB(A)
- Sound Power (Measured): 113 dB(A)
Vibration
- Rear Handle: 4.6 m/s²
- Front Handle: 4.0 m/s²
Lubrication & Fuel
- Oil Tank Volume: 0.68 US pint
- Fuel Mix: Husqvarna 2-stroke oil or equivalent at 50:1
Emissions
- CO₂ Emissions (EU V): 844 g/kWh