This is the first fuel-injected chainsaw Husqvarna has sold, and the significance is less about horsepower than about what disappears: no carburetor, no AutoTune learning cycle, no choke routine. Husqvarna's claim is 70cc-class output from a 62.4cc short-stroke engine in a body closer to a 50cc saw, and 5.4 hp at 12.8 lb backs that up — it is lighter than the 562 XP Mark II while making more power. The maker also claims the lowest vibration of any Husqvarna gas saw and 98% dust filtration from the Air Injection pre-cleaner. The practical cautions are the obvious ones for a first-generation system: $1,230 is a $280 premium over the 562 XP Mark II, injection faults are a dealer diagnostic job rather than a roadside carb tweak, and there is not yet a long field record to judge durability against. Early professional press has been strongly positive on power-to-weight and crosscutting.

Best for: Professionals who want 70cc-class power in a 50cc-sized saw and will trade first-generation risk for no carburetor at all.

Specifications

Engine class: 60cc class (by displacement)
Engine: 62.4 cc
Rated power: 4 kW
Bar length: 18 in
Bar range: 15-28 in
Single-pass cut: about 16 in (bar minus 2)
Chain: 3/8" pitch / .058" gauge (X-Cut C85; .050" C83 option)
Weight: 12.8 lb, powerhead only (excl. cutting equipment)
Power type: Gas
Use case: Professional
Warranty: 2-year consumer / 1-year commercial (Husqvarna limited)
Model: 564 XP

Manufacturer figures except the engine class and single-pass cut, which are derived here. What each spec means

Husqvarna's first fuel-injected saw
5.4 hp at 12.8 lb
No choke, no carb tuning

Where it is strong

5.4 hp from 62.4cc at 12.8 lb — more power and less weight than the 562 XP Mark II
Fuel injection removes the choke routine and gives consistent starting hot or cold
Husqvarna rates it the lowest-vibration gas saw it makes, which matters over a full day
Air Injection pre-cleaner removes 98% of incoming dust before the filter
Rated to a 28-inch bar with .058 C85 chain standard
Rear AV damper, captive clutch-cover nuts and raised felling sights are real working-detail upgrades

Where it falls short

$1,230 is a $280 premium over the 562 XP Mark II for roughly 0.7 hp
First-generation injection system with no long-term field record yet
Fuel-system faults mean a dealer with diagnostics — there is no carb to adjust in the field
Still a 60cc-class saw; 36-inch bar work belongs to the 585 or 592 XP

Written from the spec sheet and the maker's documentation; owner reports for this model were too thin to summarize.