Husqvarna 450 Rancher Gas Chainsaw 20 in

Chain Length: 20 inches
Horsepower: 3.2 hp
Power Source: Gas
Item Weight: 11.3 pounds

Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.

Our verdict

A 20 inch, 50.2cc gas chainsaw built for firewood and heavier yard work, with Smart Start and an inertia chain brake as its notable safety and convenience features.

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ASIN: B0BRNRXWJBModel: 450 RancherCategory: Chainsaws

Sizes Available

450450S450X

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Overview

A 20 inch gas chainsaw powered by a 50.2cc, 3.2 HP X-Torq engine, built for bar lengths between 13 and 20 inches. It includes Smart Start for easier pull-starts, an inertia-activated chain brake, and a centrifugal air cleaning system ahead of the air filter.

This sits above the battery mini-saws in this category by design: a 50.2cc gas engine and a 20 inch bar are built for firewood cutting and larger tree work, not small-branch pruning. X-Torq is Husqvarna's engine technology aimed at lower fuel consumption and emissions without sacrificing power, and the air injection system is meant to extend intervals between air filter cleanings by filtering out larger debris first.

20 in bar length
50.2cc, 3.2 HP X-Torq engine
Smart Start pull-start system
Inertia-activated chain brake

Who it's for

Suits anyone doing firewood cutting, yard cleanup or tree pruning that requires more power and bar length than a battery mini-chainsaw offers. Overkill for occasional light pruning of small branches, where a smaller electric saw would be lighter and simpler.

Pros and cons

Pros

50.2cc, 3.2 HP engine suited to firewood and larger limbs
Smart Start reduces pull-start effort
Inertia-activated chain brake for kickback protection
Centrifugal air cleaning extends air filter life

Cons

Gas engine requires fuel mixing and more maintenance than a battery saw
Heavier than needed for light pruning

Performance notes

The X-Torq engine design is aimed at pulling more work from the same fuel while running cleaner than a standard 2-cycle engine, and Smart Start reduces the pull force needed to get it running. The centrifugal air cleaning system filters larger dust and debris out before it reaches the air filter, which should stretch the interval between filter cleanings. The inertia-activated chain brake is a kickback safety feature that engages from the bar's own momentum rather than requiring the operator to react in time.

Where it stands among chainsaws

#1 most-searched brand and model of the 13 chainsaws lines we track (by search demand, not sales).

From the specs of the 19 chainsaws we list; not a test result.

Specifications

Dimensions & fit
Brand	Husqvarna
Model	450 Rancher
Chain Length	20 inches
Item Weight	11.3 pounds
Item Dimensions L x W x H	16 × 8.9 × 11.5 inches
Power & efficiency
Horsepower	3.2 hp
Power Source	Gas
Included components
Unit Count	1
Included Components	Gas Chainsaw, Owners Manual
Warranty & support
Manufacturer Warranty Description	2 years
Other details
Number of Items	1
Item Type Name	Gas Chainsaw