Husqvarna 445S 18-Inch 50.2cc Gas Chainsaw vs Husqvarna 450X Rancher 20-Inch 50.2cc Gas Chainsaw with AutoTune
These are side-by-side facts taken from each product guide: published specifications, strengths and caveats as their sources state them. This page is not a test, a ranking or a verdict about which model is better.
Husqvarna 445S 18-Inch 50.2cc Gas Chainsaw
Homeowners who want an 18-inch gas saw that can step up to a 20-inch bar
The 445S has a 50.2 cc, 3 hp X-Torq engine and ships with an 18-inch sprocket-nose bar and SP33G chain, with a recommended range up to 20 inches. Husqvarna lists 11 pounds before bar and chain. The listing's article number matches the maker's page, and the five-year warranty needs a fuel purchase plus online registration.
Published specifications
- Article 970709038 (maker 970 70 90-38), 18 in .325 .050
- 50.2 cc; 3 hp net (ISO 7293); max power at 9,000 rpm
- Bars 13-20 in; SP33G X-Cut chain; Spur 7 sprocket
- 11 lb excluding bar and chain (maker); 14.3 lb (listing)
- Automatic oil pump; chain-oil tank 0.55 US pint
- 2-year residential warranty; up to 5 years with fuel purchase and registration
Strengths
- Listing article number matches Husqvarna's product page
- Accepts bars up to 20 inches, beyond the supplied 18-inch
- Fuel indicator, flip-up cap and retained bar nut
Caveats
- Five-year warranty needs fuel bought with the saw plus online registration
- Amazon's 14.3 lb weight does not match the maker's 11 lb
- No operator's manual attached to the listing
Read the full Husqvarna 445S 18-Inch 50.2cc Gas Chainsaw guide
Husqvarna 450X Rancher 20-Inch 50.2cc Gas Chainsaw with AutoTune
Homeowners who want a 20-inch gas saw with automatic engine adjustment
The 450X Rancher pairs a 50.2 cc, 3.4 hp X-Torq engine with AutoTune, which Husqvarna says adjusts engine settings automatically. It ships with a 20-inch bar and SP33G chain and weighs 11.2 pounds before bar and chain. Two maker spec entries need checking with a dealer, and the five-year warranty needs qualifying fuel plus registration.
Published specifications
- Article 970702450 (maker 970 70 24-50), 20 in .325 .050
- 50.2 cc; 3.4 hp net (ISO 7293); AutoTune engine management
- Bars 13-20 in; SP33G X-Cut chain; Spur 7 sprocket
- 11.2 lb excluding bar and chain (maker); 14.9 lb (listing)
- 106 dB(A) at ear; vibration 3.9 front / 4.1 rear m/s2
- 2-year residential warranty; up to 5 years with fuel purchase and registration
Strengths
- AutoTune adjusts engine settings automatically, per Husqvarna
- Listing article number matches Husqvarna's product page
- Maker credits a simple starting interface for easier starts
Caveats
- Maker table lists 96,000 rpm and a 55 US pint oil tank; query both
- Amazon's 14.9 lb weight does not match the maker's 11.2 lb
- Fuel quantity for the warranty extension is not stated on the page
Read the full Husqvarna 450X Rancher 20-Inch 50.2cc Gas Chainsaw with AutoTune guide
How to choose between them
Choose the Husqvarna 445S 18-Inch 50.2cc Gas Chainsaw if your situation matches: Homeowners who want an 18-inch gas saw that can step up to a 20-inch bar. Its main caveat: Five-year warranty needs fuel bought with the saw plus online registration.
Choose the Husqvarna 450X Rancher 20-Inch 50.2cc Gas Chainsaw with AutoTune if your situation matches: Homeowners who want a 20-inch gas saw with automatic engine adjustment. Its main caveat: Maker table lists 96,000 rpm and a 55 US pint oil tank; query both.
Both entries repeat what each guide records. Confirm the model, included parts and availability on the current listing before ordering.
Primary sources
- Husqvarna US product page for the 445S, article 970 70 90-38, with specifications and FAQ Source for Husqvarna 445S 18-Inch 50.2cc Gas Chainsaw
- Husqvarna 2026 limited warranty document supplied with the listing Source for Husqvarna 445S 18-Inch 50.2cc Gas Chainsaw and Husqvarna 450X Rancher 20-Inch 50.2cc Gas Chainsaw with AutoTune
- Husqvarna US product page for the 450X Rancher, article 970 70 24-50, with specifications and FAQ Source for Husqvarna 450X Rancher 20-Inch 50.2cc Gas Chainsaw with AutoTune
Primary sources checked .