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Husqvarna FS400 Specs

by Blades Admin

Husqvarna FS400 Specs: Complete Technical Breakdown of the FS 400 LV Walk-Behind Floor Saw

If you’re searching for Husqvarna FS400 specs, you’re almost always looking for the Husqvarna FS 400 LV push-style floor saw—the compact, jobsite-tough walk-behind saw built for accurate cutting in concrete and asphalt. It’s a popular choice for small road repair, patch work, sidewalks, and utility cuts because it balances cutting capacity with easy transport and predictable handling.

Below is a clear, spec-focused guide that explains what the FS400 is, the numbers that matter, and what those numbers mean in real-world cutting.

What the Husqvarna FS400 Is Built For

The FS 400 LV is designed for flat sawing—straight, controlled cuts on horizontal surfaces. Husqvarna positions it as an all-round petrol push floor saw with features that support better alignment and stability, including an adjustable handle, stable weight distribution, and an integrated water system for wet cutting.

Typical jobs where the FS400 platform shines:

  • Small road repair in asphalt or concrete

  • Sidewalk and curb cuts

  • Slab sections and patch boundaries

  • Shallow-to-mid depth trench access lines

  • Expansion/control joint work (depending on local spec)

Top FS400 Specs at a Glance

Here are the headline specs most contractors care about first—power, blade size, and depth:

  • Engine power (rated by engine manufacturer): 11.7 hp (US listing)

  • Max blade diameter: 20 in (US listing)

  • Max cutting depth: 7.5 in (US listing)

On the technical-data side, Husqvarna also documents multiple blade/depth configurations (commonly 18" and 20" setups) and the matching max depths: 18 in (450 mm) = 6.5 in (162 mm) and 20 in (500 mm) = 7.5 in (187 mm).

Cutting System Specs

Maximum Blade Size (Diameter)

The FS400 platform supports:

  • 18 in (450 mm) max blade (common configuration)

  • 20 in (500 mm) max blade (higher depth configuration)

Why it matters: Blade diameter directly impacts cutting depth and often influences blade selection and inventory (especially if you keep separate blades for asphalt vs concrete).

Maximum Cutting Depth

The technical data lists two primary max-depth figures depending on blade size:

  • 6.5 in (162 mm) (with an 18 in / 450 mm blade)

  • 7.5 in (187 mm) (with a 20 in / 500 mm blade)

Why it matters: If your work routinely requires going beyond 6" (heavy patch removal, deeper asphalt lifts, thicker slabs), that extra inch can be the difference between a single pass strategy and switching equipment.

Spindle Speed (Blade Shaft Speed)

  • Spindle rotation speed: 3000 rpm (listed at engine speed 3700 rpm)

Why it matters: Blade RPM affects cutting speed, blade stability, and—most importantly—safety. You always want a blade rated at or above the saw’s operating RPM.

Arbor Size and Flange Diameter

  • Arbor size: 1 in (25.4 mm)

  • Blade flange diameter: 3.5 in (89 mm)

Why it matters: Arbor size needs to match your blades (or you’ll need bushings/adapters). Flange diameter influences clamping stability—important when you’re running larger diameter blades or cutting abrasive materials.

Weight Specs (Transport vs Operating)

Husqvarna documents weight in two practical ways: the saw with empty tanks and the typical operating weight.

  • Machine with empty tanks: 229 lb (104 kg) or 236 lb (107 kg) (variant-dependent)

  • Operating weight: 298 lb (135 kg) or 320 lb (145 kg) (variant-dependent)

Why it matters:

  • Empty-tank weight affects loading/unloading and trailer ramps.

  • Operating weight affects stability, traction, and how the saw tracks during long cuts. More operating weight often improves stability—but can feel heavier to maneuver on delicate surfaces.

Dimensions (Footprint and Jobsite Fit)

Two dimension sets are listed (variant-dependent):

  • 48.0 × 23.6 × 39.4 in (1220 × 600 × 1000 mm)

  • 38.1 × 24.2 × 39.7 in (970 × 615 × 1010 mm)

Why it matters: These measurements help you confirm:

  • It will fit in your truck bed/trailer space

  • You can navigate the jobsite (tight sidewalks, interior slabs, narrow approaches)

  • Storage and shop footprint planning

Noise and Vibration Specs (What Operators Feel)

Husqvarna includes noise and handle vibration values in the technical data:

Noise Emissions

  • Sound power level (measured): 109 dB(A)

  • Sound power level (guaranteed): 112 dB(A)

  • Sound pressure at operator’s ear: 94 dB(A)

Vibration Levels (Handle)

  • Right handle: 2.5 m/s²

  • Left handle: 3.2 m/s²

Why it matters: These numbers are a big deal for crew comfort and compliance. Even if you’re “used to loud,” the FS400 category is absolutely hearing-protection territory.

Key Jobsite Features Tied to the Specs

The FS 400 LV isn’t only about raw numbers—its features connect directly to performance in the field:

  • Stable weight distribution supports straight-line tracking and reduces drift on long cuts.

  • Integrated water system supports wet cutting, helps manage dust, and cools the blade during extended runs.

  • Clear depth indicator helps repeat cuts to spec and calibrates for different blade diameters.

  • Retractable handwheel is a practical durability feature for transport and repositioning.

Choosing Between 18" vs 20" Setup on the FS400 Platform

A quick rule of thumb:

  • Choose 18" (450 mm) if most of your work is around 6" depth or less, and you want common blade availability and slightly easier handling.

  • Choose 20" (500 mm) if you regularly need the full 7.5" (187 mm) cutting depth, or you want extra depth margin for slab thickness variations.

FAQs: Husqvarna FS400 Specs

Is “Husqvarna FS400” the same as FS 400 LV?
In most listings and searches, yes—the specs people want are the FS 400 LV floor saw specs.

What is the max cutting depth of the Husqvarna FS400?
It depends on blade size. The technical data lists 6.5 in (162 mm) with an 18" blade and 7.5 in (187 mm) with a 20" blade.

What blade size does the FS400 take?
The maximum blade size listed is 18 in (450 mm) and 20 in (500 mm) depending on configuration.

What is the arbor size on the Husqvarna FS400?
The arbor size is 1 in (25.4 mm).

What RPM does the blade shaft run on the FS400?
Husqvarna lists 3000 rpm spindle speed (noted at engine speed 3700 rpm).

How much does the FS400 weigh?
Husqvarna lists 229–236 lb (104–107 kg) with empty tanks (variant-dependent) and 298–320 lb (135–145 kg) operating weight (variant-dependent).

How big is the FS400 (dimensions)?
Two dimension sets are listed depending on variant: 48.0 × 23.6 × 39.4 in and 38.1 × 24.2 × 39.7 in.

How loud is the Husqvarna FS400?
The technical data lists 94 dB(A) sound pressure at the operator’s ear and up to 112 dB(A) guaranteed sound power level.

Does the FS400 support wet cutting?
Yes—Husqvarna highlights an integrated water setup among the core features.

What’s the listed engine power on the US FS 400 LV page?
The US product listing shows 11.7 hp as rated by the engine manufacturer.

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