HUSQVARNA FS 400, 20" Flat Saw -  967796502

NOTE: BLADE ON SAWS IN PICTURE ARE NOT INCLUDED : BLADES MUST BE PURCHASED SEPARATELY

HUSQVARNA FS 400, 20" Flat Saw (967796502): A Contractor’s Guide to Performance, Specs, and Best Uses

The HUSQVARNA FS 400 20" flat saw (part number 967796502) is a compact, jobsite-tough walk-behind saw built for clean, straight cutting in concrete and asphalt, especially on smaller road repair and flatwork projects. It’s designed to deliver stable tracking, predictable depth control, and practical ergonomics—exactly what crews need when they’re cutting slab sections, patching utilities, or opening expansion joints where accuracy matters.

Below is a complete breakdown of what this saw is, what it’s best at, key specifications you should know before buying, and how to get the best performance (and blade life) out of it.

What the Husqvarna FS 400 (967796502) Is Built For

The FS 400 platform is positioned as an all-around petrol (gas) push floor saw with a focus on stability and easy handling. In real-world terms, it’s a great fit for:

• Small road repair (asphalt and concrete patching)

• Sidewalk and driveway cuts

• Control joints and expansion joints

• Slab removal and square/rectangular sectioning

• Utility trench tie-ins and surface prep

Husqvarna describes the FS 400 LV as an all-round petrol push floor saw with an adjustable handle and “excellent stability,” intended for concrete/asphalt applications up to 189 mm cutting depth. 

Key Specifications at a Glance

While listings vary slightly by retailer and configuration labeling, the commonly published specs for 967796502 include:

• Max blade diameter: 20 in 

• Max cutting depth: about 7.5 in to 7-5/8 in 

• Power source: Gas / petrol 

• Engine family (commonly listed): Honda GX390 

• Output / engine power (commonly listed): around 11–11.7 hp 

• Weight (commonly listed): about 219 lb 

• Arbor size (commonly listed): 1 in 

These numbers tell you what the FS 400 is really about: deep-enough cutting capacity in a compact footprint, without jumping into much larger, heavier saw classes.

What Makes the FS 400 a Good Fit on Real Jobsites

1) Stable tracking for straighter cuts

A floor saw that wanders costs time and blades. The FS 400 is built around balanced weight distribution for stability while sawing—helping operators keep long cuts straighter and reduce fighting the saw. 

2) Ergonomics that matter when you’re doing dozens of feet of cutting

Husqvarna highlights an adjustable handle for an ergonomic working position. In practice, this helps reduce fatigue and improves line tracking, especially on longer runs. 

3) Depth capability that covers most slab and repair work

With a max cutting depth commonly listed around 7.5" to 7-5/8", the FS 400 can handle a lot of “everyday” concrete and asphalt cutting—especially when you’re not trying to full-depth cut thick industrial slabs in one pass. 

Choosing the Right 20" Blade for the FS 400

A saw is only as good as the blade you put on it. For a 20" flat saw like the FS 400, match the blade to:

Material type

• Green concrete (fresh): softer bonds to avoid glazing

• Cured concrete: general concrete bonds depending on aggregate hardness

• Reinforced concrete: blades designed for rebar contact

• Asphalt: asphalt-specific blades with appropriate segment design

Cutting method

• Wet cutting is ideal for dust control and blade life (most floor saw workflows prefer wet cutting).

• Dry cutting is possible in some cases, but heat management becomes critical.

Your target outcome

• Fast production cuts (speed)

• Cleaner edges (finish)

• Longer blade life (value)

If your work rotates between asphalt patches and cured concrete, many contractors keep two dedicated blades rather than forcing one “universal” blade to do everything.

Best Practices for Cleaner Cuts and Longer Blade Life

Let the blade do the work

Pushing too hard increases heat and can cause segment glazing. Maintain a consistent feed rate and listen to the saw—RPM drop and bogging usually means you’re forcing it.

Use water correctly

If wet cutting, keep the flow steady enough to cool the blade and flush slurry. Inconsistent water flow is a common cause of overheating and uneven wear.

Score first, then deepen

For straighter lines and less chipping, many crews do a shallow guide pass, then deepen the cut on a second pass—especially on decorative concrete or when edge quality matters.

Dress the blade when it slows

If cutting speed drops, the blade may be glazed. Dressing it on abrasive material can expose fresh diamonds.

Maintenance Tips That Keep the FS 400 Ready

• Clean slurry off the saw after wet cutting—slurry buildup accelerates wear and can seize components over time.

• Check belt tension regularly (a slipping belt kills performance).

• Inspect the blade guard and water delivery components before every job.

• Keep fasteners tight—floor saw vibration can loosen bolts over time.

• Follow engine maintenance intervals (oil, air filter, spark plug) for reliable starts and full power.

Even a strong saw will feel “weak” with a clogged filter or neglected belt drive.

Safety Considerations (Especially for Jobsite Cutting)

• Use respiratory protection when dry cutting (silica dust risk)

• Wear eye/face protection—chips and slurry splash are common

• Confirm blade RPM rating matches the saw

• Keep the cut area clear; maintain stable footing

• Never lift or service the saw with the blade capable of free spin

• Train operators on kickback/line correction basics

Frequently Asked Questions

What is the Husqvarna FS 400 967796502 used for?
It’s a walk-behind flat saw designed for cutting concrete and asphalt, commonly used for small road repair, slab cutting, and joint work.

What size blade does the FS 400 take?
This configuration is commonly listed with a maximum 20" blade diameter. 

How deep can a 20" FS 400 cut?
Published specs commonly show a maximum cutting depth around 7.5" to 7-5/8" (depending on listing). 

What engine is on the FS 400 967796502?
Many product listings for 967796502 specify a Honda GX390 engine family. 

Is this saw good for asphalt?
Yes—Husqvarna positions it for small road repair jobs in concrete or asphalt. 

What arbor size does it use?
Common listings for this part number show a 1-inch arbor. 

How heavy is the FS 400 (967796502)?
It’s commonly listed around 219 lbs, which helps stability while still being manageable for a compact floor saw class. 

Should I wet cut with the FS 400?
Wet cutting is generally preferred for dust control and blade life. Many FS 400 listings reference practical wet-cut features like integrated water solutions and hose connections. 

Can it cut reinforced concrete with rebar?
Yes, with the correct reinforced concrete diamond blade. Expect slower feed rates when you hit steel, and keep water flow consistent.

Is the FS 400 good for daily contractor use?
It’s widely marketed as robust and jobsite-ready for frequent cutting tasks, especially in the small-to-mid floor saw category. 

Bottom Line

If you’re looking for a 20" walk-behind flat saw that’s built for straight, stable cutting on concrete and asphalt repair work, the HUSQVARNA FS 400 (967796502) is a strong, contractor-friendly option. With a max blade size of 20 inches and published max depth in the ~7.5-inch range, it covers a huge portion of real-world cutting needs without pushing you into the larger, heavier saw category. 

If you want, paste the BladesDirect.net product link you’re using, and I’ll tailor this article to match the exact listed specs, included accessories (blade guard, water tank, etc.), and your preferred call-to-action wording.