The Husqvarna 542166707 Key Switch is a genuine OEM component designed for the FS4800D, FS8400D, and FS3500E floor saws. As a direct factory replacement, this key switch meets the original electrical specifications for these machines, ensuring the ignition circuit operates exactly as intended. Compatible across all three floor saw models, this part is the correct choice when the original switch has failed or is no longer functioning reliably. DHS Equipment supplies this part to help keep your equipment running at full capacity.
Key Features
- Genuine OEM Electrical Specification — Manufactured to Husqvarna's original circuit and contact ratings, so the ignition and shutdown functions perform to the same standard as the factory-installed switch.
- Direct-Connect Replacement — Engineered to match the original mounting position and wiring harness connector on the FS4800D, FS8400D, and FS3500E, allowing a straightforward swap during service.
- Broad Floor Saw Compatibility — A single part number covers the FS4800D, FS8400D, and FS3500E floor saws, making it the correct replacement across this range of Husqvarna walk-behind flat saws.
- Restored Ignition Control — A failed or intermittent key switch can prevent a floor saw from starting or cause unexpected shutdowns mid-cut; replacing it with this OEM unit restores full, predictable operator control.
- Electrical Safety Compliance — Using the correct OEM key switch ensures the machine's start and emergency-stop circuits function within Husqvarna's designed safety parameters, an important consideration on any active cutting site.
The key switch is the primary operator interface for starting and shutting down the floor saw's engine or motor. It controls the ignition circuit, allowing the machine to start when turned to the run position and cut power when turned off or returned to the stop position. When the switch wears out or develops a fault — common symptoms include failure to start, intermittent power loss, or an inability to shut the machine down cleanly — the entire saw becomes unreliable or unusable until the switch is replaced. Cross-reference part number 542166707 against your parts diagram to confirm fitment before ordering.
Part Details
| Part Number | 542166707 |
|---|---|
| Brand | Husqvarna |
| Part Type | Genuine OEM |
| Description | Key Switch |
Compatibility & Fitment
| Name | Model |
|---|---|
| Floor Saw | FS4800D |
| Floor Saw | FS8400D |
| Floor Saw | FS3500E |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
