Description
Overview:
This Trigger Interlock is a genuine Husqvarna safety component for petrol chainsaws. Made from tough, moulded polymer in Husqvarna orange, it works with the throttle system to prevent accidental trigger activation until the operator deliberately engages it. It is designed for a precise OEM fit and reliable operation on a range of Husqvarna models, including the 350 and 357XP. Supplied to the original specification under MPN 503854401 (also referenced as 503 85 44 01), it restores the correct safety function if your existing interlock is worn, cracked or missing. Suitable for professional and domestic users, this part helps maintain safe, consistent control of the saw during starting, carrying and cutting tasks, and supports the overall integrity of the rear handle assembly.
Key Features:
- Genuine Husqvarna part for assured compatibility and function
- Direct replacement for worn or broken interlocks to restore safety
- Durable, oil- and fuel-resistant polymer for long service life
- Precise moulding ensures smooth engagement with the throttle trigger
- Helps prevent unintended throttle activation during start-up and transport
- Easy to fit with basic hand tools; no modifications required
- Stable performance in typical forestry and landscaping conditions
- Colour-matched Husqvarna orange for easy identification
- Suitable for everyday use by professionals and DIY users alike
- Supports correct operation of the rear handle safety system
Typical Applications:
Replacement safety interlock for Husqvarna chainsaws used in felling, limbing, firewood processing, landscaping and property maintenance. Ideal when refurbishing a saw, completing a handle repair, or resolving intermittent throttle lockout issues to maintain safe operation on site or at home.
Also known as:
Throttle lockout, throttle interlock, safety throttle latch, lock-off lever, safety catch, interlock lever.
Fits Models:
340, 340E, 345, 345E, 345E TrioBrake, 346XP, 346XP TrioBrake, 350, 351, 353, 353 TrioBrake, 357XP, 359
Alternate Part Numbers:
503 85 44-01, 503854401
Product Specifications
| L&S Part No. | 503 85 44 01 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Husqvarna |
| OEM No. | 503854401 |
| Unit of Sale | 1 |
| Applications | 340, 340E, 345, 345E, 345E TrioBrake, 345ETrioBrake, 346XP, 346XP TrioBrake, 346XPTrioBrake, 350, 351, 353, 353 TrioBrake, 353TrioBrake, 357XP, 359 |
| Machine Type | Chainsaws |
| Fits Brands | Husqvarna |
| Fits Models | 340 | 340E | 345 | 345E | 345E TRIOBRAKE | 346XP | 346XP TRIOBRAKE | 350 | 351 | 353 | 353 TRIOBRAKE | 357XP | 359 |
