Description
Overview:
The Throttle Spring for Husqvarna 143R brushcutters is a genuine Husqvarna replacement part (MPN 537 17 42 01) made from durable spring steel. It provides the return tension that brings the throttle back to idle and keeps the trigger feel consistent during use. This small but critical component helps maintain smooth throttle response, stable idling, and safe control, especially during prolonged trimming or brushcutting. Designed for Husqvarna handheld machines, it is a direct fit for popular models such as the 143R and 122R, among others. If your throttle feels sluggish, fails to return properly, or has lost its snap, replacing the spring restores proper operation and prevents unnecessary wear on the throttle cable and carburettor linkage.
Key Features:
- Genuine Husqvarna part for assured compatibility and performance
- Correct tension rate for reliable throttle return and stable idle
- Durable spring steel construction for long service life
- Helps maintain crisp throttle response and fine control
- Precise fit reduces risk of cable snagging or uneven wear
- Supports safe operation by returning the trigger to idle position
- Simple to fit with basic hand tools; minimal downtime
- Suitable for routine maintenance and preventative servicing
- OEM specification for consistent performance in tough conditions
Typical Applications:
Used to restore or maintain the throttle mechanism on Husqvarna brushcutters and other handheld machines. Ideal when the throttle does not spring back, idling is erratic, or after disassembly of the handle/throttle assembly during cable, trigger, or carburettor service. Suitable for garden maintenance, landscaping, and professional brushcutting.
Also known as:
Throttle return spring, throttle control spring, trigger return spring, carburettor throttle spring.
Fits Models:
122R
142R
143RS
143RST
326 AI 25
343FRM
525RX Mark II
525RXT Mark II
580BTS Mark III
Alternate Part Numbers:
537 17 42 01, 537174201
Product Specifications
| L&S Part No. | 537 17 42 01 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Husqvarna |
| OEM No. | 537174201 |
| Applications | 122R, 142R, 143RS, 143RST, 326 AI 25, 343FRM, 525RX Mark II, 525RXT Mark II, 580BTS Mark III |
| Fits Brands | Husqvarna |
| Fits Models | 142R | 326 AI 25 | 580BTS Mark III | 525RX Mark II | 525RXT Mark II | 343FRM | 122R | 143RS | 143RST |
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