Description
Overview:
The O-Ring for Husqvarna 240R and 240F is a genuine sealing ring used across selected Husqvarna trimmers, brushcutters, and chainsaws. Made from a durable, fuel- and oil-resistant elastomer (black rubber), it sits in a circular groove to create a tight seal between mating parts. This prevents leaks and unwanted air ingress, helping the engine run smoothly and reliably. It is designed to match the correct size and hardness for the intended assemblies on these machines, giving a secure fit without deformation. Suitable for regular maintenance or repairs, it supports consistent starting, stable idling, and proper lubrication where applicable. Genuine status and model-specific compatibility provide confidence for both professional users and DIY owners working on Husqvarna 240R or 240F equipment.
Key Features:
- Genuine Husqvarna part for reliable, model-correct fit (MPN: 740 42 21-00 / 740422100)
- Oil- and petrol-resistant elastomer helps maintain seals under typical 2‐stroke operating conditions
- Helps prevent fuel and oil leaks and reduces air leaks that affect tuning and performance
- Supports proper pressure or vacuum where required for carburation and fuel delivery
- Simple to fit when replacing a worn or flattened ring in its groove
- Resists vibration, temperature changes, and regular use in demanding environments
- Helps restore smooth running, easier starting, and consistent output
- Black rubber construction for dependable resilience and long service life
Typical Applications:
Used to seal circular joints in fuel, oil, and air pathways on compatible Husqvarna machines. Typical locations include interfaces around fuel system connections, carburettor or intake housings, and other round seals in drive or housing assemblies. Suitable for routine servicing, leak fixes, and preventative maintenance on trimmers, brushcutters, and selected chainsaws.
Also known as:
O-ring seal, sealing ring, toroidal ring, rubber gasket ring, O-seal, packing ring, round section gasket. These terms refer to the same type of circular elastomer ring used to create a pressure-tight joint in a machined groove.
Fits Models:
240, 240F, 240R, 245, 245 R, 245 R EPA, 245 RX, 245R, 245REPA, 245RX, 266, 268, 61, 66, GR41, GR50, RS44
Alternate Part Numbers:
740 42 21-00, 740422100
Product Specifications
| L&S Part No. | 740 42 21 00 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Husqvarna |
| OEM No. | 740422100 |
| Unit of Sale | 1 |
| Applications | 240, 240F, 240R, 245, 245 R, 245 R EPA, 245 RX, 245R, 245REPA, 245RX, 266, 268, 61, 66, GR41, GR50, RS44 |
| Machine Type | Grass Trimmers |
| Fits Brands | Husqvarna |
| Fits Models | 266 | 268 | 61 | 66 | 240 | 240F | 240R | 245 | 245R | 245RX |
