Description
Overview:
This Genuine Husqvarna crankshaft oil seal (MPN 505275719) is a small but critical engine part for Husqvarna chainsaws, including models such as 357XP and 359. The seal sits around the crankshaft to keep engine oil in and air leaks out, helping to maintain correct crankcase pressure and reliable two‐stroke performance. Built from durable, oil‐resistant materials for long service life, it helps protect against premature wear of internal components. The precise sizing ensures a snug fit: outer diameter 26 mm, inner diameter 16 mm, thickness 4 mm. Use it as a direct replacement during servicing or repairs when symptoms such as erratic idling, poor acceleration, or visible oil seepage appear. Suitable for professional and domestic users who need dependable sealing.
Key Features:
- Genuine Husqvarna part for assured fit and compatibility
- Helps maintain crankcase vacuum and engine integrity to prevent air and oil leaks
- Durable, oil‐resistant construction for long‐lasting performance
- Precise dimensions: 26 mm OD, 16 mm ID, 4 mm thickness
- Supports smooth starting, steady idle, and consistent cutting power
- Suitable for regular maintenance and overhaul work
- Easy to install with standard workshop tools, keeping downtime low
- Compatible with a wide range of Husqvarna chainsaws and clearing saws
Typical Applications:
Replacement of worn or leaking crankshaft seals during engine rebuilds or routine maintenance on Husqvarna chainsaws. Used to cure air leaks that cause lean running, hunting idle, or loss of power. Ideal when refreshing bearings and gaskets, or after high‐hour use in forestry, landscaping, arborist work, and farm or domestic cutting.
Also known as:
Rotary shaft seal, radial lip seal, engine crank seal, primary side seal, flywheel/magneto‐side seal, drive‐side seal, engine oil seal.
Fits Models:
240, 240F, 240R, 245, 245R, 245RX, 254, 257, 261, 262XP, 343F, 343FR, 343FRM, 343R, 345FR, 345FX, 345FXT, 345R, 345RX, 346XP, 351, 353, 356BF, 356BT, 357XP, 359, 362, 362XP, 365, 365 X-Torq, 365H, 371K, 371XP, 372XP, 372XP X-Torq, 375K, 40, 45, 49, 51, 545F, 545FR, 545FX, 545FXT, 545RX, 545RXT, 55, 55 Rancher, 576XP
Alternate Part Numbers:
505 27 57-19, 505275719
Product Specifications
| L&S Part No. | 505 27 57 19 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Husqvarna |
| OEM No. | 505275719 |
| Unit of Sale | 1 |
| Applications | 240, 240F, 240R, 245, 245R, 245RX, 254, 257, 261, 262XP, 343F, 343FR, 343FRM, 343R, 345FR, 345FX, 345FXT, 345R, 345RX, 346XP, 351, 353, 356BF, 356BT, 357XP, 359, 362, 362XP, 365, 365 X-Torq, 365H, 371K, 371XP, 372XP, 372XP X-Torq, 375K, 40, 45, 49, 51, 545F, 545FR, 545FX, 545FXT, 545RX, 545RXT, 55, 55 Rancher, 576XP |
| Machine Type | Chainsaws |
| Fits Brands | Husqvarna |
| Fits Models | 254 | 257 | 261 | 262XP | 346XP | 351 | 353 | 357XP | 359 | 362 | 362XP | 365 | 365H | 365X-TORQ | 371XP | 372XP | 372XP X-TORQ | 40 | 45 | 49 | 51 | 55 | 55 RANCHER | 576XP | 371K | 240 | 240F | 240R | 245 | 245R | 245RX | 343F | 343FR | 343R | 345FR | 345FX | 345FXT | 345R | 345RX | 356BF | 356BT | 545FR | 545FX | 545RX | 545RXT | 545FXT | 375K | 545F | 343FRM |
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