Description
Overview:
This Genuine Husqvarna engine gasket (MPN 503 16 21-03 / 503162103) is designed for Husqvarna 55 and 51 chainsaws. It creates a reliable, airtight seal between mating engine components to maintain correct pressure and prevent air, fuel, or oil leaks. Made from heat- and fuel-resistant composite gasket material, it withstands the demands of two‐stroke operation and regular use. The profile and bolt-hole pattern are cut to Husqvarna specifications for a precise fit, helping the saw run smoothly and start reliably after service work. Use it during routine maintenance or rebuilds to replace worn or damaged gaskets, protect internal parts from contamination, and keep the fuel/air mixture stable under load. This is a Genuine Husqvarna part for dependable fit and performance.
Key Features:
- Genuine Husqvarna part for correct fit and sealing integrity
- Fuel-, oil-, and heat-resistant composite material for durability
- Helps prevent vacuum leaks that cause poor running or hard starting
- Supports correct crankcase pressure and consistent engine performance
- Cut to OEM spec for accurate alignment of ports and fasteners
- Suitable for routine maintenance, overhauls, and rebuilds
- Stable sealing helps maintain tuning and throttle response
- Designed for the rigours of regular chainsaw use
- Straightforward to install with standard workshop tools
- OEM reference: 503 16 21-03 / 503162103
Typical Applications:
Replacement during engine servicing when resealing mating faces such as crankcase or cylinder base. Used after removing major components, or when diagnosing air leaks, idle instability, or loss of power. Suitable for professional users and DIY owners maintaining Husqvarna chainsaws for forestry, landscaping, firewood cutting, and general property maintenance.
Also known as:
Engine gasket, sealing gasket, crankcase gasket, cylinder base gasket, chainsaw gasket, paper/fibre gasket, OEM gasket, replacement seal, motor seal.
Fits Models:
Husqvarna 51
Husqvarna 55
Husqvarna 55 Rancher
Alternate Part Numbers:
503 16 21-03, 503162103
Product Specifications
| L&S Part No. | 503 16 21 03 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Husqvarna |
| OEM No. | 503162103 |
| Unit of Sale | 1 |
| Applications | 51, 55, 55 Rancher, Husqvarna 55 Rancher, Husqvarna51, Husqvarna55, Husqvarna55 Rancher |
| Machine Type | Chainsaws |
| Fits Brands | Husqvarna |
| Fits Models | 51 | 55 | 55 RANCHER |
