Husqvarna 503966601 Chainsaw Gasket

Product Description

The HUSQVARNA 503966601 is a genuine OEM replacement gasket designed for use in Husqvarna and Jonsered chainsaw models. Gaskets in this application create a sealed interface between engine components, preventing air and fuel leaks that would otherwise disrupt combustion and reduce performance. This is a direct factory replacement part, meaning it meets the same material and dimensional tolerances as the original. Licensed small-engine technicians and experienced chainsaw service shops are the typical installers for this type of component.

This gasket is used during engine disassembly and reassembly on specific Husqvarna and Jonsered chainsaw models. It is appropriate for repair work in both professional forestry and property-maintenance applications. Any service involving cylinder removal, carburetor rebuilding, or crankcase access on the compatible models listed below may require replacement of this gasket.

Key Features

• Genuine OEM Husqvarna part - matches original factory specifications
• Direct replacement for the superseded part number 503 96 66-01
• Compatible with both Husqvarna and Jonsered chainsaw platforms
• Engineered to maintain a proper seal under operating temperatures and pressures found in chainsaw engines

Compatibility

Fits the following models - Husqvarna: 359, 359 EPA, 357 XP EPA, 357 XP EPA I, 357 XP, 359 EPA I. Jonsered: CS2156, CS2159, CS2159 EPA, CS2156 EPA.

Installation Notes

This gasket should be installed by a qualified small-engine technician familiar with chainsaw engine service procedures. Before beginning any disassembly, drain the fuel system completely and allow the engine to cool. Old gasket material must be fully removed and mating surfaces cleaned before fitting the replacement. Follow the engine manufacturer's service manual for proper torque sequences on all fasteners during reassembly.