577878603 - Tank Cap Assy

The Husqvarna Tank Cap Assembly (Part #: 577878603) is a genuine OEM fuel tank cap designed to provide a secure, leak-resistant seal for the fuel system in select Husqvarna chainsaws and power equipment. Built with rugged threads and a durable gasket, this cap helps maintain fuel containment, pressure balance, and safety during operation and transport.

If your original cap is cracked, stripped, or leaking, this replacement restores OEM reliability and fit—essential for both performance and safety in the field.

Compatible Equipment Examples:

• Husqvarna 550XP Chainsaw

• Husqvarna 550XP Mark II Chainsaw

• Husqvarna 545 and 545 Mark II Chainsaws

• May also fit other models using the same tank cap design (verify by part number or manual)

Features:

• Genuine Husqvarna Tank Cap Assembly

• Part #: 577878603

• Seals fuel tank to prevent leaks and maintain proper fuel pressure

• Durable construction with integrated gasket

• OEM fit for quick, secure installation

• Essential for safe operation and fuel system maintenance

• Designed for use in rugged outdoor environments

Bee Green in Oakland is your trusted Husqvarna dealer, proudly serving the Bay Area with OEM fuel system parts, safety accessories, and expert support for chainsaws and other power equipment.