Husqvarna Bulkhead Partition Kit OEM #503764801

Husqvarna Bulkhead Partition Kit OEM #503764801 — Genuine Carburetor Intake Bulkhead Partition for Husqvarna 50, 51 & 55 Series Chainsaws

Restore a sealed, heat-resistant carburetor-to-engine connection with the genuine Husqvarna Bulkhead Partition Kit, OEM part number 503764801. This factory-original kit — also known as the carburetor adapter kit, carburetor connector, intake bulkhead partition manifold, and heat shield bulkhead assembly — is a critical component positioned between the carburetor and the engine cylinder on Husqvarna 50-series professional chainsaws.

This carburetor adapter kit fits between the carburetor and engine cylinder. The kit may include multiple parts; refer to your parts diagram for a complete list of parts included. Let the engine cool and drain the gas tank before installing this part. Work in a well-ventilated area and wear work gloves to protect your hands.

The bulkhead partition serves two essential functions: it creates a sealed intake passage that delivers the air-fuel mixture from the carburetor into the engine cylinder without air leaks, and it acts as a thermal barrier (heat shield) that insulates the carburetor from the extreme heat generated by the engine cylinder. When the partition cracks, hardens, warps, or develops air leaks due to heat cycling and fuel exposure, the engine suffers lean running conditions, rough idling, hard starting, loss of power, and potential engine damage from unmetered air bypassing the carburetor. Replacing it with a genuine OEM part restores a perfect seal and proper carburetor function.

Customers confirm the part fits perfectly the first time and works exactly as it should.

Compatible Equipment: Fits Husqvarna 50, 50 Rancher, 50 Special, 51, 51 EPA, 55, 55 EPA, 55 Rancher, and 55 Rancher EPA chainsaws across multiple production years. Also fits compatible Husqvarna-produced brands including AYP, Craftsman, Jonsered, McCulloch, Poulan, Poulan Pro, RedMax, and Weed Eater models requiring part #503764801.

Always verify compatibility with your specific model and serial number before ordering. Allow the engine to cool completely and drain the fuel tank before installation. Consult your parts diagram for the complete list of components included and correct installation procedure.