Description
Overview:
This genuine Husqvarna tank vent assembly is a small fuel-system component for professional petrol chainsaws such as the 395 XP and 395 XP EPA. Built from fuel‐resistant polymer and rubber, it provides controlled, one‐way ventilation of the fuel tank to equalise internal pressure while keeping fuel and debris inside the system. Correct venting helps prevent pressure build‐up and vacuum lock, supporting smooth starts, clean idling, and consistent cutting performance. The assembly is OEM‐matched for fit and routing in the saw body, so installation is straightforward during routine servicing or when replacing a blocked or perished breather. Suitable for heavy‐duty use in forestry, arborist, and milling work where reliability is essential.
Key Features:
- Genuine Husqvarna OEM part for precise fit and compatibility
- One‐way breather design equalises tank pressure and prevents vacuum lock
- Helps reduce fuel starvation, erratic idle, and stalling under load
- Fuel‐resistant materials (polymer and rubber) for durability with modern fuels
- Simple push‐fit grommet assembly for quick replacement using basic tools
- Designed for the routing and space of the 395‐series chassis for leak‐free sealing
- Supports consistent performance and easier hot and cold starting
- Direct replacement for OEM numbers 503 66 84‐04 and 503668404
- Suitable for routine maintenance to protect engine efficiency and lifespan
- Genuine Part status for assured quality control and reliability
Typical Applications:
Used during servicing or when symptoms appear, such as a hiss when opening the fuel cap, fuel tank vacuum, poor acceleration, stalling under load, or seepage around the breather. Common after long storage, ethanol‐blend fuel exposure, or heavy professional use in felling, cross‐cutting, and milling. Fits quickly in the workshop or on site.
Also known as:
Tank breather, breather valve, one‐way breather, duckbill valve, check‐valve breather, fuel breather assembly, vent check valve.
Fits Models:
394XP, 395 XP, 395 XP EPA, 395XP, 395XPEPA
Alternate Part Numbers:
503 66 84-04, 503668404
