Volvo Penta 3581019 Non-Return Valve / Intake Flapper - Used

Used Volvo Penta non-return valve / intake flapper assembly, likely P/N 3581019 (replaces 860402). Cast aluminum Y-body with an internal spring-loaded flapper valve, flanged mounting foot, and dual inlet ports. Application: Volvo Penta marine/industrial diesel air intake systems (D9 / D12 / TAMD / TWD families - confirm by engine serial number). Condition: used take-off, casting sound, internal flapper intact and free, light surface oxidation and shop soil only. Buyer must confirm fitment by part number, photos, dimensions, engine model, serial number, and application before purchase. Used marine part sold as-is unless otherwise stated. No returns on electrical, used, special-order, or installed parts.