21457172 Seawater Filter | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta D4 and D6 Seawater Filter Assembly - Part Number: 21457172

A complete raw-water strainer used on early Volvo Penta D4 and D6 marine diesel installations. The assembly has a downward-facing inlet and side-facing outlet and removes debris before seawater reaches the cooling system.

⚙️ Key Features

• Complete seawater-strainer assembly

• Transparent inspection cover

• Removable internal strainer

• Downward inlet and side outlet

• Protects seawater pump and heat exchangers

• Serviceable lid, handle, seals and filter element

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 21457172 → Replaces 3889148

• Related earlier assemblies: 3809070, 3582986, 3809071 and 3583338

OEM / Related Numbers:

• 21457172 - Complete seawater filter

• 3583342 - Filter housing

• 3583340 - Sealing ring

• 3583341 - Strainer

• 3583339 - Pressure plate

• 21400685 - Cover kit

• 3583853 - Spacer sleeve

• 21400696 - Cover

• 994722 - Spacer sleeve

• 21457174 - Handle

• 21400686 / 21368510 - Brackets

• 942001 / 946173 - Screws

• 963105 / 945408 - Nuts

• 21380890 - Related pump

• 943370 - Hose

Aftermarket / Verified Equivalents:

• No confirmed branded equivalent

🚤 Compatibility

• D4-210A-A / D4-210A-B

• D4-225A-B/C/D and D4-225I-B

• D4-260A-A/B/C/D

• D4-260D-B/C/D

• D4-300A-A/C/D

• D4-300D-A/C/D

• D6-280A-A/B/C/D

• D6-310A-A/B

• D6-310D-B/C/D

• D6-330A-B/C/D

• D6-330D-B/C/D

• D6-350A-A/B

• D6-370A-B/C/D

• D6-370D-A/B/C/D

• D6-435D-A/C/D

🔌 Function

The filter removes weed, shell fragments, sand and other debris from incoming seawater before it enters the pump and heat exchangers.

Common signs of failure or damage:

• Reduced seawater flow

• Engine overheating

• Debris visible through the cover

• Cracked or cloudy housing

• Water leaking around the lid

• Damaged strainer

• Handle or cover unable to seal securely

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging