Volvo Penta's 4.3L, 5.0L, 5.7L, and 8.1L gasoline engines are popular inboard and sterndrive marine power units found in a wide range of powerboats and sport cruisers. The fuel pump assembly is a critical component that delivers consistent fuel pressure to the engine — when it fails, you'll experience hard starts, rough idle, fuel starvation under load, engine stalling, or a boat that won't start at all. This brand-new replacement fuel pump assembly is a direct replacement covering six cross-reference part numbers including 3594444, 21545138, and 21397771, engineered to restore correct fuel pressure and flow for reliable marine engine operation.

✅ Direct-Fit Compatibility

• Volvo Penta Marine Engines: 4.3L, 5.0L, 5.7L, 8.1L gasoline inboard/sterndrive
• Direct replacement — no modifications required

🔧 Product Highlights

• 100% Brand New Replacement: Not rebuilt or refurbished — starts with a full service life
• OEM-Spec Fuel Pressure & Flow: Correct delivery rate and pressure for reliable fuel supply across all engine speeds and loads
• Complete Assembly: Supplied as a full pump assembly — ready to install
• 6 Cross-Reference Part Numbers: Covers all Volvo Penta OEM numbering variants for confirmed fitment
• Broad Engine Coverage: Fits four Volvo Penta engine displacements in a single part number
• Marine-Critical Reliability: Consistent fuel delivery for dependable power when it matters most on the water

📦 What's Included

• 1 × Fuel Pump Assembly (3594444 / 21545138 / 21397771)

🔑 Key Specs

• Part Numbers: 3594444, 21545138, 21397771, 3861355, 3860210, 21608511
• Condition: 100% New Replacement
• Fitment: Volvo Penta 4.3L / 5.0L / 5.7L / 8.1L gasoline marine engines

Please verify your engine model and existing part number before ordering. Contact us for fitment confirmation if needed.