852644 Non Return Valve Exhaust Flap for Volvo Penta 290 SP DP | JLM Marine

Non Return Valve Exhaust Flap for Volvo Penta 290 SP DP – Replaces 852644

This aftermarket Non Return Valve / Exhaust Flap is designed for Volvo Penta Sterndrive units, including the 290, SP-A, SP-B, SP-C, SP-D, SP-E, 290-DP, DP-A, DP-B, DP-C series. Engineered to meet OEM specifications, this exhaust flap ensures reliable performance and proper exhaust flow control in your sterndrive system.

This part directly replaces Volvo Penta 852644 and RM852644, providing a cost-effective solution for maintaining your sterndrive's exhaust system integrity.

• Direct replacement for Volvo Penta sterndrive exhaust systems
• Fits multiple 290 and DP series models
• Prevents backflow in exhaust system

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below.

Technical Specifications

Package Contents

• 1 × Non Return Valve / Exhaust Flap

Installation Guide

1. Disconnect the battery and ensure the engine is completely cool before beginning work.
2. Access the sterndrive unit and locate the exhaust flap housing on the transom assembly.
3. Remove any fasteners or clamps securing the old exhaust flap. Take note of the orientation and positioning.
4. Carefully extract the old non-return valve/exhaust flap from its mounting location.
5. Inspect the mounting surface and clean any debris, corrosion, or old gasket material thoroughly.
6. Position the new exhaust flap in the same orientation as the original component.
7. Secure the new valve with appropriate fasteners, ensuring a tight seal to prevent exhaust leaks.
8. Double-check all connections and verify proper flap movement before reassembly.
9. Reconnect the battery and perform a brief engine test to confirm proper exhaust flow and no backflow.

Troubleshooting & FAQ

Q: How do I confirm this exhaust flap fits my Volvo Penta sterndrive?
A: Cross-reference your current part number with 852644 or RM852644, and verify your sterndrive model is one of the compatible series listed (290, SP-A through SP-E, or DP-A through DP-C).

Q: What are the signs that my exhaust flap needs replacement?
A: Common symptoms include water intrusion into the exhaust system, unusual exhaust noise or backflow, corrosion or cracking of the rubber flap, and loss of exhaust pressure.

Q: How often should I replace the non-return valve?
A: Inspect the exhaust flap annually during routine maintenance. Replace it if you notice cracks, tears, hardening of the rubber, or loss of flexibility, typically every 3–5 years depending on usage and water conditions.

Q: Will this aftermarket flap perform the same as the OEM Volvo Penta part?
A: Yes, this aftermarket replacement is manufactured to OEM specifications using comparable materials and is designed to provide equivalent performance and durability at a more competitive price.

Q: OEM vs. Aftermarket?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.