Timing Belt – Fits Volvo Penta 230A, 250, 251 Marine Engines (Replaces 463377)

Timing Belt – Fits Volvo Penta 230A, 250, 251 Marine Engines (Replaces 463377)

This high-quality aftermarket timing belt is designed for various Volvo Penta 4-cylinder, 4-stroke gasoline marine engines, including models in the 230, 250, and 251 series manufactured between 1989 and 1992. It ensures precise camshaft and crankshaft synchronization for optimal engine performance and reliability.

Engineered as a direct replacement for Volvo Penta part number 463377, it also cross-references with other popular aftermarket brands, providing a reliable and cost-effective alternative to OEM parts.

• Features a durable, fiber-reinforced rubber construction with a square tooth profile for non-slip engagement.
• Designed for gasoline (petrol) 4-stroke marine engine applications.
• Installs on the engine's camshaft timing drive to maintain critical engine timing.

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 x Timing Belt (Replaces 463377)

Explosion Diagram

Installation Guide

1. Disconnect the boat's battery to ensure safety.
2. Remove any accessory drive belts and timing belt covers to access the belt.
3. Carefully rotate the engine to align the crankshaft and camshaft timing marks to their Top Dead Center (TDC) positions as specified by the manufacturer.
4. Loosen the tensioner pulley bolt and remove the old, worn timing belt.
5. Install the new timing belt, starting with the crankshaft sprocket and working your way around, ensuring the belt is taut between gears.
6. Apply the correct tension to the belt by adjusting the tensioner pulley according to your service manual's specifications, then tighten the tensioner bolt.
7. CRITICAL: Double-check that all timing marks on the sprockets are still perfectly aligned.
8. Manually rotate the engine through two full revolutions using a wrench on the crankshaft bolt, and verify that the timing marks align perfectly again.
9. Reinstall the timing belt covers and any accessory belts that were removed.
10. Reconnect the battery, start the engine, and listen for any unusual noises to confirm proper installation.

Troubleshooting & FAQ

Q: How do I confirm this belt fits my Volvo Penta engine?

A: First, check your engine model against the list in the "Compatible Engine Models" table above. Second, verify that your current belt's part number is listed in our cross-reference table. This belt directly replaces OEM part 463377.

Q: What is a "square tooth profile" and why does it matter?

A: The square tooth profile is designed to engage precisely with the sprockets on your engine's camshaft and crankshaft. This ensures there is no slippage and that valve timing remains accurate, which is critical for engine performance, efficiency, and safety.

Q: How often should I replace my engine's timing belt?

A: Replacement intervals are determined by the engine manufacturer's service recommendations. As a general guideline, timing belts should be inspected at least annually for cracks, fraying, or wear and replaced proactively every 5-7 years or after a specific number of operating hours to prevent unexpected failure.

Q: What are the signs of a failing timing belt?

A: Common symptoms of a worn or failing timing belt include a rhythmic ticking or slapping noise from the engine bay, rough idling, engine misfires, or difficulty starting the engine. If you see any of these signs, inspect the belt immediately.

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.