V-Belt – Fits Yanmar 6LY Series Inboard Engines (Replaces 119593-42280E)

V-Belt – Fits Yanmar 6LY Series Inboard Engines (Replaces 119593-42280E)

This V-belt is designed for Yanmar 6LY series 4-stroke diesel engines, specifically for 6-cylinder inboard marine applications ranging from 315 to 440 HP. It serves as a crucial component for driving the engine's alternator or generator.

This part is a direct replacement for Yanmar OEM part numbers 119593-42280 and 119593-42280E, ensuring a precise fit and reliable performance for the specified engine models.

• Product Type: High-durability V-Belt (A53 Size)
• Primary Use: Alternator/Generator Belt
• Compatible Fuel Type: Diesel

Part Number Cross-Reference

Use this table to confirm equivalent part numbers for this component.

Compatible Engine Models

Confirm your engine model/year in the table below.

Technical Specifications

Package Contents

• 1 x V-Belt A53 (Replaces 119593-42280E)

Installation Guide

1. Ensure the engine is turned off and cooled completely.
2. Disconnect the battery to prevent accidental starting.
3. Loosen the alternator pivot bolt just enough for movement. Also, loosen any adjuster-plate or tensioner bolts.
4. Note the belt's path around the crankshaft, water pump, and alternator pulleys.
5. Relieve tension by swiveling the alternator or tensioner, then slip the old belt off the pulleys.
6. Inspect pulley grooves for wear, rust, or corrosion. Clean them thoroughly if needed.
7. Route the new belt following the same path, ensuring it seats correctly in all V-grooves.
8. Tension the new belt. A correctly tensioned belt should deflect about 1 cm (½″) under moderate thumb pressure on its longest span.
9. Tighten all bolts, securing the adjuster-plate bolt first, followed by the main pivot bolt to factory torque specs.
10. Reconnect the battery.
11. Start the engine and observe the belt to ensure it is tracking correctly and running smoothly.
12. Shut the engine down and recheck tension after a short run, as new belts may stretch slightly.

Troubleshooting & FAQ

How do I confirm this fits my engine?
First, check the "Compatible Engine Models" table on this page to see if your Yanmar 6LY model is listed. Second, verify that your existing belt's part number matches one of the numbers in our "Part Number Cross-Reference" table, such as 119593-42280E.

What is the correct tension for this V-belt?
A properly tensioned V-belt should have a slight give. On the longest span between pulleys, it should deflect approximately 1 cm (or ½ inch) when pressed with moderate thumb pressure. Over-tightening can cause premature wear on bearings, while under-tightening can lead to slipping and poor alternator performance.

What are the signs my old V-belt needs replacing?
Common signs of a failing V-belt include high-pitched squealing noises during engine operation (especially at startup), visible cracks or fraying on the belt's surface, a glazed or shiny appearance in the pulley contact area, or loss of alternator charging capability.

OEM vs. Aftermarket?
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.

How fast do you ship and how much does it cost?
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.

What is your warranty and return policy?
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.