25132-003000 V Belt for Yanmar 2GM 2GM20 2GML 2GMLP 2GMYE 2GMZ 3GM 3GMD 3GMLE 3GM30 6KH 6KHA 6KHK 6KHM 6KHS | JLM Marine

V Belt for Yanmar 2GM 2GM20 2GML 2GMLP 2GMYE 2GMZ 3GM 3GMD 3GMLE 3GM30 6KH 6KHA 6KHK 6KHM 6KHS

This V Belt is designed to fit a wide range of Yanmar marine inboard engines, including the 2GM, 3GM, and 6KH series. Engineered for reliable performance in marine environments, this belt ensures proper power transmission for your engine's alternator and water pump systems.

This aftermarket replacement belt is a direct replacement for OEM part number 25132-003000, providing dependable performance at an excellent value. Suitable for both professional marine mechanics and DIY enthusiasts performing routine maintenance.

• Compatible with multiple Yanmar 2GM, 3GM, and 6KH engine variants
• Direct fit replacement for OEM #25132-003000
• Essential component for engine cooling and electrical system operation

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

This package includes the following components:

• 1 × V Belt

Installation Guide

1. Disconnect the battery and ensure the engine is completely cool before beginning work.
2. Locate the existing V belt on your Yanmar engine, noting its routing path around the pulleys.
3. Loosen the alternator or tensioner mounting bolts to release tension on the old belt.
4. Remove the old V belt by sliding it off the pulleys.
5. Inspect all pulleys for wear, damage, or debris, and clean if necessary.
6. Route the new V belt around the pulleys following the same path as the original.
7. Adjust the alternator or tensioner position to achieve proper belt tension.
8. Tighten all mounting bolts securely once proper tension is achieved.
9. Check belt tension by pressing on the belt midway between pulleys; it should deflect approximately ½ inch with moderate pressure.
10. Rotate the engine by hand to ensure the belt runs smoothly without slipping or misalignment.
11. Reconnect the battery and start the engine to verify proper operation.
12. Re-check belt tension after the first few hours of operation and adjust if needed.

Troubleshooting & FAQ

Q: How do I confirm this V belt fits my Yanmar engine?
A: Cross-reference your engine model with our compatibility table above. Verify that your original belt matches OEM part number 25132-003000 to ensure proper fitment.

Q: How often should I replace the V belt on my Yanmar engine?
A: Inspect your V belt every 100 hours of operation or annually. Replace it if you notice cracking, glazing, fraying, or excessive wear, or every 2–3 years as preventive maintenance.

Q: What are the signs that my V belt is failing?
A: Common symptoms include squealing noises during operation, overheating due to water pump failure, battery not charging, visible cracks or glazing on the belt surface, or slipping under load.

Q: How do I achieve the correct belt tension during installation?
A: The belt should deflect approximately ½ inch when pressed firmly midway between pulleys. Too tight can damage bearings; too loose will cause slipping and premature wear.

Q: Is this an OEM or aftermarket belt?
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.