Description

Built to perform. Tested to last. Backed by experience.

If your 2021–2025 Yamaha FX SVHO 1800 WaveRunner needs a new heart, this Build Core Engine delivers trusted power and proven durability. Each engine goes through extensive machining, precision assembly, and rigorous testing to ensure it meets or exceeds factory standards. Our process combines premium upgrades with skilled craftsmanship so you can ride with complete confidence.

Upgraded Components for Long-Term Reliability

• Upgraded Forged Crankshaft Assembly – Stronger alloy, improved oil flow, and superior strength.
• Brand-New Cylinder Assembly – Built for OEM fitment and smooth operation.
• High-Strength Forged Nitride Valves – Reduced wear and excellent performance at high RPMs.
• Manganese Bronze Valve Guides – Outlasts standard guides, cutting down oil consumption.
• Fully Machined Cylinder Head – Decked, shimmed, and leak-down tested for a perfect seal.
• Heat-Resistant Valve Stem Seals – Designed to endure extreme conditions.
• Factory-Spec Camshafts – Precise timing and reliable efficiency.
• Upgraded Main & Balance Shaft Bearings – Built to handle heavy use.
• Heavy-Duty Timing & Oil Pump Chains – Durability for long-term smooth operation.
• Complete Oil Pump Assembly & Chain Tensioner – Keeps your engine performing at peak levels.
• Thoroughly Machined Engine Cases – Inspected and tested for strength and integrity.

Includes all gaskets and seals needed for installation.

Model Compatibility

This Build Core fits the Yamaha FX SVHO 1800 WaveRunner (2021–2025).

Warranty Backing You Can Trust

• 1-Year Warranty included on every engine.
• Optional 2-Year No-Fault Warranty Upgrade ($450) – If something happens, we replace it. No questions asked.

Learn more about our warranty coverage and why riders nationwide choose REV6 for peace of mind.

Our Process, Your Confidence

Every engine is built under a strict quality control system. One master technician handles the assembly, and a second expert inspects it before shipment. With over 50 years of combined powersports knowledge, we deliver engines designed to outperform and outlast stock replacements.

Core Requirement – What You Need to Know

This product is sold as a Build Core Engine, not a ready-to-install unit. A complete, rebuildable core is required as the foundation for remanufacturing. Engines go through full disassembly, machining, and reassembly with upgraded components. The quality of your core directly impacts the reliability of the finished engine.

For details on shipping and acceptable cores, visit our Help Center. If you’re unsure about your core’s condition, reach out to our team before purchasing.

Take Action

Don’t gamble on stock replacements. Choose a proven rebuild with nationwide shipping and warranty protection. Review our FAQ for common questions or check our Engine Rebuild Kit Guide for other solutions. When ready, send in your core and let REV6 put you back on the water with confidence.