Description

Premium Features & Upgrades

• • Upgraded Forged Crankshaft Assembly – Built for strength and enhanced oil flow for durability.
  • Brand-New Cylinder Assembly – Provides OEM-level fit and smooth operation.

• Forged Nitride Valves – Deliver reduced wear and high-RPM reliability.
• Manganese Bronze Valve Guides – Outlast standard steel for longer service life.
• Re-machined Cylinder Head – Decked, shimmed, and leak-down tested for a precision seal.
• Heat-Resistant Valve Stem Seals – Built to withstand extreme heat without hardening.
• Factory-Spec Camshafts – Keep engine timing locked in for peak performance.
• Upgraded Main & Balance Shaft Bearings – Improve smoothness and long-term reliability.
• Heavy-Duty Timing & Oil Pump Chains – Reinforced design for dependable operation.
• Complete Oil Pump Assembly & Chain Tensioner – Maintain consistent lubrication at all times.
• Precision-Machined Engine Cases – Inspected and tested to ensure structural integrity.

Includes a complete gasket and seal kit for installation.

Compatibility

Fits Yamaha 242 LTD S 1800 Jet Boat Engine – 2016 through 2019 model years.

Warranty Coverage

Every REV6 engine comes with a 1-Year Premium Warranty. You can also choose our 2-Year No-Fault Warranty for added confidence. Either way, your investment is protected by the best coverage in the industry.

Rebuilt the Right Way

Each engine is hand-assembled by a master technician and carefully checked by another. With over five decades of combined experience, REV6 builds engines that consistently outperform stock.

Build Core Engine – What to Expect

This is a Build Core Engine. A solid, rebuildable core must be supplied. Our process includes full disassembly, machining, and a rebuild with premium upgraded parts to deliver better-than-new performance.

Not sure about core requirements? See our Help Center or contact our team before ordering.

Take Action

Restore your Yamaha 242 LTD S 1800 Jet Boat with confidence. Check our FAQ for details or review the Engine Rebuild Kit Guide for other options. Nationwide shipping comes standard on all REV6 engines.

Thank you for trusting REV6 with your rebuild — we’re proud to stand behind every engine we build.