Description

Yamaha 242 LTD 1800 Engine | Jet Boat Rebuild (2013–2015)

When it’s time for a serious engine upgrade, trust REV6 to deliver a build that performs on and off the water.

This Build Core Engine is custom remanufactured for the 2013–2015 Yamaha 242 LTD jet boat. Once we receive your core, we fully disassemble the engine, inspect every part, machine to factory specs (or better), and rebuild it using forged and upgraded internals. The result? A powerful, reliable marine engine made to go the distance.

Whether you’re running full throttle or cruising the lake, this engine gives you the confidence to push your boat without worrying about performance or longevity.

What’s Included in Your Engine Build

We use only premium components and proven processes to ensure each engine meets or exceeds OEM performance standards:

• Upgraded forged crankshaft assembly for improved oil flow, strength, and longevity
• Brand-new cylinder assembly designed for OEM-level fit and smooth performance
• High-strength forged nitride valves for better wear resistance under high RPM
• Manganese bronze valve guides for improved oil control and durability
• Fully rebuilt and machined cylinder head—decked, shimmed, and pressure tested
• Heat-resistant valve stem seals designed to withstand high-temperature marine use
• Factory-spec camshafts for optimized valve timing and engine efficiency
• Upgraded main and balance shaft bearings built for long-term use
• Heavy-duty timing and oil pump chains for smoother internal operation
• Complete oil pump assembly and chain tensioner included
• Engine cases that are thoroughly cleaned, machined, and inspected for cracks or wear
• All necessary gaskets and seals included for your installation

Backed by a Strong Warranty

• 1-Year Warranty Included – Covers workmanship and internal components
• 2-Year No-Fault Warranty Upgrade ($450) – Full engine replacement with no questions asked

For details, view our Warranty Policy.

Build Core Engine Details

This engine is rebuilt from a core you provide. To qualify, the core must be complete and free of major cracks, missing parts, or excessive wear. We inspect all cores before starting the rebuild process to ensure the foundation meets our standards.

If you’re unsure about your engine’s condition, please check the FAQ or Contact Us. You can also review shipping info here.

Why Go with REV6?

• Over 50 years of combined experience in powersports and marine engine remanufacturing
• Each engine is built by one expert and independently inspected by another
• Real-world testing ensures every engine holds up under real marine conditions
• Trusted by boaters, techs, and racers nationwide
• Nationwide shipping to your shop, marina, or home garage

Need Help Deciding?

• Reach out to our team with questions about fitment or core condition
• Still comparing options? Visit our Engine Rebuild Kit Guide