366-5513 3665513 CAT Marine Engine Assembly C18 Diesel Motor for Boat Excavator

01.  Product Overview

This CAT C18 Marine Engine Assembly (part number 366-5513) is a complete, ready-to-fit diesel power unit. As a full Engine assembly, it arrives as one integrated package — cylinder block, cylinder head, crankshaft, pistons, liners, connecting rods, bearings, turbocharger, fuel system and cooling circuit — so a single order replaces dozens of individual lines and puts your Marine Engine back to work with minimal downtime.

Every CAT Marine Engine in this build is cleaned, inspected and re-machined to CAT reference tolerances: cylinder bores are honed, crankshaft journals reground and bearing clearances matched for stable oil pressure and smooth running. The result performs like the original power pack while fitting the same mounts, manifolds and control interfaces — a practical, cost-effective alternative to a brand-new engine for shipyards, fleet operators and workshops that regularly source Excavator Engine Parts and marine power solutions.

With an 18.1-litre displacement and ratings up to 597 kW (800 bhp), the C18 is trusted for continuous heavy-duty duty cycles. Whether you are repowering a tug, refitting a workboat or rebuilding an excavator, this Marine Engine assembly delivers dependable torque and long service life in some of the world's toughest operating environments.

02.  What Is Included in This Engine assembly

03.  Performance & Specifications

04.  Why Buy This C18 Marine Engine

• Complete drop-in unit — a single Engine assembly (366-5513) covers the entire power pack, cutting sourcing and assembly time for Excavator Engine Parts and marine rebuild projects.
• Precision remanufacturing — bores honed, journals reground and bearing clearances matched to CAT reference tolerances for stable output.
• Matched C18 fitment — bolt-on compatibility with original mounts, manifolds and control interfaces.
• Full traceability — every internal group is listed with its part number, so you can cross-check quickly against your own parts list.
• Flexible B2B supply — sample orders for validation and full container loads for distributors, shipyards and service fleets.
• Heavy-duty build — an 18.1 L Inline-6 platform rated to 597 kW, engineered for continuous marine and construction duty cycles.

05.  Applications

This CAT Marine Engine and Marine Engine assembly is widely used on:

06.  Wholesale Supply for Global B2B Buyers

We supply this CAT C18 Marine Engine Assembly in wholesale and project quantities to importers, distributors, shipyards and repair fleets worldwide, including Australia, Canada, Chile, Zambia, Congo, Nigeria, Ghana, Tanzania, Indonesia, Thailand, Malaysia, Zimbabwe, Brazil, South Africa, Saudi Arabia, Mozambique, Peru, Argentina, Vietnam and Kenya.

Send us your engine requirements or the component part number — our team replies with pricing and availability for your project.