CAT C9.3 C9.3B Marine Engine Assembly Complete Diesel Motor for Boat Excavator

01.  Product Overview

This CAT C9.3 Marine Engine Assembly is a complete, ready-to-fit diesel power unit for boats, workboats and excavators. Supplied 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 matched to CAT reference tolerances, so it bolts straight onto the same mounts, manifolds and control interfaces as the original power pack. It is a practical, cost-effective choice for shipyards, fleet operators and workshops that regularly source Excavator Engine Parts and marine power solutions for the C9.3 and C9.3B platform.

With a 9.3-litre, Inline-6, turbocharged and aftercooled architecture, the C9.3 is trusted for continuous heavy-duty duty cycles. Whether you are repowering a tug, refitting a workboat or rebuilding an excavator, this 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

Every internal group is listed below with its reference part number in both the dash and non-dash format, so you can cross-check quickly against your own parts list. The main Engine assembly is supplied complete for the CAT C9.3 / C9.3B platform.

• Cylinder head assembly — 293-4669 / 2934669, 497-5508 / 4975508, 324-8188 / 3248188
• Crankshaft — 255-8664 / 2558664, 516-0393 / 5160393
• Cylinder liner — 469-5313 / 4695313
• Piston & liner kit — 357-0447 / 3570447, 276-7476 / 2767476
• Fuel injector — 456-3493 / 4563493
• Turbocharger — 575-9942 / 5759942, 424-3429 / 4243429, 20R-3861 / 20R3861
• Oil pump — 423-4722 / 4234722
• Water pump — T432553
• Thermostat — 377-3016 / 3773016
• Alternator — 344-5081 / 3445081
• Valve lifter — 575-4995 / 5754995
• Oil filter — 500-0483 / 5000483
• Fuel water separator — 500-0481 / 5000481
• Gasket assembly — 280-4322 / 2804322, 209-7293 / 2097293, 262-1940 / 2621940
• Regulating valve coil — 323-9531 / 3239531

03.  Performance & Specifications

04.  Why Buy This C9.3 Marine Engine

• Complete drop-in unit — a single Engine assembly covers the entire power pack, cutting sourcing and assembly time for Excavator Engine Parts and marine rebuild projects.
• Matched CAT part numbers — every component is cross-referenced in both dash and non-dash format, such as 293-4669 / 2934669 and 575-9942 / 5759942, for fast verification.
• Matched C9.3 fitment — bolt-on compatibility with original mounts, manifolds and control interfaces.
• Electronic control — ADEM electronic governor for stable output, responsive load handling and efficient fuel use.
• Flexible B2B supply — sample orders for validation and full container loads for distributors, shipyards and service fleets.
• Heavy-duty build — a 9.3 L Inline-6 platform 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 C9.3 Marine Engine Assembly and Excavator Engine Parts 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.