Caterpillar C12 marine diesel engine services by 805 Marine Diesel Mechanic — mobile, veteran-owned support for boaters in Ventura, Oxnard, Channel Islands Harbor, and Santa Barbara.
Cat C12 Certified Care | 805 Marine Diesel Mechanic keeps your Caterpillar C12 running clean, cool, and efficient. From commercial workboats to sportfishing and cruising yachts, we provide factory-spec maintenance, diagnostics, repairs, and optimization throughout Ventura, Oxnard, Channel Islands Harbor, and Santa Barbara — all with mobile dockside service to minimize downtime.
Schedule Caterpillar C12 Service
Expert Caterpillar C12 Marine Diesel Engine Services
Comprehensive Maintenance
Proper C12 care starts with consistent, detail-driven maintenance. 805 Marine Diesel Mechanic performs:
- Engine oil and filter changes at Caterpillar’s recommended 250-hour intervals (10W30 or 15W40).
- Coolant and cooling system service: thermostats, jacket water pumps, seawater impellers, and heat exchanger cleaning.
- Inspection and cleaning of aftercoolers, oil coolers, and heat exchangers to maintain safe operating temps.
- Fuel system care: primary/secondary filter replacement, priming pump checks, flexible fuel line inspection.
Timely Repairs & Diagnostics
When your C12 isn’t running right, fast and accurate diagnosis matters. We provide:
- Electronic diagnostics and fault logging via Caterpillar-compatible tools.
- Injector testing and replacement for electronically controlled unit injection systems.
- Turbocharger inspection, service, and rebuild coordination.
- Cooling system repairs: pumps, heat exchangers, aftercoolers, manifold leaks.
Our mobile team services Ventura, Oxnard, Channel Islands Harbor, and Santa Barbara dockside to reduce haul-outs and downtime.
Engine Optimization
Beyond repair, we fine-tune C12 engines for cleaner, stronger, more efficient operation. The result: better throttle response, improved fuel economy, reduced smoke, and longer component life.
Caterpillar C12 Marine Engine Specifications
- Configuration: Inline 6, 4-stroke-cycle diesel
- Displacement: 12.0 L (732 in³)
- Power Range: 340–490 bhp
- Rated Speed: 1800–2300 rpm
- Emissions: EPA Tier II & IMO compliant
- Bore x Stroke: 130.0 mm (5.1 in) x 150.0 mm (5.9 in)
- Aspiration: Turbocharged-aftercooled
- Governor: Electronic
- Cooling System: Heat exchanger with seawater-cooled circuit
- Weight: 1,174 kg (2,588 lb)
- Cooling Refill: 45 L (12.0 US gal)
- Lube Oil Capacity: 28 L (7.5 US gal)
Common Caterpillar C12 Issues & Solutions
- Fuel Injector Problems: Misfires or poor fuel economy due to clogged injectors. Regular filter changes and cleaning prevent damage.
- Overheating: Salt corrosion or clogged seawater pumps. Routine impeller and exchanger maintenance stops failures.
- Turbocharger Wear: Reduced boost or smoke; solved with periodic inspection and cleaning.
- Oil Contamination: Detected through regular oil sampling and timely seal replacements.
Proactive Maintenance: Extending Engine Life
- Oil Changes Every 250 Hours
- Seasonal Cooling Flushes
- Fuel Filter Replacement
- Valve Adjustments
- Regular Load Testing
Fuel Efficiency & Compliance
The C12’s electronic fuel system and turbo-aftercooled design deliver excellent power-to-fuel ratios while meeting IMO II and EPA Tier II standards — ideal for California waters.
Why Choose 805 Marine Mechanic?
- 30+ Years of Marine Diesel Expertise
- OEM-Standard Repairs for Caterpillar engines
- Mobile Dockside Service in Ventura, Oxnard, Channel Islands, and Santa Barbara
- Emergency Response for breakdowns
- Commercial & Recreational Coverage — from fleets to yachts
Book Caterpillar C12 Service with 805 Marine Mechanic
FAQs: Caterpillar C12 Marine Diesel Service
How often should I service my C12?
Every 250 hours or seasonally — more frequently for heavy-duty use.
Do you offer mobile service?
Yes, we perform dockside Caterpillar C12 service across Ventura, Oxnard, Channel Islands, and Santa Barbara.
Will OEM maintenance improve resale?
Absolutely — documented professional Caterpillar maintenance adds real value during surveys and sales.