Computerized Marine Diesel Engine Survey Diagnosis Center
Schedule a Computerized Engine Survey Computerized Marine Diesel Engine Survey Diagnostics Center When symptoms don’t match the obvious causes (or the problem only shows up under load), computerized diagnostics is how trained technicians remove the guesswork. This page is your hub for fault-code scanning, live data monitoring, sea-trial verification, and evidence-based troubleshooting on marine diesel […]
Fuel Contamination & Filtration Issues Center
Fuel Contamination & Filtration Issues Center Fuel contamination is one of the most common causes of marine diesel performance problems — especially low power, loss of RPM, excessive smoke, rough running, and injector damage. This diagnostic center helps boat owners and technicians quickly identify filtration problems, fuel restriction issues, microbial contamination, and fuel system […]
Marine Engine Mechanical Failure Diagnostics
Schedule a Mobile Diagnostic Visit Mechanical failure is the category you never want to guess on. If your marine diesel is showing low oil pressure, overheating, knocking, sudden power loss, or abnormal smoke, the fastest path is to confirm whether the problem is a true internal mechanical failure (bearings, compression, valves) or a system issue […]
Marine Engine Black Smoke Under Load
Black smoke under load is one of the most common marine diesel engine complaints — and one of the most misunderstood. If your engine runs clean at idle but produces heavy black smoke when accelerating or pushing to cruising RPM, the engine is receiving too much fuel for the amount of air available. Black smoke […]
Marine Diesel Low Power / Loss of RPM Diagnosis
Marine diesel low power and loss of RPM diagnosis step-by-step guide serviced by 805 Marine Diesel Mechanic in Ventura and Channel Islands Harbor Book Mobile Diagnostics Go to Master Troubleshooting Guide If your marine diesel runs fine at idle but won’t reach rated RPM, feels lazy under load, or falls on its face at cruise, […]
Marine Diesel Hard Starting (Cold vs Warm Engine Diagnosis)
Hard starting in marine diesel engines is usually caused by fuel delivery problems, air intrusion, compression loss, injector issues, or glow system failure — and the correct diagnosis depends heavily on whether the engine struggles when cold, warm, or both. At 805 Marine Diesel Mechanic, we frequently diagnose hard-start conditions for vessels operating in Ventura, […]
Signs Your Marine Diesel Engine Is Beyond Rebuild
Marine diesel engines are known for longevity, but every engine eventually reaches a point where rebuilding may no longer be the smartest investment. Knowing when an engine has crossed that line can save thousands of dollars, reduce downtime, and improve long-term reliability. If you are unsure whether your symptoms indicate repairable problems or end-of-life failure, […]
Repower vs Rebuild Marine Diesel Engine
Rebuild vs Repower Marine Diesel: Which Is the Smarter Long-Term Decision? At some point, every boat owner faces the big question: Should I rebuild my marine diesel engine or repower with a new one? The right answer depends on engine condition, operating hours, budget, and long-term goals. Before making a major investment decision, start by […]
Marine Diesel No Start After Fuel Filter Change
Marine Diesel No Start After Fuel Filter Change — Complete Troubleshooting Guide Quick Technical Diagnosis Summary: When a marine diesel engine will not start after a fuel filter replacement, the most common cause is air trapped in the fuel system preventing injection pressure from building. Improper priming, incorrect filter installation, damaged seals, or fuel system […]
Engine Turns Over But No Smoke From Exhaust
Engine Turns Over But No Smoke From Exhaust — Marine Diesel Troubleshooting Guide Quick Technical Diagnosis Summary: When a marine diesel engine cranks normally but produces no exhaust smoke, fuel is typically not reaching the combustion chamber. Common causes include air intrusion in the fuel system, fuel shutoff solenoid problems, clogged filters, injection pump failures, […]