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Yacht Engine Overheating at Cruise RPM

Twin Caterpillar marine diesel engines in yacht engine room diagnosed for overheating at cruise RPM by 805 Marine Diesel Mechanic in Ventura California

Yacht Engine Hard Starting When Cold (Complete Marine Diesel Diagnosis Guide) If your yacht engine is hard to start when cold, you are dealing with one of the earliest warning signs of system inefficiency in a marine diesel engine. Cold-start problems are rarely isolated—they are a combination of fuel delivery issues, compression loss, injector inefficiency, […]

Marine Diesel Overheating Under Load But Not At Idle

Marine diesel overheating under load diagnosis showing clogged heat exchanger core inspected by trained technician at 805 Marine Diesel Mechanic Ventura Channel Islands Harbor

Marine Diesel Overheating Under Load But Not At Idle (Root Cause Guide)   If your marine diesel engine runs cool at idle but overheats at cruise or under heavy throttle, the problem is almost always related to restricted cooling flow, increased engine load, or airflow limitations affecting combustion efficiency. At 805 Marine Diesel Mechanic, this […]

Marine Engine Heat exchanger clogging symptoms

Marine diesel engine heat exchanger plate style before and after cleaning showing clogging symptoms and restored flow serviced by trained technician at 805 Marine Diesel Mechanic Ventura Channel Islands Harbor Santa Barbara

Heat Exchanger Clogging Symptoms — Marine Diesel Diagnosis Guide Quick Technical Diagnosis Summary: A clogged marine diesel heat exchanger reduces cooling capacity by restricting raw water flow through the tube bundle. Early signs include rising temperatures under load, intermittent overheating, weak exhaust water discharge, and temperature spikes after impeller failure. Heat exchanger clogging is often […]