Theoretically, a well-maintained diesel may last the life of your boat. They will accept much more abuse and often deliver, if well maintained, 8,000 hours of hard work before need a major overhaul. However, many that operate under the most atrocious conditions of salt air, damp bilges, intermittent operation and pure neglect will certainly die early.ĭiesel engines are built to finer tolerances than are gasoline engines. The reason is that marine engines normally work harder and under worse conditions than automobile engines.Ī well-maintained gasoline engine run under the best conditions may well run for more than the 1,500 hours without major overhaul. Interestingly, an automobile engine may run almost twice as long (3,000 hours) as your marine gasoline engine. If these small problems aren’t addressed, they can turn into major problems which may make the last 500 hours of life difficult to reach. It is at this juncture that the engine starts to exhibit small problems. The typical gasoline marine engine will run fine for the first 1,000 hours. The number of hours that a marine engine runs is very dependent on the amount and quality of maintenance over the years. ![]() ![]() The average marine diesel engine will run for more than three times that long and log an average 5,000 hours under the same conditions. The average marine gasoline engine runs for 1,500 hours before needing a major overhaul.
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