![]() The average marine gasoline engine runs for around 1,500 hours before requiring a major overhaul by marine rebuild specialists. Gasoline engines are made up of much more parts and, therefore, more likely to break down. Marine diesel engines are known for their longevity. 3 Diesel fuel has more energy potential per gallon than gasoline, which means diesel-powered yachts travel more with less fuel. As a result, their fuel economy increases by 20 percent. ![]() In an article published by the Universal Technical Institute, they found that diesel engines are 20 percent more thermal efficient than gas engines on average. In general, marine diesel engines have greater efficiency and economy than their gasoline-powered counterparts. For lower flammability risk, a marine diesel engine is the safer option. It gives enough vapor to create a burnable mixture in the air or the bottom of a boat. In comparison, gasoline is a flammable liquid with a flashpoint of -40☌ (-40☏). 2 Diesel fuel has a flashpoint between 52 and 96 ☌ (126 and 205 ☏). Only intense pressure and sustained flame can ignite diesel. Diesel is much less flammable than gasoline. Less FlammableĪnother advantage of diesel engines over petrol engines is safety. ![]() So, saving money on fuel is one of the most touted benefits of marine diesel engines. 1 While this may not seem like a significant difference, for larger vessels that cruise frequently, diesel ends up being the more economical choice. In an article published in, it was found than that diesel averages at $2.50 per gallon, while marine gasoline averages $2.97. While both marine gas oil (MGO) and marine diesel oil (MDO) constantly fluctuate in cost, on average, diesel cost less than gasoline. If you ever end up in a position where you are presented with such a choice, consider the advantages of a diesel engine over a petrol engine. In fact, several yacht and boat manufacturers still offer the choice between a gasoline engine and a marine engine to customers for some of their medium to large-sized models. While a growing number of boats and yachts come with diesel engines already installed, some models still come with gasoline-powered engines. There may never be a definitive answer to the petrol vs.
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