4/16/2023 0 Comments Most reliable inboard boat engine![]() ![]() If you go much beyond routine engine oil and fuel filter changes, cooling system maintenance, and maybe replacing a water pump impeller, you’re going to need both special tools and engine-specific training to get any job done. Why is all this important to the new engine owner? Maintenance, troubleshooting, and the inability to DIY some of the traditional tasks are the big change. The details and enforcement dates for the different categories and emission tier levels for these requirements are a bit complicated, but suffice it to say that beginning in 2016, the Tier-3 standards apply to virtually any recreational diesel-powered boat, regardless of size or engine horsepower. This is no doubt a result of the EPA Tier-3 emission requirements. ![]() What about maintenance? More and more marine diesels these days are equipped with computerized, electronically controlled “common rail” engines. Volvo Penta’s D3-220 is one of a series of modern common-rail diesels equipped with electronic controls and intended for a range of marine applications. ![]() If you’re hoping to repower with an engine not identical to the OEM engine, access to things like water pump impellers, filters, and bleed screws for the injection system are all factors to think about. Also, physical dimensions and the motor mount footprint will need to be considered in a repowering situation. Besides horsepower, the weight of the engine itself must be taken into account as part of the whole power-to-weight ratio for the entire boat. A 25 to 50 HP differential can make a huge difference in actual performance. Think of a boat as an airplane with no wings: The power-to-weight ratio is important. Keep in mind, too, that if you’re sea-trialing a new boat, it’s not going to have all the normal cruising gear you might normally be carrying on board. Often, though, there may be options within a power range, so in the case of new boats it pays to run sea-trials with the various options already installed to get a feel for whether your need for speed can be met with the standard power package, or if the optional higher horsepower setup might be a better choice. In the vast majority of cases this is something that has been narrowed down for you by the boatbuilder. How much power? One of the first decisions you might face is how much power you’re going to need. Pick a brand with professional service and parts available near your cruising waters.Make sure you'll have access to service points on the engine.Sea-trial models with different power options.The 6BT model meets EPA Tier III standards at certain speed ratings.The Four Winns Vista V375 is an example of a mid-size production cruiser that can be ordered new with either gasoline or diesel power. The 6BT and 6BTA are both in-line, 6 cylinder, 4-stroke diesel marine engines. These models can be used to replace and repower older Cummins engines or those from other manufacturers. The 6BT and 6BTA ReCon marine diesel engines from Cummins are built to at least meet or exceed the performance specifications of the original engine. Instead, Cummins ensures it meets remanufacturing standards by having it reconstructed and replacing old parts with new (as necessary) at specially authorized factories. When choosing to purchase a ReCon engine, Cummins doesn’t simply repair or rebuild it for you. ![]() ReCon engines offer buyers a great way to both save money and benefit the environment. SpecificationsĬummins 6BT/6BTA ReCon Marine Diesel Engines The QSM11 weighs in at 2,620 pounds with a displacement of 661 cubic inches. As expected in Cummins’ industry-leading engines, the QSM11 puts off little to no smoke and meets EPA Tier III standards. Its innovative four-cycle design enables fuel efficiency and reduces noise. The Cummins QSM11 offers proven acceleration and torque performance with a horsepower range of 295 to 705 bhp. Cummins QSM11 Marine Diesel Engine Courtesy Cummins ![]()
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