![]() ![]() For more operating tips or to explore boats for sale, come see us at La Canne’s Marine in Faribault on Wells Lake, just 50 miles south of Minneapolis and St. We hope you take steps to conserve fuel, for your wallet and for the planet. Use the engine’s power trim and trim tabs to achieve correct trim. Optimal trim is typically two to five degrees bow up. A bowdown boat is plowing and difficult to steer. When a craft is trimmed with too much bow up, it drags at the stern. Vessel trim is all about controlling the amount of drag on the boat. Repair the blades or replace the propeller as needed - it'll save you money in the long run. Pristine, well-balanced prop blades improve fuel economy, and they put less stress on your motor. Clean debris from your hull regularly, especially if you store your boat in the water. Winterize and de-winterize the outboard motor before and after storage. Follow the recommended maintenance schedule and get a full service and tune-up at least once a year. Maintaining a motor ensures that it runs efficiently. Why burn fuel unnecessarily? If you are waiting for your turn to dock or chatting with a neighboring boat, turn off your engine. Go through your boat's compartments regularly and jettison unneeded stuff. While you shouldn’t skimp on the essentials, try not to bring too much extra, heavy, "just in case" items. Limit Weight OnboardĮvery extra pound onboard makes your engine work harder and suck more fuel. Save more fuel by considering tides, currents, and predicted winds in order to plan the most fuel-efficient route. Try to avoid days with heavy winds, large waves, and other issues. In rough waters, boats slow down and come off of the plane, which reduces outboard motor fuel economy. Simply boating at 75% can result in up to 50% fuel savings! Boat In Good Conditions An outboard has a higher power-to-weight ratioits lighter than a sterndrive of similar performance capability. Slow DownĮngines generally use fuel most efficiently when performing at about 60% to 80% of rated output, rather than operating at full throttle. If you have any questions or want to explore boats for sale, come over to La Canne’s Marine in Faribault on Wells Lake, just 50 miles south of the Twin Cities and serving all of southern Minnesota. Here are some simple ways to make every gallon last longer. You’ll save money, you’ll pollute less, and you’ll have a greater range on a tank. Even putting a fine pitch prop on, the rotation speed is too high to be optimum, so there are higher losses converting rotary motion to thrust.There are plenty of good reasons to improve your fuel efficiency. Gearbox has smaller gears to be compact, running faster so greater lossesīut after all those, this is the big one.outboard engines are designed to push a light boat fast, inboard a heavy boat slowly, so the prop shaft speed on the outboard is faster. Outboard engines have to be compact so smaller sized air input & exhaust pathways than optimum. Outboard power measured at prop, inboard at output shaft before the gearbox, so comparison of equal power not quite true to detriment of outboard Outboards higher revving so increased friction losses ![]() Here are some reasons why outboards of the same power use more fuel than inboards.Ģ strokes lose a significant proportion of their fuel unburned, but that's well known, so I'll look at losses from 4 stroke outboards.ĭiesels fuel injected, small outboards carbureted, so fuel metering not so goodĬylinder capacity of equal power outboard is smaller so less thermally efficient because of surface area to volume ratio of combustion chamber greater Also, being aware of the quality of your fuel is very important too. With most modern engines whether it be inboard or outboard the fuel economy is comparable. This seems to be a thing of the past though. But the 10hp Nanni does it for about £6 on red diesel with no bleeding ears, far fewer pot lines more reliability No explosion risk and very little fire risk, better electricity generation - just, better weight distribution, easier and legally stored fuel and more prop drag.įurthermore, being quite light, it's only a tiny bit more hassle to remove it from the boat compared to the o/b in a well with controls connected to the boat. There was a time when inboards did drink a lot more fuel than outboards. The 9.8hp Tohatsu 4T would do that same journey for about £18. Then when you consider that it took me some eight hours to motor from Shoreham to Bembridge, that worked out at about 6.5 gallons with my 8hp 2T, costing today about £33. When shopping for a new boat or marine engine, fuel consumption provides a major. A rule of thumb I use is 10hp 2T o/b uses a gallon per hour, a 10 hp 4T o/b half that and a diesel inboard half that. Yamaha Outboard Fuel Consumption Liters per hour LPH Factors such as.
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