The design of 2-stroke outboards tends to be less complex than that of 4-stroke engines. Helm Seats, Shop Downs, Couplers, Mounts, E-TEC G2 is the latest BRP refinement of this technology, developed with computer modeling tools that helped devise new combustion chamber and piston shapes, porting designs and an injector. Fishing Lures, Fishing Rod Holders & The resistance of the hull to the water is quite substantial. I however have to disagree with the article stating that the fuel delivery plays a major role in fuel efficiency of older 2-Stroke engines. Hitches, & They use the movement of the piston to open and close the intake and exhaust ports, with no need for a valve train, and less moving parts that need servicing. I've never needed anything more than my 6 gallon poly fuel tank when we went on trips of 20 to 30 miles and spent a week out on the water in the Martha's Vineyard area. Bullet Skimmer, Paint and Trolling Motors, Shop It injects a fog of fuel directly into the combustion chamber quickly, timed to prohibit unburned fuel from escaping through the exhaust port. Covers, Boat Seat Manufacturer, Boat Tables & Sockets, Marine Electrical Handles, Life Jackets & Winches, Boat Motor Supports & Guide, Boat Towers, Tow Ropes & Evinrude’s E-TEC G2 advances the tech while other manufacturers are focused on 4-strokes, © 2021 Active Interest Media All Rights Reserved. Covers, Boat Shrink Wrap This is the kind of engine found in most automobiles. 2-stroke oil is added to the reservoir and does not need to be mixed with the fuel (unless required for running-in) Autoblend was used on some 35hp to 115hp models manufactured between 1984 and 1988; Oil Injection Models . Outboard 2 stroke vs 4 stroke - fuel consumption : Evinrude (2 stroke) Mercury Optimax (2 stroke) Mercury (4 stroke) Yamaha (4 stroke) Hardware, Boat Cabin Communication, Auto Pilot Financing, Iboats The Mercury OptiMax system used compressed air to blast atomized fuel into the engine. Seats, Fishing Boat Hardware, Boat While there were a few differences, most outboards burned gas according to the following formula: Gas consumption per hour= horsepower/10 A 40 hp motor would burn 4 gallons per hour. Accessories, PWC Parts & Ropes, Boat Trailer Winches, Shop Deals, Electrical Distribution, ProMariner ProNautic I have an 8 hp Johnson 2 stroke outboard and I've never bothered to figure out the gasoline consumption. Cushions, Lexington By Tackle Junkie, November 22, 2009 in Boating. Charts & Parts, Sacrificial Anodes & Harware, Marine Nuts, Bolts, & Deals, Camping & RV Accessories, Boat Fenders, Boat Trailer This will ensure you use most of the fuel with each outing, which ensures you always use fresh gas. Direct injection works on a 4-stroke engine too, and it is a design feature of the new 425-hp Yamaha XTO outboard. Joined 14 Jul 2004 Messages 15 Location Cornwall. Hi guys, I have a Evinrude 70hp 2 stroke (1997) outboard pushing my 4.3m markham dominator. Rails, Marine Tools & Tool Cable, Marine Batteries & Hardware, Boat Seat I have a 2002, 115 2 stroke on the back of my 18' Prosport CC and recently did a 78 mile trip and found that over that trip I used 26.3 gallons of fuel for 2.96 MPG. Maintenance, Boat Cleaners & Accessories, Marine Electrical Protection, Ladders, Steps, & Detectors, Binoculars & Boarding, Paddles & I have been searching all over net and have not been able to find any reliable data on expected fuel consumption figures for my outboard. Direct injection for 2-stroke outboards first appeared in the late 1990s with the OMC Evinrude/Johnson Ficht DI system, Mercury Marine OptiMax DI and Yamaha HPDI system. Re: Mercury outboard fuel consumption Actually, the old HP/10 formula was thought up in the days when 2-stroke outboards were rated at the crankshaft. Approx 3 miles to the gallon on average, if you are lucky. Acessories, Fishing Outriggers & A new 6hp 4 stroke Tohatsu/Nissan/Mercury at full throttle uses 0.5 gallon/hour - so the same trip will need 4 gallons. & Circuit In this way, the engine gets just enough fuel to continue running at idle or low speed, and emissions and fuel economy are outstanding. Re: Fuel Consumption for 9.9 hp outboard your choices will be 3, 5, or 6 gallons. Although I'm taking a friend that isn't exactly a small fella. Most switching from carbureted 2 stokes to 4 strokes are seeing a 30-40% reduction in fuel usage. Re: Gas Consumption of older 2 vs 4 stroke engines??? Galley, Covers and Lighting, Marine Teak At that time I could troll for 2 days and still have about a gallon of fuel left in the tank. Best economy was 6.13 mpg at 3000 rpm and about 28 mph. The star of the show, however, is the E-TEC G2 system; it’s the second generation of E-TEC direct fuel injection. ACCOUNT, Find Professionals. The first thing to keep in mind is that both 4-stroke and direct injection 2-stroke outboards on average are more than 35 percent better than traditional carbureted 2-strokes on fuel consumption, according to Tom … Yamaha HPDI used a high-pressure fuel pump. The higher fuel consumption of a two stroke engine is mostly due to the fact that it has a power stroke per revolution of the crankshaft. (Note that a direct-injection 2-stroke still requires a mist of oil to be created in the crankcase to lubricate bearings, so there’s an oil reservoir required either in the boat or on the motor. Caulking, Marine Engine The fuel consumption appears to b excessive. Yamaha’s Helm Master EX brings joystick control to a new group of boat owners. GPS Chartplotter and Fish Finder Combo, Find Ventilation, Interior & Cabin Parts, Inflatable Kits, Boat Trailer If you are an infrequent user I would suggest a 3 gallon version. Holder, Anchor & Dock Hardware, Boat Trailer A 4-stroke has a sump of oil that needs to be changed annually.). Marine Battery Chargers, Shop The two-cycle delivered 4.25 mpg at 20.8 mph against a best 3.97 mpg at 20.4 mph for the four-cycle. If you consider that a 6 hour trip, with a 2 hour fuel reserve, at full throttle on the Yamaha 8 will need 13 US gallons of fuel (6 litres per hour), the consumption does become an issue. Even if I put 250HP 4-stroke on the back, my fuel consumption would still drop by 17%. Platforms, Slide Accessories, Big Jon You must log in or register to reply here. Tubes, Shop Accessories, Boat Lift Canopy Seats, Pontoon Boat Seats & In the U.S. market, BRP, the parent company of Evinrude, is alone in remaining devoted to the development of 2-stroke outboard motors. JavaScript is disabled. Another advantage of direct injection is its ability to operate in stratified mode at low engine speeds, when a small column of fuel vapor is injected into the combustion chamber adjacent to the spark plug, and the rest of the cylinder is filled with air. Zincs, Generator A 4-stroke engine has moving intake and exhaust valves, which can seal the combustion chamber until all the fuel is burned and then allow it to escape before an incoming charge of fuel and air enters the chamber. & Accessories, Pontoon Bimini Biminis, RV & Trailer Locks, Boat Deck The Right Fit, Shop By your boats Gel Coat Match, Shop Furniture, Boat Seat Pedestals & Breakers, Power Packs & Jump Liters/Hour. Dollies, SportsStuff Great Big Fasteners, Boat Windshield Shop Savers, Boat Trailer Guides & Tackle Boxes, Fishing Bait & RPM. Greenline’s new NEO dayboat has the option of internal combustion or electric engines. Increased Pollution: Due to the addition of oil to fuel, this type of engine is also more polluting in older 2-stroke models. Deals, Boat Seats Jacks, Boat Trailer Brakes & Rafts, Paddle & Live Bait Direct injection retains the 2-stroke advantages while producing acceptable emissions. That devotion recently resulted in the new series of 1.9-liter Evinrude outboards with the latest E-TEC G2 direct injection technology. Starters, Marine Solar Power You can find more information on how to estimate fuel consumption by using the brake specific fuel consumption method. Yep it's a 2 stroke. The new outboards promise outstanding mid-range torque and low emissions. For outboard motors you can assume the brake specific fuel consumption will be in the range of 0.55 to 0.6 pounds of fuel per horsepower per hour. Any idea on how to get a rough theoretical caclulation of fuel consumption for a 5hp Mariner 2 stroke pushing a 22ft yacht with c.1000kg displacement? Covers, Boat Wiring & The integration of Volvo Penta and Seven Marine technologies makes it possible for outboards to push big boats more efficiently. Parts, Boat Tubing & Maintenance, Pumps and Boats, Propeller Parts & Deals, Trailering & Dock, Anchor Chains & Honda 5hp Outboard, Boat At the recent Yamaha media intro, for example, I ran a Skeeter SL 210 powered by the 225-hp F225TLR four-stroke. Holders, Cabin Accessories & Plumbing, Fresh Water Boat Hardware, Marine Seats, Offshore Boat These engines meet year 2006 emission requirements, and deliver fuel economy … Forums, Find Transom When the throttle is advanced, the DI system reverts to filling the entire combustion chamber with a homogeneous fuel/air mixture. Screws, Boat Handles, Pulls, Waxes, Boat Cleaning Blocks, Marine Thread starter ecb; Start date 7 Feb 2005; 7 Feb 2005 #1 ecb New member. Storage Mercury, Yamaha and Suzuki also started developing outboards with 4-stroke engines and electronic fuel injection in the intake tract, a setup that also met emissions regulations but that resulted in an engine significantly heavier than a 2-stroke of the same power. 90-HP x 0.55-lbs/HP-hour X 1 hour = 49.5-lbs Gasoline is usually about 6.25-lbs/gallon, so in terms of volume. 2-Stroke Outboards Pros. Galley, Barbeque Marble, Engine Varnish, Marine Adhesives, With a 7.6-liter V12 powerhead, contra-rotating propellers and a steerable gearcase, it is the company's largest outboard ever. The result, according to BRP, is a motor that offers outstanding midrange torque and low emissions, with fuel economy that may be 100 percent better than a 4-stroke outboard’s at trolling speed. 9.9 hp - 15 hp - 20 hp - 25 hp - 40 hp - 50 hp - 60 hp - 75 hp - 90 hp - 115 hp - 135 hp - 140 hp - 175 hp - 190 hp - 200 hp - 220 hp - 225 hp - 250 hp - 260 hp - 300 hp - 310 hp - 320 hp - 350 hp - 375 hp - 405 hp - … & Sonar, Trolling Bilge Pumps, Shop Wells, Toilet & Waste Meters, Marine Electrical Panels You can figure the fuel burn of a classic carburetor two-cycle motor using a brake specific fuel consumption (BSFC) about 0.55-lbs/HP-hour at best. Watch the fuel economy of the 2 stroke outboard engine - http://www.boatmotors.com/outboard/evinrude/ Battery Charger, Marine Audio & Accessories, Marine DC Power Plugs The pros call it "brake-specific fuel consumption." AN & Rings, Prop Nut Kits & The BRP E-TEC system uses electromagnetic “voice coil” technology to activate a steel ram that pushes the fuel at 800 psi through outwardly opening swirl nozzles into the engine, while atomizing fuel down to 25-micron droplets that are easy to ignite. Biminis, Paint and A two-stroke 90 at 4,000 RPM on a 1,600-lb boat will achieve planing speed just fine. This has to be accomplished in a fraction of a second. Fuel Consumption 2008 Yamaha 90 Two-stroke Outboard Fuel Consumption 2008 Yamaha 90 Two-stroke Outboard. Copyright © 2019 IBOATS. Smoke Boat Repair, Boat Paint & Insurance, Boat ghh3rd: in my expperience with two-strokes, their fuel economy will get better as the motor breaks in and you switch to the normal oil mix ratio. Boat, Boat Buyers Now, Shop This makes it important to know that gasoline weighs about 6.1 pounds per gallon and diesel fuel 7.2 pounds per gallon. PFDs, Roof Racks, Carriers, This new tower of power redefines outboard propulsion for large boats. The result, according to BRP, is a motor that offers outstanding midrange torque and low emissions, with fuel economy that may be 100 percent better than a 4-stroke outboard’s at trolling speed. In a 4-stroke, direct injection improves power and efficiency. Parts, Rule 1500 GPH Automatic Less Fuel-Efficient: Older model two-stroke outboards produce uniform power, but the engine is not as fuel efficient as a four-stroke. Comparing fuel efficiency is a good starting point. Most of the time we sailed when the wind was up. That's what some manufacturers trumpeted a year or two ago. for Sale, Buy A Login, Boats I used to use a 6 gallon fuel tank for my trolling motor. Lights, Boat Trailer Bilge Pump, Tires, Rims, & Hub Steve: joenewton: posted 08-03-2003 07:38 AM ET (US) Shelters, Boat At 4500 rpm, economy dropped by 30 percent, to 4.33 mpg, and it dropped by 60 percent to 3.82 mpg at 5500 rpm. Boat Gel Coat - Spectrum Color, Pumps and Oil requirement. Dock, Cabin and You are using an out of date browser. The tank holds 45 Litres and I can only get about 25km out of a tank. Kits, Seadog Stainless Steel Cup Tables, Minn Kota All rights reserved. The Evinrude 115 H.O., Evinrude 140 and Evinrude 150 share a three-cylinder power head that incorporates a number of design features previously available only on V-6 Evinrude E-TEC G2 outboards, the first of which debuted in 2014. … Systems, Lowrance Hook2-4 GPS I will admit I do not follow the 150 & up engine sizes because they are of no interest to me so perhaps there is a wider spread in that category. 115 2 stroke fuel consumption But, I have a question. This article originally appeared in the August 2019 issue. Plumbing, Anchor Accessories, Electronic Navigation Calculating fuel consumption - 5hp Outboard. I know a couple of guys running 225HP Hondas that are getting even better numbers than the Yammi F225. Deals, Dealer All, Boat Bimini Tops, Bimini Top Products, Carbon Monoxide & Boat, Sell A Video, GPS Chartplotters & High Back Reclining Helm Seat, Cabin and It may not display this or other websites correctly. A traditional 2-stroke engine is much less complex. Category, View Telescopes, Covers and Conventional 2-stroke models - Certified TC-W3 2-Stroke Outboard … Oars, Wakeboard, Wakesurf & Switches, Shore Power & AC CREATE For a better experience, please enable JavaScript in your browser before proceeding. Deals, Paint & Maintenance Axles, Boat Trailer Tie Boats, unlike autos, are constanly "under load". Best economy for the two-cycle was achieved at 27.9 mph: 4.45 mpg. Anchor Box Anchors, Fishing Rod & Reel Because it does not require valves, a camshaft and many other parts, the 2-stroke is relatively cheap to manufacture and lightweight. Outboards, Shop Systems, Marine Plumbing Protection, Dock Storage & Gallons/Hour. Supplies, Boston Whaler, 1972-1993, Sealant, & Racks, Fish Finders, Sounders I know for a fact that I use 2.5 gallons of fuel per 8 hours of trolling. Acessories, Fish Cleaning Grills, Boat Drink Software, Digital Drink Holders, http://www.outboard-motors-and-boating-geraldton.com/support-files/fuel-efficiency.pdf, http://www.gradywhite.com/228/performance_data/1/F200, http://www.gradywhite.com/226/performance_data/1/F250. https://www.activefisherman.com/boat-specs/boat-fuel-economy Pumps, Livewell Aerator Pumps Direct injection- savior of the two-stroke outboard. Approximate Fuel Consumption Chart: Model/HP. The 1.9-liter models are not quite as feature-laden as the V-6 Evinrudes, but are available with integral power steering, standard digital throttle and shift control, and a 1.9-gallon oil reservoir below the power head. A pair of balance gears cancels the primary vibration of the triple-cylinder engine. Fuel injected and four-stroke outboard motors get considerably better fuel economy. Covers, Other Instruments, VHF Radios & In that cycle, however, a significant amount of unburned fuel can escape through the exhaust port, resulting in sky-high hydrocarbon emissions (evidenced by the cloud of smoky exhaust many of us recall from the past). & Covers, Boat Cover It uses the moving piston to open and close intake and exhaust ports as it pumps a mixture of fuel, oil and air from its crankcase to the combustion chamber. A third set of tests compared a 135-hp, two-cycle DFI outboard against a 130-hp, four-cycle outboard on identical 20' boats. Which is best for you? Terminal 30 (2-str). Rollers, Boat Trailer Deals, Electronics I don't have a 15hp 4 stroke but I do have an Evinrude 8hp 2 stroke. Biminis, View Each allowed a 2-stroke engine to meet modern exhaust emissions regulations. All, Anchor & So, if you use this on a later-model outboard rated at the prop, the value you come up with is gonna be a bit on the low side. Combos, Fishing Tools & Parts, Wash Down So, the recreational boating market has voted for 4-strokes, but BRP, probably to the delight of Ole Evinrude, continues to wave the 2-stroke banner. Ski, Wakeboard If you compare apples to apples, 200HP to 200HP you?re looking at 38% decrease in fuel consumption when going from a 2 stroke carb to a 4 stroke. Fuel economy could be 100 percent better than a 4-stroke outboard at trolling speeds. My boat cruises happily at 25 mph. Vinyl, Floating Boat Hardware, Boat Seats by Maintenance, Fiberglass & Epoxy For years, we computed outboard gas consumption easily.

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