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Honda introduced its four-stroke engine in the 1970s. The four-stroke engines make less noise, are more fuel-efficient and generate fewer greenhouse gases. According to Honda, four-stroke outboards make 50 percent less noise with 50 percent greater fuel-efficiency and 90 percent fewer greenhouse emissions than its two-stroke counterparts. All of Honda's current models integrate the four-stroke technology into their design.
60-HP Power Thrust
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This engine's single overhead cam has 12 valves and three cylinders, for a ratio of four valves per cylinder. Its 60 horsepower is generated at 5,500 revolutions per minute (RPM), with a full-throttle RPM range of 5,000 to 6,000 RPM. The Power Thrust has 2.9-inch bore and 3.1-inch stroke. The water-cooled engine uses an electric starter with a 27-ampere (amp) alternator. It has a 2.33:1 gear ratio. The engine is 16.4 inches long. The L-type weighs 256 pounds and stands 20 inches tall, while the X-type weighs 270 pounds and stands 25 inches tall.
Eight Horsepower
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The smaller, eight-horsepower engine is a good fit for aluminum fishing boats, according to Honda. This water-cooled engine gets its eight horsepower at 5,000 RPM with a full throttle range of 4,500 to 5,500 RPM. It has a displacement of 222 cc, with a bore of 2.3 inches and a stroke of 1.7 inches. It has a single overhead cam, with two valves per cylinder. The electric-recoil starter system uses a 12-amp alternator. The engine is 13.6 inches wide. It comes in three configurations. The S-type weighs 92 pounds and stands 15 inches tall. The L-type weighs 98 pounds and stands 20 inches tall. The X-type weighs 107 pounds and stands 25 inches tall.
105 HP Jet-Drive
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This water-cooled, dual overhead cam engine has four valves per cylinder, for a total of 16 cylinders. Its 105 horsepower is reached at 5,500 RPM. The full-throttle RPM range is 5,000 to 6,000 RPM. The engine has 2,354 cc of displacement, with a bore of 3.4 inches and a 3.9-inch stroke. The electric starter uses 51 amps. The engine is 22.8 inches wide, weighs 472 pounds and stands 25 inches tall.
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