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Old 12-03-2011
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http://l-36.com/Atomic4/a4manual2.pdf is the manual for the A4. They recommend an RPM of 2000, which is stated to be 80% power. At this RPM the horsepower is 15 to 16.2 depending on engine model. This is the horsepower needed for a boat weighing about 10,000 pounds if you figure 3 to 4 horsepower per ton.
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