hello,<br /><br />I'm new on this forum and i have a question..<br />I recently bought a boat with a 140 hp OMC cobra inboard (1991) this boat is about 5,5 meters long and weighs about 1000 kg.<br /><br />At full throttle te engine makes about 6000 rev's but the speed stalls at about 55 km/h (35...