9.9 johnson to 15 hp conversion
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Posted by jerry (220.127.116.11) on September 20, 2005 at 12:07:51:
I have a 1981 Johnson 9.9 hp and I am trying to convert it to a 15 hp. I have purchased the 15 hp carb and have installed it and after checking the performance of both the 9.9 with the 9.9 carb and the same motor with the 15 hp carb, there is no difference. I used a gps to clock the speed and the speed is the same (17 mph) and the rpm is the same.
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