I just got a 9.9 evinrude '82 works great. Now I also have a '79 that im thinking about rebuilding. Now it has very little compression and we took off the head and the exhaust plate, the rings are free and no scoring on the walls it's actually very clean in side and in the head. I was thinking about rebuilding it with a 15hp carb. Im pretty new to this and have a shop available (work). Just wondering if anyone had any tips or suggestions about the compresion and/or the 15hp upgrade. Thank you p.s. caught a 6.4lb largemouth yesterday a pb for me!