I have a 1990 50 hp yamaha jet, 110 psi top 2 cyls 105 on bottom, carbs cleaned, new plugs and gapped, strong spark on all 3 cyls, idles ok, boggy out of the hole, +_ 3000 rpm @ full throttle and jerky. while @ idle pull top 2 plug wires and motor sputters, but when i pull the bottom plug wire...
