iam at a loss i bought a boat from a fella and it ran pretty good the first time out.the sec time i notice a big loss in power at wot, what i have done since, replaced fuel pump,replaced both coils and condencers, checked points look great and regaped, cleaned carb put freash fuel in , replaced fuel connecter. the first time we checked it, the bottom cylinder was intermittent, when we unplug the top cylinder while running it has no change, but when we unhook the bottom cylinder the motor dies. we have checked the cutout switch by unhooking while running no change. i am at a complete loss have no idea where to go from here. my boys really want to go on the boat. wondering if anyone hase any pointers. PLEASE! thank you so much for your time.