I have a few questions if you guys will humor me. 1. I want to clean out my gas tanks and replace the fuel valves. on my bobcat everything is bolted down. how do i pull the tank? and how do i pull the valves? 2. how do pull the covers off a 15hp kohler command? i have all of the side screws out. 2. Can I put an electric start on my 15hp kohler command that is off of a 14hp kohler command on a crapsman tractor? If I can how do i do it? 3.I want to make a 7hp ohv intek briggs rev higher. if its possible how can i do it? thanks in advance for any help! greatly appreciated, buzz.