stinger- as long as you kep your ped up and running tip top, like i advised your dad the correct oil to use and what to mix it at, and also you should probably clan the carb , again.. your gas tank was kinda dirty, and get a new fuel filter...
also try advancing your timing... this can all be found in the wiki, and can be done with a flat head screw driver, and maybe a pailr of needle nose pliers... oh and the the bottom bolt on the carb is attached to the bowl itself so you dont really need a 13mm wrench to take if,just a strong grip on the bowl.... hit me up... 239-244-5498
eric