Briggs & Stratton Flat Head 5Hp Powered Go kart

i recently picked this engine up from a friend i knew it ran ok but i didnt expect to have so many problems with it at this time it will run but it cuts out i thought i had the problem fixed. i recently found that the pulsa jet carburetor was the problem i have ordered a rebuild kit for that engine. here are some videos of what i have done so far.