Well it started to happen when i first tried to start it up in the fall, it ran for about 5 minutes then died, can only run by pouring gas in the carbs. So i took out the carbs, cleaned them and found a extra main jet in there haha, but other than that they werent bad. i checked all the fuel lines and they seem to be clear, so then i just took out the fuel pump tonight and took it apart and it looks brand new, so i dont know if it just isnt working or whatever, but what could it be? can the pump look new but still not work??