ill see if i can lower the tank and see if there is a access for a internal pump, but so far i havent found any wire or hosing that leed to the top of the tank at all, my manual says there isnt one installed just the external pump.
Ive already rebuilt the carb and the accelerator pump as well as other diaphragms were replaced, i had talked to a carb mechanic a while back and that was one of the things he suggested.
Those specs are the specs from the factory, i dont have a way to test exactly what it is doing at the moment due to lack of funds.