Use a higher amperage fuse.
I.E. if the ignition requires a 1amp fuse, put in a 2amp fuse.
The fuse keeps blowing because there is to much amperage being put through it causing the metalic filliment to melt.
If the fuel pump in the gas tank is shorting out then you just keep on trying to get it to explode! If you don't know what your doing then you shouldn't keep on plugging in a new fuse to help it to fry worse! As for me I would use my volt-ohm meter to check the system and you should do the same if you know how. You need to get it into a shop that won't screw you over! Good damn luck on that one!