hey adam
i removed my primer on my 75cc tank.
what you have to do is cut off the shaft as close to the tank as you can.
the rest of the primer will fall into the tank. then you just have to fish out the
parts from inside the tank. i glued a screw in the hole where the primer used to come out
of the tank. when i washed out the tank in water and checked to leaks. i got well over 3 gallons
thur my tank without any problems.