There are a hundred mistakes that could cause your problems, none of which are complicated, but all require going in an orderly sequence and minding the details. Your first error from your description is the basic pump timing, it is NOT pump mark at Z1. Rotate the engine at least one full revolution (this gets all the slack of gears chains and belts settled) Now rotate engine until you see the ignition rotor line up with the #4 spark plug wire in the cap. Now rotate about 1" further on the crank pulley until you see the FE mark line up at the case half split, NOW check to see if the pump gear lines up with reference mark. Depending on what that does we can go further or quit.