I  replaced carb after market easy job started it on full choke and primed  it 5 pulls and it ran for 45 sec then died did this again and it repeated  I added a new inline filter (arrow to carb) and new high octaine gas with fuel additive however I did not have gas line clips on the filter I am stumped  can anyone give me some ideas of what to look for thanks OB
 

Try it with the fuel cap loosened, the tank may not be vented. Aftermarket carbs can be hit or miss, at the price quality control is lacking.