I just started my Mercruiser 4.3 carb in my driveway for the season yesterday. It is my first spring with the boat. I was expecting that since it is not EFI, it would be a bear to get running. It started instantly and ran perfect. I just wanted to say that the 4.3 Mercruiser beat my expectations and my common sensical thought and regret for not being to locate an MPI when I boutht last year. On the plus side for those 10 or so minutes, it sounded like a thru hull.