I have a mercruiser 454 bravo one. A rebuilt rochester 4 barrell. I was out today cruising when the boat all of the sudden felt like it would start to break up then it would bog down and finally stall. It would become very difficult to start and all of the sudden would start up run rough and stall. Was drifting for a minute but had to get as a major storm was approaching. It started up and took off no problem. would feel a little break up but maintained speed for 10 minutes. Approached the dock in 40 to 50 mile an hour winds and the boat stalled again got it started and ran rough made it in the slip and smoothly idled. I had this problem earlier we ran the fuel tank down changed the water seperator and it seeemed to run ok ok on a couple of long trips. The boat has been sitting for 3 weeks with only being started for a couple of minutes. An suggestions or ideas? Is this still a fuel problem? Could it be a head gasket? Temp never shot up.
