I have a 92 Johnson 25 hp motor that I have been working on. I got it in and it had been bogging down when accelerating. Motor fires up easily, idles fairly well and goes slowly with no issues. The problem is when trying to accelerate to get on plane it will rev up for a few seconds and just suddenly cut out and sometimes will surge and jerk and other times will stall out. It is for sure a fuel starvation issue. The carb was rebuilt and is for sure spotless, tank and line has been swapped for one that is known to be good and makes no difference. Fuel pump has been replaced. My next step is going to be replacing all the small lines from the carb/primer. Anything else I should be looking at? The one thing that worries me is the fitting on the front of the bowl of the carb seems to have somehow been lost or broken sometime before I got the motor. It is currently a small plastic pipe that is threaded into the bowl. Would sucking a small amount of air from any of the small line connections cause these symptoms?
