1988 Mercury 115 inline six fuel issue

[Ak1081]

Issues: engine will start up and idle great, will not go above 1500 rpm on the water. The engine will bog then stall out.
I replaced all filters, fuel lines, rebuilt the fuel pump, removed the fuel tank which I drained completely cleaned out, dried then put fresh new fuel in. All cylinders have good compression.
Dropped back in the water and the same issue, appears as if there is still a lack of fuel pressure after the fuel pump.

 

[Chris1956]

it is likely the carbs are set too lean to allow acceleration. Open the top carb 1/8 turn and try to accelerate. Follow with mid carb and then bottom carb, testing acceleration after each adjustment. Repeat entire sequence as necessary.