Floats control fuel level with a needle / in a brass fitting.----Called a float valve.-----Jets meter fuel into the airstream going through the carburetor.----When you spray fuel into a carburetor the motor MUST respond somehow.
There may be a nylon bushing at the top and bottom.----Lift the gear art top.---Smear some grease.---Grease will work it's way in.----Lay motor on it's side and spray some lube near bottom.
What trouble shooting has been done if any.-----Was the fuel pump tested BEFORE it was replaced ?---Pressure regulator.----Lift pump ? ---Oil pressure ----Etc , etc.----Some times a trip to a SUZUKI dealer might save you some beer tokens.
Your local hardware store may have brass pipe fittings that will work.---Depends on how much room between carburetors I guess.-----Be an easy fix on my work bench.
Look for------haulover inlet----Videos of various boat performing in big waves.------Bowriders fill up faster than bilge pump can pump water out.-----That boat is meant for small lakes and small rivers.