1988 3.0 Murcruisor Carburetor?

Q: When we where cruising on the lake the other day the boat started bogging down and going about 10mph. Sounds like the carb is sucking air. Spayed some carb cleaner and changed the plugs for good sake but still having the same issue. ANY ideas. Thanks no water sep. it runs great when out of the water but when in the water no power at all. The carbs are making loud noise when i take out and cuts in and out.

A: Not much info to go on, do you have a water seperating filter? if so, check for water in the fuel. If not, get one. Can you give a bit more detail?

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