Quote Originally Posted by majflyboy View Post
Could be bad gas, try that first.
I drained all the gas out and filled with new gas and drained fuel bowls and sprayed down full of carb cleaner and added stable treatment. All last week after doing all that it would run good with water hose. Thought it would be ok. I think I might run a strong dose of seafoam through it before having the carbs reworked. It's a 99 model 50 hp merc with 3 carbs.