You may want to start by dropping the carb bowl and having a look. The presents of water or debris means you should flush out the fuel lines until clean and replace the filter. Have a look at the fuel cap to ensure the vent is open too. You would want to know the solenoid below the carb is working as well.

Certainly sounds like restricted fuel supply as Tom has suggested . You may also wish to add a little dry gas to the fuel with the cleaner to ensure all moisture is pushed through through the systems as well .

And make sure mounting gaskets aren't leaking, mount loose.

Walt Conner

I tried seam foam in the air intake. I wasn't expecting it to do very much, if the carb was clogged. I also poured some seafoam in the fuel tank. I pulled the fuel line off of the carb intake and turned the key. The fuel pump is working and dumped a lot of fuel out of the line.

I pulled the carb apart. It looked clean. I sprayed carb cleaner where I could. I wasn't sure how to properly clean a carb, so I just tried to spray it in all the orifices and let it soak and leak through. I fired it up and it ran fine. I'm just hoping it stays that way. It started out as an intermittent problem. I also replaced the plug and fuel filter.