Hello, I bought a new Tohatsu 3.5 4 stroke for my sailboat about 2 months ago. It always starts right up but after letting it warm up a couple of minutes and pushing the choke back in it struggles to remain idling. If it dies completely, it's almost impossible to start back up. It seems like the engine is flooding but that's just a guess. I always use fresh gas with Sta-bil in it. Thanks for any suggestions.