I just bought a boat with a 2004 Honda 4 stroke tiller steer motor. The motor is super clean and has barely been used. However, it has trouble starting and running at idle. Probably the carbs, but I was wondering if changing the spark plugs and getting new fuel and new fuel lines would possibly help. He didn't have a fuel water separator on it, and just the fact that it hasn't been ran much leads me to believe that it may need some carb work done. ANY help would be greatly appreciated.