Reply To: Newer Yamaha 50 HP 4-stroke question

[Don]

Wish I could help but have zero experience. I have also heard that these four stroke carbs are complicated and get plugged easily though. Try not to dig too deep, the problem is most likely something simple, use basic common sense inspection techniques that would apply to a two stroke multi carb outboard.
Bill: Why is it that you can’t use the “oil can injection technique” on these four strokes? Do they have some sort of complicated intake that won’t allow access to each individual carburetor throat?