---

It seems like my engine is not burning all of it's fuel. Upon running I could see a small bit of oil in the water. I am really concerned about the environment, so for me this is unacceptable. It seems to be firing on all four cylinders, so I am wondering where the problem is. My only guess is the carburetor needs an adjustment.

I can provide more details if anyone needs more info to diagnose what is happening. The engine is an older 115, probably like and 84'.