Yamaha F115 Oil in Flush Water

[Stoneman91]

I have a 2002 Yamaha F115 Four Stroke. I flush the engine immediately after trailering the boat home using the attachment near the top of the engine. I have noticed that a few drops of dark oil appear to come out with the intial flush water. Any ideas?

 

[rodbolt]

Re: Yamaha F115 Oil in Flush Water

where do you think all the exhast carbon hides ?