5 hp 4 stroke has water in oil.

[Al Goehring]

I have a 5 hp Nissan that had water in the oil last fall when I changed oil. Could this be a head gasket? Or something else?

 

[pvanv]

Could be a head gasket. I would change the oil a few times and see if the issue recurs.

 

[Alumarine]

How much water?
Did it look like chocolate milkshake?