Water in my oil

[3ric]

I have a 2012 Mercury 115 4-stroke. It is kinda new to me. I ran it a few times over the summer and went to change to oil (ran on muffs to warm up before draining oil) a few weeks back and there was a little water in the oil. I replaced the oil and let it set for a few days. Ran on muffs for a few mins, then drained a little (maybe a cup or two) oil out. There was water in oil again, but just a little and oil cleared up quickly. So I topped off oil and ran on muffs for about 5 -10 min. Let it set for 3 days. Went to drain a little oil out and there is a bunch of water in the oil. See photo.

What are my next steps for figuring out what is going on? Compression test? Leak down?

 

[dingbat]

Lower unit or engine block?

Picture looks to be a lower unit

 

[Faztbullet]

Thats engine oil. Make sure the t-stat is working correctly

 

[3ric]

That’s the engine oil. And I did check the t-stat. It opened in hot water as it should. Besides, that’s a lot of water in the oil and from only 10 min on the muffs

 

[Faztbullet]

Are you running FC rated oil?

 

[3ric]

Are you running FC rated oil?

Im unfamiliar with FC rating. I’m running Mercury 25-40.

 

[Chris1956]

Look for the rating on the oil bottle. The Mercury oil you are using is very likely FC-W.