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Thread: Frothy oil at exhaust

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    Default Frothy oil at exhaust

    I'm not sure what the name for these two ports are called, but there is frothy oil where the water discharges. I do a lot of idling so just want to see if this should be happening or if I have some underlying issues. This is on a Johnson 115, I changed the water pump a few days ago and noticed a lot of real thick oil at the base of the exhaust housing at the lower unit as well. Just hoping this isn't a sign of a blown head gasket or something major.Name:  IMG_20220117_103256.jpg
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    4 or 2 stroke?
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    It's a 2 stroke. It has the vro system that I deleted. I use it just for the fuel pump. I mix my own oil . I wonder if I may have too much oil or the brand oil that I'm using. I use Pennzoil if it matters

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    That is what I am thinking. Unburnt oil mixing with water in the exhaust. I remember fooling around with 2 stroke dirt bikes years ago. When you got the oil a little rich it would drip out of the joints in the exhaust. Long as it isn't fouling the plugs or making a huge mess I would run it. Do a lot of idling doesn't keep it blown out.
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    Plugs are not getting fouled they are actually pretty clean. Makes me feel better about it, I was hoping it wasn't something like a head gasket. I do a lot of idling around scanning for structure

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    Quote Originally Posted by huntersdad View Post
    Plugs are not getting fouled they are actually pretty clean. Makes me feel better about it, I was hoping it wasn't something like a head gasket. I do a lot of idling around scanning for structure

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    Every once in awhile while doing your idling around just put in neutral and use leaver to run idle up to about 1500 and let run for 4-5 minutes to try to keep more of it burned out. That might help some. But no fouling issues I wouldn’t mess with oil mix. Not really going to hurt anything as is.
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    Done a compression test yet?

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    No I have not, is there anything I should be concerned about?

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    50-1 oil mixture I assume?
    You should also run the engine for at least 5 minutes at WOT.
    After idling around all day you probably arenít getting the engine up to operating temp.
    Rust take a nice WOT run before putting it on the trailer.


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    It is 50:1, I took the boat out today to do some scouting and did open it up for a brief moment. It was far to cold for much more lol.

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