Oily gas from the exhaust

[Macwanted84]

Hey guys, I got it fired up for the first time on the muffs but the attached picture shows what my grass looked like afterwards, and then it continued dripping overnight and I’m pretty sure was still pulling gas from the tank too…any thoughts?

[Be Free]

I'm going to say you have a leak in the seal that's right behind the propeller.

You did not mention blue smoke, rough running, or fouled plugs and you still see a leak after the engine is turned off. Unfortunately, that seal does double duty. It keeps the lower unit oil in and it keeps water out. If I'm right you may have contaminated oil in the lower unit.

It may help to know the make and model of your engine.

Let's start out by determining where the oil is coming from.

Pull the plugs and look for burnt or unburnt oil on one or more plugs.
Is the oil level on the dipstick somewhere near normal? Is there any signs of water or contamination in the oil? Does it seem unusually thin?
Is oil dripping out of the lower unit anywhere (like around that oil seal)? Is there any sign of contamination in the lower unit oil?
Can you smell gasoline in the lower unit oil? Does it seem thinner than usual?

[Russ]

Pull the plugs and look for burnt or unburnt oil on one or more plugs.
Is the oil level on the dipstick somewhere near normal? Is there any signs of water or contamination in the oil? Does it seem unusually thin?
Is oil dripping out of the lower unit anywhere (like around that oil seal)? Is there any sign of contamination in the lower unit oil?
Can you smell gasoline in the lower unit oil? Does it seem thinner than usual?

^^^ This

[leefrankpierce]

2 stroke or 4 stroke?
A 2 stroke uses the fuel as lubrication, so the fuel has oil in it that ends up being part of the exhaust.
I would think nothing of a 2 stroke doing that.
That is why 2 strokes are no longer allowed on some lakes.
4 stroke, that is a different beast and should not do that.

As far as it continuing to pull fuel, that is why I disconnect my tanks when not actually using the motor.
Fuel tanks are higher than the motor. Fuel runs down hill.

[Macwanted84]

Thanks guys. Yeah, it’s a two stroke Evinrude60 etec. The gas running downhill is a common sense answer I probably should’ve thought of. I am worried about the amount of oil that came out. It had full two-stroke when I purchased it a few weeks ago. I wouldn’t want to be that guy on the lake who has a sheen like that following me and polluting wherever I go, but it makes sense.

I forgot to preface this with the fact that it had not been in the water in three years. I don’t know enough to really pull this thing apart myself, so will probably end up taking it to a tech to give it a once over, which probably should’ve been done before hand, but it was in such good physical condition optically, but I thought I might be able to get away with just firing in it up a little bit, after assessing out the wiring connections, and doing my best to figure out the two battery system.

Thanks for your advice I will likely do all of it in addition to taking it to the tech as well. The things I don’t know are causing me to be a bit more squeamish, and all my boating experience it was always frequently used equipment that never really had time to rest or fallow such as this.

Parting thought, even if the gas was just rolling downhill as it were, I am concerned about the amount of oil that came with it. But if that’s just a natural part of lubrication, it makes sense being that a turning prop would mix it, so that you probably wouldn’t see that…

Please continue to lend her advice as I am an avid reader of this forum, and no suggestion is met without serious consideration

[leefrankpierce]

The 1 thing I would worry about is there is a rubber impeller that is the water cooling pump.
It lives in the shaft under the engine. You basically drop the entire bottom section to replace it.
It should be replaced every few years regardless of use because the rubber degrades and falls apart.

Hose testing, the pressure provided by the hose pushes its way past the pump, through the motor and cools it, potentially hiding a broken impeller.
When you are on the water, you must have that pump working (instead of your hose pressure) or it will not cool.

There should be a stream of water coming out of the motor, just under the engine that indicates if your pump is working.
The stream of water coming out of the motor is just an indicator, not the entire volume of water.
It is there to let the operator know if the pump went out. (some call it the pee hole)

A two stoke will leave some oil and blue smoke.
Newer etec motors were cleaner than my old carburated, but I think eventually the industry had to abandon them.

Were it mine, I would change the impeller and run it, but be aware that if the wind is faster than you are going, it can blow the smoke into the cabin setting off the smoke detector. Great fun for the un-initiated.