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Oozing from back of engine Help please

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fastboy88

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"Hi, this is my first outboard

"Hi, this is my first outboard and I don't know the correct names of parts so any help would be appreciated. There is some sort of oily water mixture oozing from a hole in the back of the engine underneath the head part of the engine (I'm not sure what it's purpose is or what it is. It is not the tell tell though, whatever this is, it also smokes)and there is the same thing happening out the exhaust area of the prop. There are also traces of water in the oil when I change the gear oil in the lower end. Any Ideas?"
 
sounds like powerhead to exhau

sounds like powerhead to exhaust housing gasket
and gear case seals
do you have model # make john/rude
post some pictures they can help with better detail
 
"First mentioned sounds like t

"First mentioned sounds like the exhaust relief port. Normally you'll get exhaust gas coming from there with in most cases some water, maybe just a few drops or a mist. Some partly burnt oil ( assuming we are taking about a two stroke ) would also be normal. Also black gungy oil from the main exhaust outlet is also normal. same source, partly burnt oil.

Water in the gear oil is another matter. It or even milkiness of the oil means there is a seal leaking. It could be just a sealing washer on the drain or level plug. Or it might be the prop shaft seals (easily damaged by fishing line), the drive shaft seals or even the seal around the shift rod.

You dont say what model and year engine so cannot speculate on other possible leakage points.

It is recommended that the drain and level plug seals should never be reused. IMHO it is worth replacing the drive shaft seals and any associated O rings or gaskets when renewing the pump impeller, shift rod seal also. The prop shaft seals and any associated seals should be accessible without dropping the gearcase and may be worth doing anyway.

The pros will suggest getting it vacuum and pressure tested to identify the leaking seal."
 
"I'm sorry I forgot to inc

"I'm sorry I forgot to include the other engine specs. It's a Johnson 15 2 stroke. I don't remember exactly what year it is, although I believe it's an early 90's. It's one of them which asks for a 100:1 gas to oil mix instead of the more popular 50:1 which when I first got the boat research seemed to show that they only did that for a couple years because it wasn't giving the engine enough lubrication (according to the source at the time) I actually run it at 50:1 though, would this be contributing to anything?"
 
"Late 80s when OMC used 100:1

"Late 80s when OMC used 100:1 Started in 1985 but I'm not sure when they stopped. You are correct to use 50:1 See http://www.evinrude.com/en-US/About.Us/FAQ/Oil.Fuel.htm for confirmation.

Any 100:1 decals should be removed and the Owners manual amended.

With more oil in the fuel it is bound to contribute to the black oily gunge you see.

You should be able to identify the actual year from the model number (not serial number) on the plate on the transom bracket and sometimes also on a core plug on the power head.

Ignoring the last letter (usually) the letters of the word INTRODUCES give the year Where I=1 N=2 etc up to E=9 and S=0 thus CU,as in J15ECUD, is '87.

You should be able to ID all the parts from the parts diagrams at http://shop2.evinrude.com/ext/index.aspx?s1=fe734c8d0d019e57d43e69c77c477f81

If the oil at the top of the leg is coming from a hole that is obviously intended to be there it is almost certainly just the exhaust relief. If it is coming from a joint with a gasket then it might be what Charles Harris suggests."
 
"is this the first time starti

"is this the first time starting ,this season,
was the engine fogged for storage.
if it was that should just burn off"
 
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