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Prospector
Master Marine Consultant

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Canada
3159 Posts
Initially Posted - 06/07/2012 :  08:01:36  Show Profile  Visit Prospector's Homepage
My new-to-me 4-stroke 9.9 HP outboard wants to leak oit out everywhere whenever it is laid down. Is this normal? How do you transport these engines to the boat without making a mess everywhere?
"Iris"
1984 FK/SR #4040
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awetmore
Master Marine Consultant

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USA
1144 Posts
Response Posted - 06/07/2012 :  08:09:52  Show Profile
What make and model is it? The manual should tell you a safe way to lay it down. I've been able to find online manuals for both of our engines (but both are less than 15 years old).
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Prospector
Master Marine Consultant

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Canada
3159 Posts
Response Posted - 06/07/2012 :  08:32:33  Show Profile  Visit Prospector's Homepage
Evinrude/Omc 1999 9.9 hp

I'll hunt around a little, right now it looks like the cure is to drain the oil before transporting.
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OLarryR
Master Marine Consultant

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USA
3467 Posts
Response Posted - 06/07/2012 :  08:58:36  Show Profile  Visit OLarryR's Homepage
On my Honda there are flat stops on one of the sides of the engine block. That is the side that the outboard is laid down. The flat stops, if I recall, are approximately 1-2" square on one of the sides just below the cowling.
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WesAllen
Navigator

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USA
222 Posts
Response Posted - 06/07/2012 :  17:41:01  Show Profile
My Mercury has a decal on one side that tells that is the side to have up. Otherwise it has to be upright. Mine is a 2006 9.9hp.

Wes
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delliottg
Former Mainsheet C250 Tech Editor

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USA
4479 Posts
Response Posted - 06/07/2012 :  17:51:44  Show Profile  Visit delliottg's Homepage
This doesn't really help, but my "new" 5hp 4-stroke dinghy engine leaks oil even if you lay it on the side indicated by the decal. I discovered that after laying it down inside my dockbox.
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OJ
Master Marine Consultant

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USA
4382 Posts
Response Posted - 06/07/2012 :  18:29:26  Show Profile
http://www.ehow.com/how_8553714_lay-down-outboard.html
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Voyager
Master Marine Consultant

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USA
5379 Posts
Response Posted - 06/07/2012 :  21:36:11  Show Profile
If you lay the engine down on the wrong side it will leak oil inside the cover area, then drip out. If you turn it over on the correct side, the oil that is inside the cover will leak on the other side, even though the engine itself may not be leaking oil - its just dripping out of the cover.

You could remove the cover and check to see where oil leaks out. If it comes out of the dipstick, maybe the rubber seal gasket is NG. If it comes out of the oil filter, maybe it's not tight. If it comes out of the carburetor, you're in trouble (bad piston rings) and if it comes out of the exhaust, same problem.

After you stand it back up, place it on the boat and start it, does it exude a big cloud of blue smoke? This could also indicate bad rings.
Edited by - Voyager on 06/07/2012 21:39:44
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Tim M
1st Mate

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60 Posts
Response Posted - 06/08/2012 :  10:00:43  Show Profile  Visit Tim M's Homepage
As Bruce says, there are many ways and places for the oil to leak out of an engine laid on the wrong side and sometimes even on the correct side. But I must disagree that oil in the carb or smoking when it finally starts means you have bad compression/rings. If a valve happens to be in the open position when the engine came to a stop for example, then there is another way for oil to drain into the top of the engine. How do I know? When I recently brought home my new Tohatsu 9.8 I carefully wrapped a large plastic bag around the head to catch any last drops of gas but when I got home several hours later, I discovered I had layed it on the wrong side and almost all the oil leaked out and into my trunk. I wiped out all that I could, left it on the stand for a couple days and then dried the plugs, hooked it all up and ran down the battery intermittantly cranking and re-drying the plugs without any sign of life. Finally I noticed oil seeping out around the joints in the air horn and so I removed the carb and poured about a cup of oil out of it. I flushed it good with gas and re-installed it and it fired up immediately - with a big cloud of blue smoke for a minute. The motor runs great and being brand new I'm sure the rings and valves are up to specs. It's also important when laying the motor down even on the correct side that the horizontal center line of the motor runs dowhill towards the prop - keeping the head elevated helps. Of course occasional ignorance doesn't help but I've found from all the outboards I've had - 2hp on up - they really don't like lying down all that much.
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Sloop Smitten
Master Marine Consultant

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USA
1181 Posts
Response Posted - 06/08/2012 :  14:53:18  Show Profile
Good observation Tim. Thanks for sharing.
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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.