1995 Merc 115 leaking oil

stcroixjoe

Cadet
Joined
Jun 28, 2009
Messages
25
I have a 1995 merc 115hp when I have the motor tilted all the way up for trailering it leaks oil like no tomorrow I have looked all over for the leak and can not find it, any ides??
 

shimano

Petty Officer 2nd Class
Joined
Jul 26, 2008
Messages
141
Re: 1995 Merc 115 leaking oil

You mean it is leaking 2 stroke oil?Is it oil injected?
 

stcroixjoe

Cadet
Joined
Jun 28, 2009
Messages
25
Re: 1995 Merc 115 leaking oil

yes sir, only when tilted up ,it runs great otherwise,
 

shimano

Petty Officer 2nd Class
Joined
Jul 26, 2008
Messages
141
Re: 1995 Merc 115 leaking oil

It must be coming from the injection tank.Is the level in the tank lower after the leak?Leave the motor cover off when you tilt it up and see if you can see where it is coming from.
 

stcroixjoe

Cadet
Joined
Jun 28, 2009
Messages
25
Re: 1995 Merc 115 leaking oil

It must be coming from the injection tank.Is the level in the tank lower after the leak?Leave the motor cover off when you tilt it up and see if you can see where it is coming from.

I cant see the leak
Is there a seal at the bottom of the tank or is there just hoses to the tank ?
Does anyone have a parts list/picture of the tank and how its hooked up?
 

The_Kid

Chief Petty Officer
Joined
Apr 18, 2008
Messages
447
Re: 1995 Merc 115 leaking oil

If the hose connector or the oil level sensor was leaking it would do it with the motor down, as well as when it was up. My best guess is the the fill cap is leaking, or there is a crack in the tank near the top.

The tank isn't to hard to take loose. Pull it and tip it over to the angle it would be at when it's a full tilt.
 

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Blk-n-Blu

Master Chief Petty Officer
Joined
May 12, 2004
Messages
821
Re: 1995 Merc 115 leaking oil

Take the cowling off and tilt the motor up. You will probably see the oil res leaking at the cap. Try turning the motor so the res is up high when tilted up.
 
Last edited:

sschefer

Rear Admiral
Joined
Nov 13, 2008
Messages
4,530
Re: 1995 Merc 115 leaking oil

Yep sounds like the cap is leaking.. Had a 100 that did that.
 
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