2006 merc changing lower oil

[smidge112]

Changed the gear oil on the lower unit the day on my 2006 15 hp merc. Today when i went to fix the trailer lights i noticed that it had leaked a couple drops of oil. upon closer inspection i noticed that i had tightened down the screw and the seal was not sealing correctly and being pushed out. Backed it out just a bit so the seal wasn't being damaged and i have not noticed a leak. Has anyone else experienced this before?

 

[flyingscott]

Does your screw have the plastic/fiber washer or oring

 

[smidge112]

well i only saw the o-rings at my local western marine so i picked some of those up. This is what i used. it originally had one of those plastic ones.

 

[quicktach]

Get the correct plastic ones from your Merc dealer. Don't use o-rings. Make sure the hole is cleaned out first and the screw is not burnished underneath. Should be ok then.

 

[Alumarine]

Also make sure there isn't an old seal left in there.
I know the o ring from my pump likes to stay behind when I remove it.

 

[smidge112]

Yea I bought the o rings without first knowing what I needed. Then when changing the oil I thought it was odd that the two seals were different. But thought I'd try anyway. Guess back to the store I go