1979 Mercury 115oil leaking from prop

[dyerk]

I have just pulled the boat out from winter storage and saw a puddle of oil under the lower unit. It appears to be leaking from where the prop meets the lower unit housing. Are there seals inside there which need to be replaced and how hard of a job is it? Special tools?

 

[Bosunsmate]

Re: 1979 Mercury 115oil leaking from prop

Whats the oil smell like?
Gear or engine oil?

 

[dyerk]

Re: 1979 Mercury 115oil leaking from prop

I will check it tonight. I didn't notice that gear oil smell as I wiped it off the floor but it was more gewy then engine oil.

 

[MH Hawker]

Re: 1979 Mercury 115oil leaking from prop

Most likely its unburnt 2 stroke oil. and normal.

 

[Mi duckdown]

Re: 1979 Mercury 115oil leaking from prop

Drain and refill lowerend fluid, that will tell you alot.

 

[dyerk]

Re: 1979 Mercury 115oil leaking from prop

Seems like engine oil

 

[dyerk]

Re: 1979 Mercury 115oil leaking from prop

Most likely its unburnt 2 stroke oil. and normal.

It thats the case where does the oil come from? Could it be that when I fogged the engine last fall that some of the fogging oil leaked out? I plan to change the lower lube either way.

 

[Bosunsmate]

Re: 1979 Mercury 115oil leaking from prop

It just old oil worked lose in the exhaust housing usually. Two stroke loopers/crossflows have some unburnt fuel coming through when the exhaust ports open and this sticks to the walls.
The fogging oil all adds to this

 

[dyerk]

Re: 1979 Mercury 115oil leaking from prop

Finally good new and not another project to tackel. Thanks for the input.

 

[brnschoneck]

Re: 1979 Mercury 115oil leaking from prop

I have a old two stroke mercury 65 65hp it does the same thing , i freaked like ooo nooo now what after changing gear lube and finding no water I posted pics on here and found out it was normal also ..As long as u changed the gear oil and it wasnt milky or water come out first ur good !!!Although changing the seals arent to hard ...