Ugly oil leaking from prop

[deriz]

I have some ugly oil/grease/water mixture leaking from the prop. any idea what this could be about?

Thanks

 

[tashasdaddy]

Re: Ugly oil leaking from prop

read this: http://forums.iboats.com/showthread.php?t=207285

 

[samo_ott]

Re: Ugly oil leaking from prop

TD, you're good with those links! How the heck do you keep track of em all?

 

[deriz]

Re: Ugly oil leaking from prop

Great link, thank you. I smelled the oil, smelled like two stroke so that solves that. But my gear oil was a little milky, i was told to jb weld a little hole in the shaft, but the hole looks like it is meant to be there. The motor is a 1987 johnson 9.9. any suggestions?

Thanks again

 

[Gary H NC]

Re: Ugly oil leaking from prop

JB weld is not going to stop a gear case leak.
What hole and who told you to plug it with JB?

 

[Solittle]

Re: Ugly oil leaking from prop

Install new o-rings/seals on the fill & drain plugs, fill with fresh gear oil and run it - then retest. If you are lucky that will do it.

 

[1730V]

Re: Ugly oil leaking from prop

Install new o-rings/seals on the fill & drain plugs, fill with fresh gear oil and run it - then retest. If you are lucky that will do it.

Exactly. Everybody freaks out on the oil leak issue. The above says it all. Don't overdiagnose it.

 

[HighTrim]

Re: Ugly oil leaking from prop

Agree, those drain and vent gaskets are the number 1 spot for water intrusion. Fill it with full synthetic lu oil, change those gaskets, and run it for a bit before checking it again. The water will sit at the bottom of the lower unit, so just need to empty a bit to determine if you have a breach. If it is still leaking, you will need to do a pressure/vaccuum test.

To pressure/vacuum test a lower unit:

a) drain the gear oil
b) use an appropriate adapter with a gauge tee'd in to apply pressure or vacuum. No more than 15 psig for pressure. You can use a bicycle pump or any other compressed air source for pressure. For vacuum, you need a vacuum pump.
c) LU should retain some pressure or vacuum for 45 minutes minimum.
d) If pressure doesn't hold, submerge LU in water to find leak source [possibilities: drive shaft seal, prop shaft seal(s) (usually two), shift shaft seal and the fill/drain screw washers.]
e) replace offending seal(s) as required.

 

[deriz]

Re: Ugly oil leaking from prop

cool, i will try replacing the o-rings. hopefully that will do it.


Thanks again