psi test lower unit

[my1stboat1]

Can someone explain to me how to psi test the lower unit on an 85 hp 1988 force lower unit .. Found a Dribble of water in the lower unit today when changing the oil in my boat...


thanks guys...
Im not to sure its even much to be worried about but something id like to check into ...


thanks again

 

[jerryjerry05]

Re: psi test lower unit

Profile? U might be close to someone who can help.
If U remove the drain plug and get a bit of water from the screw hole and the rest is good oil.It just might be a bad seal on the plug.I have to use pipe sealer or pipe tape on the plug and it still weeps a bit
I have a tester that pumps air into the lower and has a guage that reads the pressure.I pump it up to about 10-13# and hope it holds.J

 

[my1stboat1]

Re: psi test lower unit

thanks... yea the water was basically a dribble.... funny thing is i took the plug out to see if there was any water in it when i winterized it and there was none... Then yesterday i changed the lower unit oil, Getting it ready for its first outting and there was alittle water like I dont know maybe a tablespoon worth of water. And then the rest was pure oill... Thanks

 

[BuzzStPoint]

Re: psi test lower unit

Don't know if it would be the same.
I have 70 55hp chrysler. When I redid my Lower end I hit it with about 10psi and found my leak in a gasket. Problem with doing this, you may not see the seals leaking air if the lower leg is still on the out board.

You'd have drain oil, drop leg in bucket of water then hit the drain plug with about 10 psi,