Need help with oil leak

[Printforfood]

I'm a newby here and bought an older Bennington 2575 pontoon. I am winterizing and changed the oil , fuel filter, plugs and Lower gear lube.
After finishing I am noticing dark oil coming out of weep hole and a few other places on the lower unit ? I did use a pressure washer to clean the motor while trying to avoid any openings. could I have damaged something by using the washer ? Could the oil be that which spilled while changing the oil ? It isn't a lot of oil but its been 3 days and still see a tiny bit .?

 

[Julianna]

Did you possibly over fill the oil tank?

 

[Printforfood]

yes - a little
calls for 3.8 and I put in 4 quarts.
there is a small amount still coming out but VERY little now.
cant think of anything that i did that would cause an internal seal to go bad?