Water in lower unit?

[steplift20]

Ok I didn't get it fixed yet but I changed the lower unit oil and ran the motor with ear muffs and didn't lower the motor in water, I changed the oil again and it was discollered again , I think it might be the seals below the water impeller housing, what do you think? I got a price to reseal the lower unit and was told about 600 dollars. That seems high to me what do you guys think? Thanks