3.0 1987 omc cobra. changed seals on prop shaft & water pump shaft about a month ago. i'm still getting water in drive. what i don't understand is the fact that i changed all the seals in this unit about 3 yrs. ago. now i'm looking at another tear down. the oil seems do be coming from the lower half as i can see it float to the surface when the drive is tilted up. has anyone got a cobra that had problems like this? i'm considering doing a vacuum/pressure test myself. i know i'll need a tester. is this a high ticket item to purchase? if it is i may bring it to a dealer or just tear it down & start from stratch again. advice anyone?