BS, or anyone, Power tilt problem

[macojoe]

Ok who knows about power tilt and trims??

1988 Yamaha 175 hp, Model 175ETXG Serial 751765

I had the dam left pistion cab come lose again!! low on oil, and tryed to get it up, but no go, So I lifted it to assist with the eletric.

After getting it home I retighten the cap and added fluid, keep going up and down till the fluid stays full (per book for bleeding)

Now it goes up and down but when up falls back down slowly.
I have drained all oil cause it looked like it might have had water in it??
But after draining all oil and refilling I still have the same problem, and when I unscrew the fill screw it lets a lot of air out, and the oil looks foamed with air in it.

So I must have some kind of internal leak?? But what and wear to look??
I am running real tight on cash and would like to try to hit the nail on the head, to save rebuilding the whole thing!!

Thanks all!!