1998 dp-sm 1.95:1 outdrive. I'm not too familiar with outdrives but I guess I'm going to learn just like I did with the motor. Long story short the boat sat for over 10 years. On the outdrive I changed the oil at the beginning of the season. It flowed out slow. Yes... I removed the drain bolt, vent screw and dip stick. After about an hour draining it went from slow to barely a trickle. I figured close enough since the oil coming out was clean albeit 10 years old. When adding oil I had my 3 quarts of 75w90 and was prepared to pump in 81 ounces from the bottom up. About half way through my 2nd quart it starts coming out the vent hole, indicating it's full. I thought maybe I had an air pocket in there. Spun the props and the yoke. Tried to pump more in but it just came out. I figured it was full and called it good.
Fast forward to now. Used the boat for about 70 hours this season. Checked the outdrive oil throughout the season. The level maintained right on the mark all year. It got a little darker but not black... it was still translucent. I go to winterize it and pull the dipstick and the oil level and color are as described above. Unscrew the vent and drain bolt and the dreaded milky oil starts to ooze out. Not white but a gray. So now I'm worried because of water intrusion. It still oozed out like lava or molasses. I waited about 3 hours to let as much drain out as possible. I was strapped for time and couldn't perform a pressure and vacuum test on it (I know... I should have done that at the beginning of the season... be gentle!) But I was nervous about the water in there so I didn't want it to sit without any lube in there just rotting until i could get to it. So I started pumping my $20/quart gear lube in. About half way through my 2nd quart, gear lube starts coming out the vent hole. It looked a bit dirty so I kept pumping the rest of that 2nd quart until it came out clean.
So now I need to do a pressure test to find out where the leak is. But I need to drain the oil to do so. Why am I not able to drain all the oil? Thanks in advance!
Fast forward to now. Used the boat for about 70 hours this season. Checked the outdrive oil throughout the season. The level maintained right on the mark all year. It got a little darker but not black... it was still translucent. I go to winterize it and pull the dipstick and the oil level and color are as described above. Unscrew the vent and drain bolt and the dreaded milky oil starts to ooze out. Not white but a gray. So now I'm worried because of water intrusion. It still oozed out like lava or molasses. I waited about 3 hours to let as much drain out as possible. I was strapped for time and couldn't perform a pressure and vacuum test on it (I know... I should have done that at the beginning of the season... be gentle!) But I was nervous about the water in there so I didn't want it to sit without any lube in there just rotting until i could get to it. So I started pumping my $20/quart gear lube in. About half way through my 2nd quart, gear lube starts coming out the vent hole. It looked a bit dirty so I kept pumping the rest of that 2nd quart until it came out clean.
So now I need to do a pressure test to find out where the leak is. But I need to drain the oil to do so. Why am I not able to drain all the oil? Thanks in advance!