I have a 2002 Volvo Penta 5.7Gi DP. I'm changing the outdrive oil and I'm confused on the capacity. The manual says there should be 2.5 quarts. It was full before I drained it, but only about 1 quart (if that) was drained. The outdrive is in the down position. I left it overnight, thinking it would drain more. I know that there is no way to drain all 2.5 quarts, but that's a big discrepancy. Has anyone had this same problem?