1996 Volvo Penta SX Cobra. I think this is from the years where SX cobras was joint venture w/ OMC. Filling outdrive by slowly pumping into the bottom drain plug. The upper plug on the side is removed but no oil has dripped out. I have pumped in just less than 2.5 quarts judging by marks on side of gallon jug. Oil level at dipstick is 1/4" above the top of machined flat part of dipstick. By measuring outside, it looks like oil level is almost 2" above the open side plug. Looking for advice, as I was expecting the oil to reach the side plug to indicate it is full. Any suggestions? Using Volvo-Penta gear oil. Temp in garage is 65 degrees F, so oil flows freely.