Re: volvo outdrive oil
It's a 280 outdrive. (Newer than 66)
There is a dipstick on the top of the drive. Fill so the level is on the flat part of the dipstick. I like to keep the level in the upper part of the flat.
With the drive down, pull the back cover off the drive, there is a big plug on the upper right of the shift mechanism. Remove it and make a funnel to fit into the hole and pour the oil in slowly. until full. Allow to set for a while to make sure the air is out and the oil level is correct.
Takes about 2.5 quarts of oil.