Re: Parts
Upper housing gears for what? An I/O? Who's the manufacturer? It ISN'T Four Winns.
Take a look at my signature. My 'drive' package is Volvo-Penta 'SX' model outdrives attached to 4.3 liter, fuel injected V6s... but it could just as easily be a Mercruiser or OMC package
You want to go to the Mercruiser, Volvo, OMC discussion section of the iboats forum with these kinds of questions. Have the year, make and model of the outdrive available, as well as the make/size of motor it's attached to. You'll get help there.
If your outdrive is an OMC, well, they've been out of business for more than a decade... but you need to ask your questions in the right place. The Four Winns forum isn't the right place.
Good luck!