Excellent, Vic. There's a "How To Restore Repair Granddad's ZEBCO 33" that will take you through it and schematics online if you need it - very straightforward to do. If you have a black one it's very early - chrome (1956 & rare since ZEBCO almost went under replacing the covers that corroded) - brass gears (pre-68) - additional bar beneath the main bearing shaft = feather-touch (I'm restoring one now and will use after using Granddad's '56 for 40 years).
Just to keep it all SuperCub related, 4083Z (an "A") that I racked up a ton of hours in (last I knew it was in Oregon right by some gold mining claims I had - never knew it till later):