I’m pretty sure I still have a couple prop shaft seals left in the box as I bought a lot of five. I’d have to hunt for them as they went into storage last year during a reno and when I find them I’ll take some photos. The 4423/4425 motors got only one as the lip seals the shaft and whatever sealer/adhesive I used sealed the OD.
I can’t remember which one but one seal is quite large in diameter and went above the ball bearing on the driveshaft. The smaller ones went on the prop shaft.
