Well I did find my issue. Thanks schmidty
This isn't my pump but it's a pump for reference. Now I see what's meant by the shoulder the washer sits on. Looks like all I'll have to do is push the seal in further and worst case scenario the driveshaft has to come forward a little more to expose that lip too. But I'll try the seal first. I should be able to find some pipe or a spacer the size of the seal race and cut it down, then put it in between the prop and seal and tighten it down. Therefore the pressure will. Be distributed evenly and be nice and easy. It's my first time working with a mag pump, I wasn't sure what exactly to expect.
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