I did not replace shaft or strut. My shaft is 1 inch. I don't have specs and the boat is now in the water. My shaft was bent .100". Strut was bent about 5 degrees. Took shaft and strut out - had both straightened. In private message I sent you the number and name of a company in Mich that makes prop shafts - Marine Machining

If you need some guidance on how to get the shaft off, call me 734-341-8274. It took us two days and a special built shaft pusher to get ours off. No damage to boat, engine, shaft, etc.