http://www.moyermarineforum.com/foru...ead.php?t=4540
My advice: cut the coupling off now with a Sawzall and replace it with Moyer's split coupling of the appropriate shaft diameter. Yes, the $175 split coupling, which will be easy to remove in the future. The removal and replacement will take 20 minutes.
https://moyermarine.com/product-cate...etrain/page/2/
You won't take this advice, but please come back after you finish this project and let me know if you think this is sound