just wanted to update on a problem i was having during the winter that still has some open questions about what went wrong. omc cobra drive, the drive was stuch and we couldn't get it off no matter how hard we tried during the wither. well after we took off the shrink wrap we got the engine ready to come out and lifted and adjusted the engine while trying to get the drive off but it still wouldn't come off. we then cut the shaft on the engine side of the u-joints (the part that actually goes into the coupler). the drive was then able to come off. i just wanted to see if anyone knew what would cause that. i looked all over for some sort of corrosion but didn't see any, it looked like no water or anything made it to that area. at first i though it might have been alignment but after trying to move the engine and it still not coming free i can't think of anything else that could cause it. well the broken shaft is still in the coupler, don't plan on removing it just going to replace both. any thoughts on what would have caused it to be so stuck?