I recently had a gill net wrap around the prop of my 200 horse Mercury. I took the seal off and checked it and you couldn't tell where the outside of the seal began and the monofilament line ended. Line was sticking out everywhere. I had trimmed off all the line sticking out before taking it off and noticed the seal itself looked good.
I didn't trust it so I took it in and had a mechanic look at it. They said they tested it and there were not any damages. They said the put the original one with the frayed line back on because the seal was still good.
My question is should they have gone ahead and replaced the seal and put a new one on in it's place instead of putting the old one back on? It was right there in front of them and it shouldn't have cost anymore to do it than the cost of the seal. Time shouldn't have been a factor since they had it for 10 days.
Is this the way most dealerships would have handled this or should I be looking for someone new to work on my boat next time? I'm not a mechanic by any means but would think going ahead and putting on a new one would make sense.

