[Oldlaxer1]

So I've been running the motor in the slip and trying to keep the growth off the prop and rudder. Last time I ran I noticed a different noise. I've uploaded 5 videos to Youtube so you can hear it. It wasn't bad on first run but after I ran in reverse it got worse. I have the prop nut zinc and it has been on for about 6 months so I'm wondering if it is almost gone and rattling around. I'm going to get the Gopro under the boat to diagnose as well. If you have ideas, I'd appreciate them. Thanks as always!
1 https://youtu.be/ZGzjRBZQUds
2 https://youtu.be/bwaIH_OAROM
3 https://youtu.be/gMX5Wo-TtzQ
4 https://youtu.be/snomwgBv7rM
5 https://youtu.be/hk1IJ__WfFY