Help diagnosing new noise

[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

[Al Schober]

Can't say I hear much..
I would recommend checking that steady bearing forward of the stuffing box. Make sure the mounting block is still bonded to the hull.

[Oldlaxer1]

I just re-listened and the third and fourth videos are where it is most prominent. Hopefully the harbor water clears up enough to use the camera to check the zinc.

[Administrator]

Does the clicking sound go up and down with RPM in gear?

Any clicking in neutral?

Bill

[Oldlaxer1]

No clicking in neutral. I’ll have to check on changes based on rpms and get back to you. Good question.