---

Whole boat vibrates at low speeds. Fine at idle or up on plane. Is this because of the ding on my prop or could it be bad prop size?

2017 Montauk 170 with Mercury 90hp. Propeller is Vengeance 13.125 X 16. I bought it from original owner July 2022 and didn't notice the prop ding or any vibration last year. But I may have just overlooked both or either in my excitement. Noticed the vibration all summer this year, though. So I figured I would replace the prop when I winterize.

Big dilemma is whether or not to replace with same prop model and size, or try something different. I'm rather overwhelmed by prop discussions but it seems lots of people use 19 pitch for that boat/motor.

Also I'm quite confused as to whether my motor has command thrust. I think gearing is 2.33 rather than 2.08. Original invoice says L4NA 4 cyl. Model# is 1F904131D. Manufactured 2016.

Would love to maybe try a better prop in case the vibration was prop size/type. Any suggestions? We use boat for general use on freshwater inland lake. Mostly skiing, tubing, tooling around, some fishing.

Included pic of prop damage. I have no idea if that amount of prop damage is likely to cause vibration.