C Nolen wrote:
This last season I wacked some rocks with my prop and it vibrates alot. I
cleaned up the chew marks on the blades with a file and attempted to remove
a similar amount on all the blades but it still vibrates in use.
Is there good way to balance out the prop?
Temporarily I'm using a prop with a pitch I use for trolling so I'm not
messing up the bottom end.




Props are "balanced" in several ways, as you suggest just like the
wheel/tyre on a car so each blade weighs the same & again just like a
car wheel that weight is distributed throughout the blade evenly
(forward vs aft sides, near the hub or at the tips).

The other way boat props are "balanced" is that the pitch is the same
over most of the blade's surface (at least the outer 1/3) & that each
blade have the same pitch as the others. A knock that created "chew
marks" probably also knocked at least that blade out of pitch at it's tip.

As already suggested a propeller place can run a scanner over the
blades & verify the pitch is balanced, then the physical normal type of
balance is easy to achieve.

You can check the pitch yourself but it's a bit of a fiddle & given the
price mentioned it's probably best you get it serviced.


K