Hull Vibration and Resonance Good IDEAS

[tlandauer]

How does the shaft line up?

Jim, not sure if this is addressed to me, all my shafts line up well, I just think that the set screws on the drive dog or the collet do contribute a bit ---however small the amount may be, and can be negligible as no one has yet taken this into consideration. An obvious sign is that this in no way hampers the normal operation of the boat.
BTW, to the OP, I am not saying you run your boat WOT out of water, I am just using this thread to further my thoughts which originated from the other thread.
Thanks!

[jcald2000]

I balance my collets, you will be amazed at how far out some collets are!

[properchopper]

I balance my collets, you will be amazed at how far out some collets are!

I've always suspected that. Will do some testing.

[JimClark]

No Tim not you the OP but I wonder if it isn't the strength of the plastic hull also

[Chrisg81983]

I have seen many drive dogs and even collets be out making my perfectly balanced prop go crazy. So now I always check the entire driveline

[tlandauer]

@ jcald2000
@Chrisg81983
Thanks for your knowledge/input, this reconfirms my suspicion.

[ray schrauwen]

Didn't Andy Kunz do this with a strobe light? I know he did some balancing using a strobe but, I can't find that paper somewhere.

Look at the prop on the bench and while you run it if the prop spins out of round you know it it out of ballance