What is it water find

[drmar]

Found this in 3' of water in our local lake. It is 1 1/2 inches across and the same thickness, it also has a small punch mark in the center on one side only.

 

[GoGoGopher]

Looks like the drag adjustment off an old fishing real, or a part for a fishing real drag system...
Also looks like it might have been a gear for a chain system???

HH,

 

[Aarong81]

Looks like a clutch coupler. Every OTHER notch would have rubber fingers connected together and connected to a power source and the remaining notches would have the same style rubber piece but connected to a propeller or impeller on a boat or jet-ski. This clutch system is there to create a weak point to break before any expensive parts break. The picture below would be similar except the center disk is rubber and the outer fingers were metal.
http://www.mister-solutions.co.uk/file-manager/Products/rubber-clutch-coupling-fits-suffolk-punch-late-models-61122-p.jpg
http://www.mister-solutions.co.uk/product/rubber-clutch-coupling-fits-suffolk-punch-late-models-61122-p

I could be wrong, it just looks similar and makes since if a jet-ski spun its impeller.

 

[ojm bc]

n/t

 

[Jim West Pa]

n/t

 

[starvin]

It is a clutch decoupler Used in outboards and jet ski. Marv