Help on Tyee ll 1650 from 1991 transducer

[Graden]

Hi, I have a Lund Tyee ll 1650 from 1991 and recently a part that I think is part of the transducer broke off I’ll attach a picture of what the part looks like but I’m trying to find the part that spins in the water, this piece has magnets on it and was attached at the bottom of the boat to the right of the motor, the piece is all plastic besides the magnetic rutter that spins in the water, I was hoping someone knew what this part is, has a part number or can send a link, thank you in advanced

 

[Silvertip]

That is the speed sensor for speed reading (MPH) either on the locator or a separate dash mounted speedometer.

 

[Yegboats]

That's an airmar paddle wheel. You can buy replacement paddle wheels depending on how many blades yours has. Or if this one looks like what you have. Maybe

AIRMAR