Angle Thru hull transducer on 2001 21se?

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How to know your deadrise.

This is done with boat on a trailer. First you will need a angle finder.

A cheap one from Harbor Freight. https://www.harborfreight.com/dial-gauge-angle-finder-34214.html

Lay under the boat at the transom area. Take a reading on Port side and write that down...Take a reading on STB side and write that down. Add them together and then divide by 2. That is your deadrise angle. It will compensate if the trailer is sitting at a angle.
 

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