Humminbird HDR 650 manual Level, Deadrise Angle

•On boats with stepped hulls, it may be possible to mount the transducer on the step. Do not mount the transducer on the transom behind a step to avoid popping the transducer out of the water at higher speeds; the transducer must remain in the water for the control head to maintain the sonar signal (see the illustration Stepped Hull).

•If the transom is behind the propeller(s),it may be impossible to find an area clear from turbulence, and a different mounting technique or transducer type should be considered, such as an Inside the Hull Transducer.

•If you plan to trailer your boat, do not mount the transducer too close to trailer bunks or rollers to avoid moving or damaging the transducer during loading and unloading of the boat.

•If high speed operation is critical,you may want to consider using an In-Hull transducer instead of this Transom Mount transducer.

Turbulence-Free Location

Level

15”

Find a turbulence-free location at least 15” from the propeller(s) and not in line with trailer bunks or rollers.

NOTE: The hydrodynamic shape of your transducer allows it to point straight down without deadrise adjustment.

Deadrise Angle

NOTE: If you cannot find a transom mount location that will work for your high- speed application, find an In-Hull Transducer by contacting our Customer Resource Center at either 1-800-633-1468or by visiting our Web site at humminbird.com.

11Transom Mount Transducer Installation