Humminbird HDR 650 2. Preparing the Mounting Location

2. Preparing the Mounting Location

In this procedure, youwill determine the mounting location and drilltwo

mountingholes, usingthe transducer mountingbracket as a guide.

1. Makesure that the boat is levelon the trailer,

both fromport to starboard and from bow to

stern,by placing your levelon the deck of the

boat,first in one direction,then in the other.

2. Hold the mo unting bracket against the

transomof the boat in the location you have

selected.Align the bracket horizontally,using

the level;make sure that the lower corner of

thebracket does not protrudepast the bottom

ofthe hull, and there is at least 1/4"clearance

between the bottomof the bracket and the

bottomof the transomfor fiberglass boats,and

1/8" clearance for aluminumboats (see the

illustrationBoat Hull TypesRequire Different

MountingPositions).

NOTE: If you have a flat-bottomed aluminum

boat,some additional adjustmentmay be needed

to accommodatethe rivets on the bottom of the

boat(i.e. the gap may need to be a little smaller

than 1/8").This will help you to avoid excessive

turbulenceat high speeds.

NOTE: If your propeller moves clockwise (in

forward, as you're facing the stern of the boat

from behind), mount the transducer on the

starboardside, and align the bottom right corner

of the mounting bracketwith the bottom of the

boat. If your propeller moves counter-clockwise

(inforward, as you're facing the stern of the boat

from behind), mount the transduceron the port

side, and align the bottom left corner of the

mountingbracket with the bottom of the boat.

BoatHull Types Require

DifferentMounting Positions

1/4”for fiberglass

1/8”for aluminum

Positioningthe

MountingBracket

Level

TransomMount Transducer Installation