Humminbird 937C DF COMBO, 937C COMBO To attach the pivot to the transducer Dual frequency unit

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Level	15” (380 mm)
	from prop(s)

To mount the transducer bracket to the boat (Dual frequency unit):

1.Remove the transducer mounting template from this manual. See Appendix B for the Dual Frequency Transducer Mounting Template.

2.Hold the template on the transom of the boat in the location where the transducer will be installed. Align the template vertically, matching the lower edge of the transom with the bottom corner of the template. If your propeller moves clockwise as the boat moves forward, mount the transducer on the starboard side, and use the bottom left corner of the template. If your propeller moves counter-clockwise as the boat moves forward, mount the transducer on the port side, and use the bottom right corner of the template.

5.Align the metal mounting bracket with the mounting holes. The center slot should be above the two outer slots. (This bracket and all other hardware supplied is top quality stainless steel for maximum strength and corrosion protection.) Insert the three 1" (25 mm) flat head wood screws into the drilled holes, but do not completely tighten.

Attaching the Bracket

To attach the pivot to the transducer (Dual frequency unit):

1.Attach the pivot to the transducer body, using the two 1/4"-20 x 5/8" (16 mm) machine screws, toothed washers, and square nuts. The toothed washers must fit on the inside of the transducer ears, between the pivot and the ears. The square nuts will be prevented from rotating by the pocket in the back of the pivot. An Allen wrench is provided which fits all the 1/4"-20 screws, but do not fully tighten the screws at this time.

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1	2	4

3.Using a pencil or punch, mark the three mounting holes on the transom. Do not mark or drill any other holes at this time.

4.Using a 5/32" (4.0 mm) bit, drill the three holes to a depth of approximately 1" (25 mm). On fiberglass hulls, it is best to use progressively larger drill bits to reduce the chance of chipping or flaking the outer coating. Use a marine-grade silicone sealant to fill the drilled holes.

1 Insert the square nuts
2	Toothed Washer
3	Pivot	Attach the Pivot

4Machine Screw

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