Humminbird 1158c Combo Installation And Operation Manual page 35

2. Mounting the Transducer Bracket to the Boat
1. Remove the transducer mounting template from this manual. See Appendix A for the
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.
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.
Attaching the Bracket
15" (380 mm) from prop(s)
4. Using a 5/32" (4.0 mm) bit, drill the three holes to a
5. Align the metal mounting bracket with the mounting
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.
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.
23
Level
Transom Mount - Side Imaging®