Garmin Fishfinder 340C Install Manual

(3.0mm)

1/8"

(141.6 mm)

5.58"

110.0 mm)

     4.33"

Cut the mounting surface along the 

inside of this line. Be very careful 

when cutting this hole; there is only a 

small amount of clearance between the 

unit and the mounting holes.

Unit outline

Drill a 3/8" hole, and   

begin cutting here.

1. Trim and tape this template to the mounting location. Avoid cable areas.

2. Drill four 1/8" (3 mm) mounting holes at the indicated locations. 

3. Drill a 3/8" (10 mm) hole at the location indicated on this template, and then 

    use the jig saw to cut the panel along the inside of the indicated line.

4. Install the four mounting studs into the unit by screwing the shorter section 

    into the back of the unit. 

5. Use a 0.05" Allen wrench to tighten the mounting studs until the stop 

    contacts the case. Be careful not to overtighten, because this can damage the 

    mounting stud! The studs have a reusable thread-locking patch pre-applied 

    from the factory. 

6. Place the unit into the cut out of the mounting surface.

7. Place washers over the mounting studs, and then thread on one hex nut per 

    mounting stud. 

8. Tighten all four hex nuts until the unit is snug against the mounting surface. 

9. Install and tighten the second hex nut on all four mounting studs to lock 

    the first one into place.

Drill mounting holes

April 2006 

                                     Part Number 190-00658-02 Rev. B 

Printed in Taiwan

Flush Mount Template