Garmin Fishfinder 250 Owner's Manual

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GETTING STARTED > INSTALLATION6 Fishfinder 250/250C Owner’s ManualFlush Mounting the Fishfinder 250/250C UnitThe Fishfinder 250/250C can be flush mounted on a flat panel. Whenflush mounting the Fishfinder 250/250C, choose an appropriatelysized location for the unit. Use the Flush Mount Template providedin the box to determine a location. Check that all cables reach theunit mounting location before beginning installation. Always wearsafety goggles and a dust mask when drilling, cutting, or sanding.To flush mount the Fishfinder 250/250C:Included mounting hardware—Four 3mm studs, four flatwashers, and eight 3mm hex nuts.Tools (not included)—Center punch, drill, 1/8” (3mm) drill bit,3/8” (6mm) drill bit, jig saw, 1/16” (2mm) Allen wrench, and9/32” (7mm) wrench.1. Trim the Flush Mount Template and tape it in the appropriatelocation.2. Using a center punch, indent the center of each mountinghole location.3. Using a 1/8” (3mm) drill bit, drill the four mounting holes.4. Using a 3/8” (6mm) drill bit, drill a hole for a location to begincutting the mounting surface.5. Using the jig saw, cut the mounting surface along the insideof the dashed line indicated on the template.NOTE: Be very careful when cutting this hole; there is only asmall amount of clearance between the unit and the mountingholes. It may be prudent to cut slightly inside the indicated lineand then sand or file the panel as needed to obtain the best fit.6. Install the four mounting studs into the unit by screwing theshorter section into the back of the unit. Use a 1/16” (2mm)Allen wrench to tighten the mounting studs until the stopscontact the case. Be careful not to overtighten, as this maydamage the mounting stud. The studs have a reusablethread-locking patch pre-applied from the factory.7. Place the unit in positioninside the cutout area ofthe mounting surface.8. Place washers over themounting studs, thenthread on one hex nut permounting stud. Tightenall four hex nuts until theunit is snug against themounting surface. Installand tighten the second hexnut on all four mountingstuds to lock the first hex nut in place.StudsWasherHex nutsMounting surface (as seen from back)