FLUSH MOUNT TEMPLATE GPSMAP 172C/178C (EXTERNAL ANTENNA VERSIONS ONLY) UNIT OUTLINE CUT 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 Hole. Drill four 3mm (1/8") mounting holes at the indicated locations. Install the four Mounting Studs into unit by screwing the shorter section in to the back of the unit. Use a .050" Allen Wrench to tighten the Mounting Studs until the stop contacts the case. Be careful not to overtighten as this may damage the Mounting Stud! The studs have a reusable thread-locking patch pre-applied from the factory. Place the unit in position in the cut out in the mounting surface. Place washers over the Mounting Studs, then thread on one Hex Nut per Mounting Stud. Tighten all four until the unit is snug against the mounting surface. Install and tighten the second Hex Nut on all four Mounting Studs to lock the first one in place. DRILL A 3/8" HOLE. BEGIN CUTTING HERE 100.0 mm (3.93") Provide adequate clearance to press together the data card cover handles and for the data card cover to swing open freely. 138.0 mm (5.43") © Copyright 2004 Garmin Ltd. or its subsidiaries Garmin International, Inc. 1200 East 151st Street, Olathe, Kansas 66062, U.S.A. www.garmin.com Part Number 190-00321-04 Rev. B June 2004 Printed in Taiwan ...