Garmin Fishfinder 250 Owner's Manual page 8

G S > I
ETTING TARTED NSTALLATION
To install the swivel-mount bracket:
Tools (not included)—Drill, screwdriver (Phillips or
standard), and either of the following:
• Three #8 (4mm) pan head machine bolts with matching
nuts and washers and a 5/32" (5mm) drill bit.
• Three #8 pan head self-tapping screws and an
appropriately-sized drill bit for drilling starter holes.
1. Using the swivel base as a template, mark the location of
the three holes that are used to secure the bracket to the
mounting surface.
2. Drill the mounting holes.
• If securing the base with machine bolts, drill three 5/32"
(5mm) holes at the locations you marked.
• If securing the base with self-tapping screws, drill starter
holes at the locations you marked. Starter holes should
generally be no deeper than half the screw length.
3. Secure the swivel base with three bolts or screws. DO NOT
OVERTIGHTEN.
4. Place the rest of the mount over the swivel base and secure
with the short knob.
4
The swivel base is designed to be secured using a pan head screw
or machine bolt. If you use a screw with a countersunk head, you risk
damaging the mounting bracket.
Secure the base and attach the mount.
OK
Fishfinder 250/250C Owner's Manual