Garmin Fishfinder 300 ML Installation Instructions Manual - page 2
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Fishfinder 300C Installation Instructions
Use the following table to determine the drill bit size:
Material
Material Thickness (in.) Material Thickness (mm) Hole Size (in.) Hole Size (mm) Hole Size (Drill Number)
Aluminumalloy
sheetmetal
from1/32to5/64
from0.76to2.03
.128
3.25
30
from3/32to3/8
from2.28to9.52
.147
3.73
26
Fiberglass-allthicknesses
.140
3.56
28
HighDensityPlastic-allthicknesses
.125
3.17
1/8
Plywood(resinimpregnated)—Professionalinstallationrecommended
.144
3.66
27
Drill Size Table
To mount the bracket assembly:
1. Usingthebaseofthebracketasatemplate,markthelocationofthethreeholes(twoscrewstowardsthefront,onescrewtowardsthe
back).
2. Usingthecenterpunch,indentthecenterofeachofthethreemounting-holelocations.
3. Drillthemountingholes,usingthebitsizeindicatedintheDrillSizeTableabove.
4. Securethebasewiththethreeincludedscrews.
To install the Fishfinder 300C on the mounting bracket:
1. AligntheslotonthebackoftheFishfinder300Cwiththemountingknob,andslidethefishfinderintoplace.If
necessary,adjusttheknobtospreadthebracketarmsapart.
2. AdjusttheFishfinder300Cangleandtightentheknobuntilsnug.
Flush Mounting the Fishfinder 300C
In addition to four of the included number 8 ANSI (4.2 × 1.4 DIN7981) mounting screws, flush mounting the Fishfinder
300C requires the following tools:
Phillips-head screwdriver
Drill and drill bit (refer to Drill Size Table above for drill size) for mounting holes
3/8" (10 mm) drill bit for pilot hole
Jigsaw
Scissors
Center punch and hammer
File and sandpaper
Anti-seize lubricant (optional)
NOTE: Ensure that the surface on which you mount the Fishfinder 300C has sufficient open space behind it to accommodate the Fishfinder 300C and
the connected wires.
To flush mount the Fishfinder 300C:
1. Theflush-mounttemplateisincludedintheproductbox.Trimthetemplateandensureitwillfitinthelocationwhereyouwanttoflushmount
theFishfinder300C.
2. Theflush-mounttemplatehasadhesiveontheback.Removetheprotectivelinerandapplythetemplatetothelocationatwhichyouwantto
mounttheFishfinder300C.
3. Usingthecenterpunch,indentthecenterofeachofthefourmounting-holelocations.
4. UsingadrillbitasspecifiedbytheDrillSizeTable,drillthefourmountingholes.
5. Usinga3/8"(9mmor10mm)drillbit,drillapilotholeinsidethecornerofthetemplatetobegincuttingthemountingsurface.
6. Usingthejigsaw,cutthemountingsurfacealongtheinsideofthesolidlineindicatedontheflush-mounttemplate.Useafileandsandpaper
torefinethesizeofthehole.
7. ApplytheadhesivesideofthegaskettothebackoftheFishfinder300C.
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