TACO Marine® Grand Slam Mounts
®
GS-390 / 390XL Outrigger Mount
INSTALLATION INSTRUCTION GUIDE
KIT CONTENTS
GS-390/390XL
Grand Slam 390 mounts or
2
Grand Slam 390XL mounts
Required*
*not included
8
8
8
8
4
Vinyl tubing spacers
5/16" x 18" x 1" bolts or
5/16" x 18" x 5" bolts
5/16" x 18" hex nuts
Nylon washers &
stainless washers
4mm Hex Bolts for Rotator
Handle
POWER DRILL WITH 5/16" DRILL BIT
•
3/16" ALLEN WRENCH
•
1/2" CRESCENT WRENCH
•
MARINE-GRADE SEALANT
•
MARINE-GRADE GREASE OR ANTI-SEIZE
•
STAINLESS LOCK NUTS & STAINLESS
•
ACORNS (GS-390 XL ONLY)
2 / GS-390 / 390XL OUTRIGGER MOUNT
®
Handy Tips
GS-390/390XL
Thank you for purchasing the TACO Marine Grand Slam 390 or 390XL Outrigger
Mount! As a family-owned and operated business since 1959, we take pride in
oering the highest-quality, innovative products with excellent customer service.
We stand behind our products 100 percent. If you have any questions about this
mount or installation, please contact us by visiting tacomarine.com/contactus.
INSTALLATION
CANVAS TOP
• It is very important that your mounting surface for the Grand Slam (i.e., T-top,
Arch or Hardtop), be suitably constructed to provide a strong mounting area for
your outrigger base. It is recommended to use TACO Marine’s weld-on Grand
Slam extrusions.
• These plates are pre-drilled and ready to install the Grand Slam. If you already
have a plate, it should be at least 3/8" thick and 5" wide, with 3-4 welded seams
to be used to accommodate the 6" length of the units' base from bow to stern.
• When installing the Grand Slam through canvas, simply cut an X over the 3-1/8"
hole and trim the excess canvas. Install and bolt down the Grand Slam.
HARDTOP
When installing through a hardtop, verify the top is foam or core filled. It is
recommended to use included spacers (small lengths of tubing cut to size) to fit
inside where the mounting bolts pass through to ensure that when the bolts are
tightened the top is not compressed.
• Backing plates are available for extra strength and
recommended when mounting through a hardtop
(part #BP150BSY-320-1).
• When installing your Grand Slam, locate the center
of the 3-1/8" hole at least 9-1/2" from the hardtop
frame, vertical post, or any other object that might
hinder the movement of the handle.
• If the top has an arch to it, wedge plates can be
ordered to keep the Grand Slams upright and
straight (part #WP-150WHA-1).
• The maximum thickness allowable for GS-390
mounting is 2" and for GS-390XL is 4-1/2".
• The 390 and 390XL mounts are a pair of Port and
Starboard units. When installing, the Pull pin to
release the outrigger needs to face outboard for
easy access.
• When installing the handle, make sure it first goes
through the larger hole (the one that is shaped like
the opening of a doghouse). If reversed, the unit
will fail to rotate.
GS-390 / 390XL OUTRIGGER MOUNT / 3
INSTALLATION
USING A SOLID PLATE
Always use high-quality, stainless-steel hardware when mounting
the base. Do not attempt to weld the base to any surface.
1. Before drilling your bolt holes, cut out a 3-1/8" diameter center hole.
2. When you are finished drilling your 3-1/8" hole, set the base in the hole being careful not to
scratch the anodized finish of the lower components, or to damage the white angle height
position indicator. Use your outriggers to help align the base.
3. The supplied template is only a guide to help align base for true hole positioning. Make sure
nothing is rubbing in the 3-1/8" hole. There should be a small gap all the way around.
4. When the Grand Slams are aligned, mark and drill out the bolt holes.
5. Bolts, washers and nuts are provided or if you purchase your own, always use good quality
stainless steel hardware when mounting the base. Please do not attempt to weld the base to
anything.
6. If using a backing plate, put a bead of marine-grade sealant on the underside of the flat
plate. This prevents water drips.
7. Securely bolt the base to the mounting surface. Install rotation handle last. Insert handle from
the larger open-ended slot, from stern-facing position. (The bottom part of the Grand Slam
can be rotated to locate this hole.) Lubricate threads with marine-grade grease or anti-seize,
making sure the handle is all the way in.
8. Screw the handle adapter to the mount using the 4mm Hex bolts. Place the outrigger in the
arm and test. Pull down on the handle and move port to starboard. Release the handle, and
it should go into locking detent positions. If the handle does not return up, push left or right
until it slides into detent position.
9. Turn the crank handle to full up and down outrigger position to ensure the outrigger does
not interfere with other top-mounted accessories.
10. The pull pin to lock the outriggers is spring loaded. Simply pull out the pull pin, rotate 1/4
turn and release. Place your outrigger into the arm and turn the pull pin to snap back into
position. Then turn your outrigger until it clicks in the locked position with eyelets facing aft
if you are mounting aluminum poles.
FIGURE 1
Place bead of
marine-grade
sealant around
hole in mounting
plate.
NOTE:
4 / GS-390 / 390XL OUTRIGGER MOUNT
Always use a nylon 5/16" washer underneath any stainless-steel washer to
prevent corrosion of the Grand Slams anodized aluminum mounting base.
How to use
When fishing with the Grand Slam 390 or 390XL, easily raise and lower outrigger
poles by turning the crank handle – either clockwise to lift or counterclockwise
to lower. For going under bridges, trailering or storage, we recommend lowering
the outriggers to ensure they don't get damaged. When the outriggers reach
the desired lowered position, you can fold the crank handle flush into the base.
How to clean
Always use a mild, non-abrasive soap and fresh water. Thoroughly wash the mounts
with a soft towel or sponge to remove dried salt crystals and other contaminants.
Rinse completely with fresh water.
Safe Cleaners Harmful Cleaners
Mild dish washing liquid, specialty marine cleaners:
Sea Safe Boat Wash, Boat Wash Concentrate
and Super Suds.
Safe marine lubricants:
CRC Corrosion Inhibitor, Corrosion Block
and Get Some Extreme.
Bleach (Clorox, etc.) and mild abrasive cleaners:
Ajax, Comet, Soft Scrub, Rubbing Compounds, etc.
Strong cleaners:
409, Engine Degreasers, etc.
Acids of any type:
Such as Muriatic, naval jelly or aluminum acid.
GS-390 / 390XL OUTRIGGER MOUNT / 5
TECHNICAL SPECS
BOW
Place a few drops of
marine-grade oil here
to lubricate seals
#1
#2
#3
1. 5/16"-18 X 1"
Stainless Steel
Cap Screw
2. 8mm Stainless
Steel Flat Washer
3. 5/16" Nylon Washer
NOTE:
Extrusion Plate
Top Mount Orientation
Mount orientation on top with
locking pin facing outboard
When not in use, lower and collapse the outrigger poles.
6 / GS-390 / 390XL OUTRIGGER MOUNT
TACO Marine
®
We’re here to help.
Need Support?
Contact Us
1.800.653.8568
support@tacomarine.com
tacomarine.com
50 NE 179th ST
Miami, FL. 33162
@tacomarine
@taco_marine
GS-390 / 390XL OUTRIGGER MOUNT / 7
INSTRUCT-GS-390
GS-390/390XL
GS-280/2801 Drill TemplaTe
Drill Template
Please print at 100 percent for accurate sizing. Slight scaling may still
occur. Therefore, before drilling, it is recommended that all template
dimensions be measured for accuracy.
8 / GS-390 / 390XL OUTRIGGER MOUNT
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