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Handy Hank's Tip: As a rule of thumb, if the hard top is strong enough to walk on, it is usually strong enough to mount an outrigger on it .
  1. If you have foam or core filled hardtop make sure its thickness does not exceed 2-1/2".
  2. Select the mounting location of the Grand Slam Mount keeping in mind that the center of the 3" hole must be a minimum of 7-1/2" away from anything that might interfere with the rotation of the handle underneath the hard top.
  3. Using the template, mark the center of the 3" hole in both port and starboard locations.
  4. With a 3" hole saw, make the holes in the hard top.
  5. Insert the Grand Slam Base into the hole with the outrigger arm laying down resting on the lip facing the stern. It is easier to tell if the base is straight if you place an outrigger in the tube.
  6. With the outrigger facing straight back, mark where the four mounting holes have to be drilled on both port and starboard locations.
  7. Using a 5/16" drill bit drill the four mounting holes in each location.
  8. If your hardtop is foam or core filled, it is recommended that you use spacers (small lengths of tubing) to fit inside where the mounting bolts pass through. This will prevent the top from compressing when you tighten the bolts.
  9. Put a bead of silicone on the underside of the flat plate of the Grand Slam to form a seal around the hole.
  10. Place the Grand Slam Mount so that the barrel goes through the 3" hole and line up the four mounting holes with the four holes in the base.
  11. Install the four mounting bolts down through the Grand Slam Mount, through the hardtop and through the backing plate on the underside of the hardtop.
  12. Install nuts and washers and tighten the bolts making sure that you do not compress the hardtop.
  13. Rotate the bottom of the Grand Slam to align it with the handle hole and install the operating lever with the nylon bushings by pushing it firmly in and slightly down until you feel the nylon bushings seat into the sockets.
  14. With the handle all the way in, hand tighten the collar to secure the handle.
  15. Repeat steps 9 through 14 on the other Grand Slam.

Installing Grand Slam On T-Top or Arch

These usually have an aluminum plate running for and aft on each side between the brace bars.

Unlace the canvas enough to expose the aluminum strips of the T-Top.

  1. To find the proper location of the aluminum plate keep in mind that the center of the 3" hole must be 7-1/2" away from any horizontal or vertical tubing that might prevent the Grand Slam handle from rotating outboard.
  2. If you are going to install your own plates, un-lace the canvas and weld aluminum plates to the aluminum strips running fore and aft on either side of the T-top. The plates must have the minimum dimensions of: 3/8" thick X 5" wide X 7" long and they should be welded on 3 sides. If you are using our weld-on mounting plate GSE-1939 or our clamp-on mounting plate GSE-1002 steps 4-8 have been done for you. It is not necessary to un-lace the canvas if you are using our clamp-on mounting plate.
  3. Using the template, mark the center of the 3" hole making sure that it is at least 7-1/2" away from anything that might interfere with the handle rotation. Using a 3" hole saw, drill a 3" hole through the plate.
  4. Insert the Grand Slam Base into the 3" hole with the arm facing aft. Install an outrigger in the tube to make sure that the outrigger is facing straight back.
  5. Mark where the four 5/16" mounting holes should go and remove the outrigger and the Grand Slam Base.
  6. Drill the four 5/16" mounting holes.
  7. Repeat steps 4 through 7 on the other plate.
  8. Lace up the canvas
  9. With a razor knife cut an X in the canvas at the 3" holes in both of the aluminum plates.
  10. Put a bead of silicone on the underside of the Grand Slam Bases around the barrel and insert into the holes through the canvas top making sure the outrigger tubes are facing aft and install the bolts and nuts.
  11. Install the operating lever with the two white bushings by pushing it into the hole and moving it up and down until you hear it click in and hand tighten the locking ring. Test the Grand Slam by pulling down o the handle and rotate into different positions all the way around.
  12. Your Grand Slam bases are now installed.

Click here to see installation instructions for small flush mount bases (PDF format).

Click here to see installation instructions for large flush mount bases (PDF format).

Click here to see information on installations of the Grand Slam Mount (PDF format).


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