Cannon Magnum 10 STX TS, Owner'S Manual

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Installation
Decks thinner than 1/4"
Use a Cannon deck plate (PN 2200693) to prevent
deflection and add stability to decks thinner than 1/4".
Use the deck plate as a template to mark the hole
locations.
If access to the underside of the deck is not
available, the deck plate can be mounted using screws
and wellnuts. Use the deck plate as a template to mark
locations and drill 4 wellnut clearance holes. Use four
1/4-20 x 1-1/2" flat head screws and four wellnuts to
mount deck plate. Tighten the screws so the wellnuts
are firmly compressed.
Where the underside is accessible, the deck plate
can be mounted using screws, nuts, and washers. Drill
9/32" holes. Use four 1/4-20 x 1-1/2" flat head screws,
nuts and washers (flat and lock). Fasten plate to deck.
To secure the mounting base to the deckplate use four
1/4-20 x 1" truss head screws.
NOTE: When using the telescopic boom, we
strongly recommend the use of a deck plate on all
boats to provide adequate stability for the
downrigger.
The Low-Profile Swivel Base mounting follows the same
procedure as for the deck plate except that four 1/4"-20
x 1-1/2" truss head screws are used to fasten the
mounting base and four additional 1/4"-20 x 2" truss
head screws fix the swivel base to the boat deck.
Low-Profile Swivel Base