Mercury Marine Heavy Duty 899846001 - Manual (Page 35)

OPERATION
31
NOTE: The floorboards are strengthened with the side joiners
installed on the floorboards. Position these side joiners so they
will fit between the rubber stoppers located on the side air
chambers.
6. Slightly inflate the keel in order to raise the floorboards off the
floor.
7. Attach the side joiners to the sides of the floorboards. Five
board models require two side joiners per side and six board
models require three side joiners per side. Position the joiners
between the rubber stoppers.
a
b
24122
a - Side joiners b - Rubber stoppers