Manual: Boomkicker K0312
Recommended Installation Tools:
Phillips Screwdriver, Fine Tooth Hacksaw.
1. General: The Model K0312
Boomkicker is designed for sailboats under 17'
(5m) who's boom, with sail, weighs under 16
lbs. (6.8kg). To the right is a sketch of the
Model K0312. The Boomkicker comes fully assembled.
Two fiberglass rods provide the force to support
the boom. The boom sits in the sling between
the rods. The sling is held by the line to the
gooseneck stop and controls the initial height
of the boom. The mast fitting and stop use slides
in the luff groove to avoid drilling. As shown,
the Boomkicker works by flexing upward and when
straight, it is at the top of its travel. The
Boomkicker does not restrict the boom from rising
Model 312 Flexed
2. Installing Mast Bracket and Gooseneck
Stop: The Boomkicker works best if
the boom/gooseneck is fixed in one spot on the
mast. If the boom/gooseneck can slide, then
in the normal sailing position with the sail
up, place a mark on the mast, indicating the
lowest point of the gooseneck inside the luff
groove. Then remove. Using the sail opening
in the mast, slide the assembled base with bracket
and slide to the vang bail, do not tighten.
Next slide the top of the gooseneck stop to
the mark and tighten. Reposition the boom against
the gooseneck stop. If the boom/gooseneck is
fixed to the mast, the slides can be detached,
slid past the gooseneck and reassembled in position.
3. Final Positioning: Using
the main halyard, lift the aft end of the boom
6"- 8" (15cm - 20cm) above horizontal
or the normal sailing level. Orient the Boomkicker
so the two screw heads on the base are facing
downward or aft, and the sling loop for the
line is forward. If the Boomkicker fits in the
area above the vang, hold the sling around the
underside of the boom and adjust the mast fitting
location to make an angle between 40° and
45° with the boom. The sling line should
be loose and is adjusted later. If the angle
is much lower than 40°, then as the spring
rods flex, they lose ability to hold the boom.
Tighten the bracket in position. If the Boomkicker
is too long or the angle too low, it can be
cut down. Shorten the bottom of the rods (loosen
two small screws in base to pull the rods out)
equal lengths of no more than 5" (13cm).
A fine tooth hacksaw works best and frayed ends
can be avoided by prewrapping a layer of tape
around the rod at the cut.
4. Final Adjustments: With
the boom/gooseneck held against the stop, adjust
the line between the sling and gooseneck stop
so the sling supports the boom. Since some initial
stretch can be expected under load, slightly
overtighten. Disconnect the halyard from the
boom and press the boom down to flex the Boomkicker.
It should flex freely upward and have enough
support for the boom and mainsail without sagging.
WARRANTY: The following is
made in lieu of all warranties, expressed or
implied. Seller's and manufacturer only obligation
shall be to replace or repair such parts of
the product proved to be defective for a period
of five years. User shall determine the suitability
of the product for its intended use and user
assumes all risk and liability whatsoever in
For additional information or support, contact
Mauri Pro Sailing
Technical Team, your Boomkicker specialist.