Recommended Installation Tools: Phillips Screwdriver, Fine Tooth
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 higher.
Model 312 Flexed and Straight
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
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 connection therewith.
For additional information or support, contact Mauri
Pro Sailing Technical Team, your Boomkicker specialist.