Manual: Boomkicker K0400
Recommended Installation Tools:
Phillips Screwdriver, Fine Tooth Hacksaw.
1. General: To the right is
a sketch of the Model K0400. Two fiberglass
rods provide the force to support the boom.
The boom sits in the sling between the rods
and is held by a line to the gooseneck stop
installed directly under the boom gooseneck.
The length of the line controls teh initial
height of the boom. To check the K0400 is the
correct model, the minimum length is 26"(66cm)
end pin to sling and the maximum weight it can
support is approximately 14 lbs(6.3kgs) at the
outboard end of the boom with the mainsail flaked.
As shown the Boomkicker works by flexing and
when straight, it is at the top of its travel.
Note that the Boomkicker does not restrict the
boom from rising higher .
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 (Including any
portion inside the luff groove). Then remove.
Using the sail opening in the mast, first slide
the mast bracket down to the vang bail, do not
tighten. Next slide the top of the gooseneck
stop to the mark and tighten. Reinsert the boom
so against the gooseneck stop. If the boom gooseneck
is fixed to the mast, the slides can be detached,
slid past the gooseneck and reassembled.
3. Final Positioning: Using
the main halyard, lift the aft end of the boom
6"- 8" (15cm - 20cm) above horizontal
or normal sailing level . If the Boomkicker
fits in the area above the vang, hold the sling
around the under side of the boom and adjust
the mast fitting location to make an angel 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
and reattach the Boomkicker with clamp screws
on top and the sling loop for the line, forward.
If the Boomkicker is too long to fit in the
area above the vang, or the angle is low, the
spring rods can be cut down. Shorten the bottom
of both rods (Use the provided hex-key to loosen
rod clamp.) equal lengths of no more than 8"
(20cm). A fine tooth hacksaw works best. Before
tightening the rod clamp, make sure the rods
are against the stops on the lower plate and
Boomkicker labels are out.
4. Final Adjustments: Adjust
the line between the sling and the gooseneck
stop so the sling supports the boom. Since some
initial stretch can be expected under load,
slightly over tighten. Disconnect the halyard
from the boom and press the boom down to flex
the Boomkicker and test the force. Rods should
flex freely upward and support the boom and
mainsail without the boom sagging. Too much
force will cause the boom to bow upwards. If
less force is needed, optional smaller diameter
rods are available either as exchange, ordered
on the web or by phone.
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.