Manual: Boomkicker K0800
Note: To avoid undue stress
on the boom fitting, it's recommended that booms
be fixed in the upright position. If the boom
can roll about its' central axis, please contact
the factory before installation.
Recommended Installation Tools:
Phillips Screwdriver; Fine Tooth Hacksaw; Center
Punch; Rule; Variable Speed Reversible Drill
and Blue Locktite.
1. Setup Boom Height: Use the
main halyard to support the boom above its highest
operating position, or a desired height when
moored or docked. At this time, check that the
Model K0800 is correct. The min. length is 35"
(89cm) pin to pin and the max. weight it can
support is approximately 25 lbs. (11.3kg) at
the outboard end of the boom with the main sail
flaked as stored.
2. Position Boomkicker: The
Boomkicker works by flexing and when straight,
it is at the top of its travel. Install the
Boomkicker with the screw head side of rod clamps
facing up to flex upward away from the vang.
With the boom height set, position the Boomkicker
with fittings alongside the vang triangle to
see how it fits. Position is not critical so
long as it does not interfere with the vang.
It's recommended that both the vang and the
Boomkicker make an angle of between 30o and
45o with the boom. Mark the location for the
3. Install Mast Fitting: The mast fitting
comes with a luff grove slide to avoid drilling
the mast. Different diameters and flat slides
are available by exchange, or at the web site
or by phone. See part list. If usable, after
disassembly from the fitting, the slide can
often be inserted at the mast opening for the
sail and dropped or lowered with a string. If
the mast is out of the boat, the slide may be
inserted from the base of the mast. Reassemble
the mast bracket at the desired location and
tighten the screws. If the slide is unusable,
the bracket may be screwed directly to the mast.
Extra long screws are included if needed to
pass through the groove. Use the #7 drill and
the 1/4-20 tap provided, with the mast fitting
bracket as a guide. A variable speed, reversible
drill makes tapping easy. Go slow. Locktite
is recommended on threads.
4. Shorten if Necessary: If
the Boomkicker is too long, we recommend shortening
the rods at the mast end so any cut ends are
less visible. Loosen the rod clamp with the
provided hex-key and slide the extension up
the rods until there is a good fit. The clamp
plates for each end have embossed stops to prevent
slipping. Do not shorten total length more than
10" (25cm). Cut off extra rod length equally
from both rods with a fine tooth hacksaw. Before
tightening the clamps, check the rod ends are
against the embossed stops and the clamps/extensions
are not twisted relative to each other. It is
also recommended to check tighten the rod clamp
screws once a season.
5. Install Boom Fitting: Make
sure the rod clamps at both ends are tight.
Then attach the Boomkicker to the mast fitting,
and the slide and track at the boom end. The
angle on the track goes forward, the stop pin
aft. There are 3 standard choices for the stop
with the initial position in the middle for
later adjustment if needed. If necessary more
stop positions can be drilled using the inscribed
line along the side of the track for the 3/16"
diameter pin. With the Boomkicker in position
and slid back against the stop pin, and with
the track centered under the boom, mark one
hole. Then center punch, drill and tap. Attach
the track, recheck position, then drill and
tap the remaining holes using the track as a
guide. Use Locktite on threads. Hint: Once installed,
to attach the Boomkicker, it's usually easier
to slide the Boomkicker into the boom track
first, then attach it to the mast fitting, rather
then attaching to the mast first.
6. Check Return Force: After
installation, check return force by pushing
down on the end of the boom. The amount of support
desired is a personal preference. For reference,
with the sail flaked, using about 10 to 12 lbs.(4.5
to 5.4 kgs) to pull the aft end of the boom
down seems like a good balance between boom
support versus tension required to pull on the
vang. More support may be desired with a bimini
or if crew use the boom for support with the
sail down. Less support may be desired if the
mainsail is not stored on the boom or the Boomkicker
is used to just lift the boom in light air for
sail shape. If less or more force is needed,
optional spring rods are available either as
exchange, or ordered on the web or by phone.
The purpose of the Boomkicker is to support
the boom so the boom topping lift can be eliminated
along with the chafe, windage, hangups and adjustments.
If needed in unique circumstances, such as motoring
in waves with the mainsail down, the main halyard
can be attached to the aft end of the boom and
tightened for further support.
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.