Figure 7. Servicing the paddlewheel
shaft
cover
latch
AIRMAR
®
AIRMAR
®
TECHNOLOGY CORPORATION
35 Meadowbrook Drive, Milford, New Hampshire 03055-4613, USA
■
www.airmar.com
4
Copyright 2004. All rights reserved.
Checking for Leaks
Warning
: When the boat is placed in the water,
immediately
check for leaks around the screws and any holes drilled in the hull.
Never install a multisensor and leave the boat in the water
unchecked for several days.
Operation & Maintenance
Releasing the Multisensor
Caution
: Never strike the multisensor with anything except the
palm of the hand. Never strike the paddlewheel.
The multisensor releases easily when it is fastened to the hull.
Give a sharp blow to the bottom of the multisensor using the palm
of the hand.
Antifouling Paint
Aquatic growth can accumulate rapidly on the multisensor’s
surface reducing performance within weeks. Surfaces exposed to
salt water
that do not interlock
,
must
be coated with anti-fouling
paint. Use
water-based
antifouling paint only.
Never
use ketone-
based paint, since ketones can attack many types of plastic
possibly causing damage to the multisensor. Apply paint every 6
months or at the beginning of each boating season.
Cleaning
Clean the multisensor with a soft cloth and mild household
detergent. If fouling occurs, use a Scotch-Brite
®
scour pad to
remove the growth
being careful
to avoid scratching the
multisensor’s face. In severe cases, wet sand the paddlewheel
with fine grade wet/dry paper.
Servicing the Paddlewheel
If the paddlewheel becomes fouled or inoperable, remove it for
cleaning. Insert the blade of a
small
screwdriver under the cover’s
latch (see Figure 7). Push forward while prying upward to release
the latch and remove the cover. Using a small finish nail, push the
paddlewheel shaft out.
Caution: The paddlewheel must be oriented correctly to
measure boat speed.
Orient the short side of the paddlewheel blades as shown in
Figure 8. Slide the shaft through the holes in the housing and
short side of
paddlewheel blade
BOW
Figure 8. Orienting the paddlewheel
AIRMAR
®
housing
detail
The paddlewheel
must
be oriented correctly to
measure boat speed.
paddlewheel (see Figure 7).
Be sure
the ends of the shaft are
flush with the housing. Insert the forward tabs of the cover into the
housing. Press down on the back of the cover until the latch snaps
into place. (If necessary, use a
small
blade screwdriver to
depress the tabs on either side of the latch until they snap under
the housing.)
Parts
Replace broken or worn parts immediately. The water-lubricated
paddlewheel bearings have a life of up to 5 years on low-speed
boats [less than 10kn (11MPH)] and 2 years on high-speed
vessels. Purchase parts from you marine dealer or instrument
manufacturer.
Paddlewheel Kit
33-492-01
Bracket & Wedge Kit
33-491-01
Sensor Replacement
The information needed to order a replacement sensor is printed
on the cable tag.
Do not
remove this tag. When ordering, specify
the part number, date, and frequency in kHz. For convenient
reference, record this information on the top of page one.
