Airmar P52 with Plastic Release Bracket 20-039 - Manual (Page 2)

2
Mounting Location
CAUTION: Do not mount in an area of turbulence or bubbles:
near water intake or discharge openings; behind strakes, struts,
fittings, or hull irregularities
CAUTION: Avoid mounting the sensor where the boat may be
supported during trailering, launching, hauling, or storage.
• For the best performance, the sensor must be in contact with smooth
water. To identify an area of clean water, observe the water flow off the
transom while the boat is underway.
• Allow headroom space above the bracket for it to release and rotate the
sensor upward (see Figure 3).
• Mount the sensor as close to the centerline (keel) of the boat as
possible to ensure the sensor remains in the water when the boat is
turning.
- Single drive boat—Mount at least 75mm (3") beyond the swing
radius of the propeller (see Figure 4). The starboard side where the
propeller blades are moving downward is preferred.
- Twin drive boat—Mount the sensor between the drives.
Installation
CAUTION: Do not position the leading edge of the sensor lower
than the trailing edge because aeration will occur.
CAUTION: Do not position the sensor deeper into the water than
necessary to avoid increasing drag, spray, and water noise and
reducing boat speed.
CAUTION: To prevent drilling too deeply, wrap masking tape
around the bit 22mm (7/8") from the point.
CAUTION: Fiberglass hull—Minimize surface cracking by
running the drill in reverse until the gelcoat is penetrated.
Align template arrow
with bottom edge
Align template vertically
Figure 4. Mounting location on single drive boat
75mm (3") minimum
beyond swing radius
of propeller
of transom.
Figure 3. Height required at mounting location and
Height without Height with
Model paddlewheel paddlewheel
P52 175mm (7-1/2") 215mm (9")
height
transom
1–3mm
leading edge
trailing edge
(1/16–1/8")
Sensor angle in “operating position” (P37 shown)
parallel to waterline
vertical
P52
P37
P55
align arrow with
bottom of transom
Figure 6. Template
drill
here
KEEL (centerline)