Pitot Tube (Speedometer Port)
The pitot tube, located at the leading edge of the lower
unit, provides pressure input for the speedometer. If
the pitot tube becomes clogged (e.g. silt, sand, vege-
tation), the speedometer may stop functioning. There
are two methods for clearing debris from the pitot tube:
Method 1
Use a six inch length of stiff wire of 1/8 in. (3 mm)
thickness or a wire coat hanger to push any debris in
the pitot tube into the drive cavity.
Method 2
Use compressed air to clear the pitot tube.
CAUTION!
Do not place bare hand(s) in front of the pitot tube to
check for air flow as debris may be ejected forcefully
enough to cause an injury.
NOTICE!
Do not exceed 116 PSI (800 kPa) as this may
damage the drive.
1 The pitot tube hose
A
is attached to the shift cable
hose located inside the transom shield, just behind
the engine. Once you have located the pitot tube
hose, remove the speedometer hose
C
from the
plastic barb fitting
B
.
2 Attach the hose from an air compressor to the barb
fitting.
3 Have someone assist you by placing a rag in front
of the pitot tube at the leading edge of the lower unit.
4 Blow air, pressurized to
no more than
116 PSI (800
kPa), into the pitot tube hose until your assistant
can feel the air exiting the pitot tube.
5 Reattach the speedometer hose to the barb fitting
on the pitot tube hose.
P0002300
Maintenance
47702842 04-2012
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