Mercury Marine Heavy Duty 899846001 - Manual (Page 37)

OPERATION
33
2. Unscrew the valve cap from the keel air chamber valve by
turning a quarter of a turn counterclockwise. Make sure the
valve stem is in the closed position. Attach the air hose
adapter to the air valve. Inflate the keel to the recommended
air pressure of 0.25 bar (3.6 psi).
3. After inflation, install the valve caps tight (turn clockwise).
NOTE: Always be aware of the air pressure in the air chambers.
The air volume inside the air chambers will expand as the internal
air temperature rises; this will cause the air pressure to fluctuate
depending on water temperature and weather conditions. A boat
that is correctly inflated, may experience a drop in air pressure and
require additional air when temperatures decrease; or it may
become over inflated when in direct sunlight or as the temperatures
increase. This will require the air chamber to be deflated until the
recommended air pressure is reached.
Overpressure Security Valve ‑ Hypalon Models
NOTE: This feature is Included on Hypalon fabric models.
If the air pressure exceeds the maximum limit, the red cap will
loosen or pop off the overpressure valve. Air will escape until the
air pressure returns to the recommended limit. Replace the red cap
on the overpressure valve.
NOTE: Keep items clear of the overpressure valve that could
prevent the red cap from popping off the valve.
a
24745
a - Red cap