Air Pressure Regulator; Tracker Valve - Mercury 200 OptiMax Jet Drive Service Manual

Air Pressure Regulator

The air pressure regulator is located on the port fuel rail.
The air regulator uses a spring to control the air pressure. This spring holds the diaphragm against the diaphragm seat. The air
must reach a pressure that is equal to or greater than the spring pressure holding the diaphragm closed. When the air pressure
exceeds the pressure of the spring, the diaphragm is lifted off the diaphragm seat, allowing the excess air pressure to dump into
the discharge hose.

Tracker Valve

The tracker valve is located on the starboard fuel/air rail assembly.
90-8M0050731 MAY 2011
Direct Fuel Injection
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