Mercury OptiMax 250 - Air Compressor Pressure Test

DIRECT FUEL INJECTION
Page 3B-60
90-888438 JUNE 2002
Air Compressor Pressure Test
Install Pressure Gauge Assembly 91-852087A1/A2/A3 to fuel rail pressure test valves.
Starboard rail has fuel pressure test valve. Port fuel rail has air pressure test valve.
NOTE: After 15 seconds of cranking engine with starter motor, air pressure gauge should
indicate 80
± 2 psi (551.6 ± 13.8 kPa) and fuel pressure gauge should indicate 90 ± 2 psi
(620.5
± 13.8 kPa).
a
b
c
d
00148
a-Air Pressure Gauge (Should Indicate 80 ± 2 psi (551.6 ± 13.8 kPa)
b-Fuel Pressure Gauge (Should Indicate 90 ± 2 psi (620.5 ± 13.8 kPa)
c-Fuel Pressure Test Valve
d-Air Pressure Test Valve