Air Compressor Pressure Test - Mercury Optimax 250 Manual

DIRECT FUEL INJECTION

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
(620.5
a -
b -
c -
d -
Page 3B-60
13.8 kPa) and fuel pressure gauge should indicate 90 2 psi
13.8 kPa).
a
d
Air Pressure Gauge (Should Indicate 80
Fuel Pressure Gauge (Should Indicate 90
Fuel Pressure Test Valve
Air Pressure Test Valve
b
c
00148
2 psi (551.6 13.8 kPa)
2 psi (620.5 13.8 kPa)
90-888438 JUNE 2002