Mercury Optimax Models 135, 150, Direct Fuel Injection., Page 168Get this manual

DIRECT FUEL INJECTION
High Pressure Electric Fuel Pump
1Install Pressure Gauge Assembly 91-852087A1A2 to starboard fuel rail pressure test valve
NOTE: After 15 seconds of cranking engine with starter motor, fuel pressure gauge should indicate 89 psi (613.5 13.8 kPa)

• ATV
• Jet Ski
• Outboard Motors
• Personal Watercraft
• Snowmobiles
• Stern Drives