Mercury Optimax Models 135, 150, Direct Fuel Injection., Page 169Get this manual

DIRECT FUEL INJECTION
Fuel Management Assembly Removal
CAUTION
Fuel system must be bled off prior to removal of fuel system components
NOTE: Use FuelAir Pressure Gauge 91-168501 or 91-852087A1A2 to de-pressurize air hose first and then fuel hose1De-pressurize fuel system

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