Mercury Optimax Models 135, 150, Direct Fuel Injection., Page 190Get this manual
DIRECT FUEL INJECTION
Fuel Rail Cleaning
After all fuel injectors, air regulator, tracker valve, fuel regulator, inlet hoses and outlet hoses have been removed, the fuel rails may be flushed out with suitable parts cleaning solventUse compressed air to remove any remaining solvent
Top Fuel Rail ConnectionsAir HoseRetainerAllen Screws (remove)