Mercury Optimax Models 135, 150, Direct Fuel Injection., Page 182Get this manual
DIRECT FUEL INJECTION
FUEL INJECTOR REMOVAL
1Remove screws securing injector
NOTE: Use cotter pin extractor tool in pry holes to remove injectors2Gently pry up on injector to loosen O-ring adhesion and remove injector
aScrewsPry Holes 3Inspect fuel injector orifices for foreign debris; O-rings for cuts or abrasions and plastic components for heat damageReplace components as required4An ohm test of the fuel injector may be made by connecting test leads to injector terminalsOhm reading should be 1.8 0.1 ohmOHMS 4030 20 15 10 100 200 20 30 10 10 15 40 0S 20 VOLT0 2468 10 DC AMPS