1999 "EE" Evinrude 70HP 4-Stroke Service Manual, P/N 787023, Page 66Get this manual
I Low Fuel Pressure at Injectors
Engine Lacks Power or Runs Rough
System Component CausesEffects
(1) Worn electric fuel pump or restricted fuel system (2) Failed pressure regulator in vapor separator Improper fuel delivery to one cylinder Engine will run if primer bulb is constantly squeezed No spark to one or two cylinders
Actions
Use adapter OMC PIN 5000000Test fue pressure at fuel railshou ld be 34 PSI (234 kPa) or more and steady
Failed Injector Failed Low Pressure Pump Fouled Spark Plug or Failed Coil MAP Sensor CTP Switch (on engine) Stuck On
Verify injector signalreplace as necessary Verify cam lobe is not damagedreplace as necessary Verify coil output
MAP2hose off or pulse limiter is plugged Timing will remain at BTDC when engine speed exceeds 1000 RPM WOT RPM is less than recommended when water-testing (1) (2) (3) (4) Overheat No oil Extended over-revving Neutral switch stuck on