1999 "EE" Evinrude 70HP 4-Stroke Service Manual, P/N 787023, Page 64Get this manual
Engine Cranks but Won't Stay Running System Component CausesEffects
Tank empty Restricted or leaking fuel delivery system Failed low pressure pump Hose not connected No Fuel One or both fuel filters completely plugged Vapor separator needle stuck closed Blown high pressure pump fuse (15A) Failed high pressure pump (pump should run for secat key on) or plugged intake screen on pump Failed pressure regulator Replace No or low pressure at fuel railrepair Replace and look for overloaded circuit (pump draws excess ive currentcheck using ammeter) Replace separatorfuel pump assembly Vacuum test boat systemcheck for damaged primer bulb, anti-s iphon valve or poor connections that leak air Engine will run if primer bulb is constantly squeezedreplace as necessary
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Low pressure at fuel rail Engine may start and run by using the warm -up levertest and replace as necessaryDashboard tach will read 12 actual RPM but Diagnostic Software will show correct RPMTest using ohmmeterVerify using Diagnostic Software Engine may start and run by using the warm-up levertest using ohmmeter and replace as necessaryVerify using Diagnostic Software Engine may start and run by using the warm -up lever, but will run very rough at lower speeds test and replace as necessary Replace