1999 "EE" 90, 115 FFI, 150, 175 V4, V6 FFI Outboards Service Repair Manual, P/N 787024, Page 79Get this manual
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I Engine
Erratic ECU signal to injector(s)
Damaged, worn, fouled or incorrect spark plugs Crank position sensorout of adjustmenterratic ignition and fuel Ignition System Erra