1998 Johnson Evinrude "EC" 150, 175 FFI Service Manual, P/N 520211, Page 85Get this manual
IT] Step 6: Running TestMonitor voltages using OMC Diagnos-
W tic Software while checking each plug lead using timing
lightLook for consistent flash and only one flash per revolution and steady voltages All OKsuspect worn spark plugs, fuel system problems, or internal problems Voltages are low or decrease with RPMtest charging system Voltages are steady but engine misfirescheck crankshaft position sensor air gap and resistance (see Step 3), then perform Step while problem is occurring Voltages fluctuate and engine misfiressuspect loose battery connection or damaged capacitor
IBARO PRESSURE
29 ,321rn HG 13.1 25,9
VOLTAGES NO ALT,12V NO ALT.26V
Step 7: Capacitor Verification ATurn key switch ON
BMonitor voltage at Position fuse while turning key switch OFF
Voltage quickly bleeds to near voltscapacitor is OK Voltage drops to immediatelyreplace capacitor Voltage does not dropverify stop circuitSee StepStop Circuit TestingStep 8: Stop Circuit Testing