1999 "EE" 90, 115 FFI, 150, 175 V4, V6 FFI Outboards Service Manual, P/N 787024, Page 75Get this manual
Step 4: If engine won't crank, check the following: Main battery switch (if present) Battery and connections Position fusego to Diagnostic Guide
prevent injury, all spark plug leads nected to spark tester adjusted to 716 incranking testsDo not attach spark tester bracketsBe sure spark tester is held at least from all wires and sensor leads
must remain con(11 mm) during all to the ECU or its in(51 mm) away
Step 5: If engine will crank but not start, perform cranking spark test with tester adjusted to 7A6 in(11 mm) Note Engine will crank over as long as Position fuse is okay regardless of condition of remaining six fusesResults: Steady spark on allfault is in fuel or electrical systemGo to Step No spark on some or allnote problem cylindersGo to appropriate symptom in Diagnostic GuideStep 6: If engine will run, perform the following tests (while problem is occurring, if possible)I Note OMC Diagnostic Software is able to perform cylinder drop tests, as well as provide live engine data, and should be used with the following procedures