Mercury Optimax Diagnostic Guide., Page 2Get this manual
OPTIMAX DIAGNOSTIC GUIDE
OPTIMAX DIAGNOSTIC GUIDE
Symptom
Rich Running
No1 Verify fuelair pressure Verify engine temperature Check for leaks in inner and outer diaphragm on pulse fuel pump Check for leaking fuel injectors Verify direct injector operation Verify correct operation of MAP sensor Verify correct propping Test and Verification Procedure 11,12 18 15 Page 1415 2728 1721
Misfire
No1 Test and Verification Check for damaged spark plug wires Determine if the direct injector is shorted to ground Verify correct spark plug gap Visually inspect for broken reeds Procedure 10 10 Page 13 13