My 2003 Mercury 115 (2-stroke, non-EFI)has a sporadic miss across almost the entire RPM band. However, it rarely misses out at full throttle (5000-5100 rpm) I suspect a bad CDM/coil pack for one of the cylinders based on past problems with another Merc. Is there anyway to test the CDM's? <br />Also, my fuel economy seems to be very poor. Could this be related or is this model just the OPEC "Outboard of the Year"?