Mercury Mariner 200, 225 Optimax Outboards Service Manual, 90-855348, Page 324Get this manual
FIELD TESTS IMPORTANT: Commutator end of armature must be installed in brushes when performing the following testsOhmmeter Leads Between BLUE and BLACK Motor Wires BLACK Motor Wire, and Frame (Motor Housing) BLUE Motor Wire and Frame Resistance (Ohms) No Continuity No Continuity Scale Reading (x ) (Rx1) (Rx1)
Motor Repair
REMOVAL NOTE: Power Trim System does not have to be removed from outboard to repairireplace motorDISASSEMBLY Refer to "Motor Disassembly" on page 58-29 to disassemble motor from pumpCLEANING AND INSPECTION Inspect O-rings and replace if necessaryCarefully inspect power cord for cuts or tears which will allow water to enter motorReplace cord if cut or tornClean, inspect, and test motor componentsRefer to "Brush Replacement", "Armature Test", and "Field Tests" for inspection and test procedures