Tohatsu/Nissan Troubleshooting ENGINE HAS A MID-RANGE MISS OR WILL NOT GO OVER 3000 RPM : 1. Verify the warning horn is working properly by grounding the water temperature sensor in the cylinder head (if present). 2. Disconnect the Black/Yellow RPM jumper (connected together with bullet connectors) looping out of and back into the CDI unit. If the miss is now gone, replace the CDI unit as the rev limiter circuit in the CDI unit has failed. 2. Disconnect the rectifier/regulator. If the miss is gone, replace the rectifier/regulator. 3. Monitor the stator and trigger coils DVA. It should not drop significantly right before the miss becomes apparent. 4. Check the DVA from the CDI unit. If one cylinder has a drop in DVA and the other cylinders do not, replace the CDI unit. 5. Perform a high speed shutdown (hold the RPM at the point where the miss is apparent) and shut the engine down using the key switch or emergency kill lanyard. Check the spark plugs. If water is present, you may have a crack in the engine block or a leaking head gasket. If there is no water present and one of the sparkplugs is black, swap the ignition coil for that cylinder with another cylinder and see if the problem stays with the coil (replace if it does). Replace the sparkplug if no change. 6. Disconnect the Light Blue wire to the oil sensor. Retest engine. If the engine performs normally, replace the oil sensor. 7. Disconnect the Light Blue wire to the water pressure sensor. Retest engine. If the engine performs normally, replace the water pressure sensor. 8. Disconnect the Light Blue wire to the overheat temperature sensor. Retest engine. If the engine performs normally, replace the overheat temperature sensor.
HIGH SPEED MISS: 1. Disconnect the regulator/rectifier. If the miss is gone, replace the regulator/rectifier 2. Perform a high speed shutdown and read the spark plugs. If one sparkplug is black and the others are a tan color, swap the ignition coil to another cylinder. Repeat the test. If the black sparkplug reading follows the coil, replace the coil.
ENGINE WILL NOT STOP (KILL): 1. Short the Brown stop wire from the CDI unit to engine ground, if the engine shuts down, check the stop switch and harness. 2. If the engine does not shut down, replace the CDI unit
60C, 70C 2003-2018 (3 Cyl) (3N4061601M, F8T20573, 60C SN: 10840-UP : 70C SN: 13002-UP Round Plug) Service Notes: 1. Please refer to the General Troubleshooting section in the beginning of the Troubleshooting Guide for a better understanding of basic outboard principles, terminology, and repair techniques prior to attempting any troubleshooting or repairs. 2. All DVA tests are done at cranking speed unless otherwise noted. 3. All resistance tests are done disconnected from all other components. 4. Please use the Factory recommended spark plug specified and gapped at the correct setting. WARNING!!! NEVER DISCONNECT THE SPARK PLUG WIRES WHILE THE ENGINE IS RUNNING AS THIS WILL DAMAGE THE CDI UNIT. DO NOT ATTEMPT TO START THE ENGINE WITH THE SPARK PLUG WIRES NOT CONNECTED EITHER TO THE SPARK PLUGS OR A SPARK TESTER.
NO SPARK ON ANY CYLINDER:
GENERAL
1. Disconnect the Brown stop wires and retest. If you now have spark, the stop circuit has a fault. 2. Disconnect the regulator/rectifier. If spark returns, replace the regulator/rectifier. 3. Test the Exciter Coil, Pulsar Coil, and CDI unit as follows: Read from White/Green (Exciter Coil) White/Red (#1 Pulsar Coil) White/Black (#2 Pulsar Coil) White/Blue (#3 Pulsar Coil) Black/White (#1 Primary) Black/Red (#2 Primary) Black/Green (#3 Primary) Black/White (Coil Input) Plug Wire (Coil Output)
172
Read to White/Yellow (Exciter Coil) Black (Engine Gnd) Black (Engine Gnd) Black (Engine Gnd) Black (Engine Gnd) Black (Engine Gnd) Black (Engine Gnd) Black (Engine Gnd) Black (Engine Gnd)
Ohms 427-600 Ω 178-240 Ω 178-240 Ω 178-240 Ω - - - 0.16-0.26 Ω 2.56–3.84K Ω
TROUBLESHOOTING GUIDE - Tohatsu/Nissan Troubleshooting
DVA Connected 135 V Minimum 4.75 V Minimum 4.75 V Minimum 4.75 V Minimum 190 V Minimum 190 V Minimum 190 V Minimum 190 V Minimum -