CDI Electronics Outboard Ignition Troubleshooting Guide

181 Four Stroke Tohatsu/Nissan 4 STROKE Engines F4A, F4A2, F5A, F5A2, F6A and F6A2 NO SPARK: 1. Disconnect the Black and Brown stop wires and retest. If you now have spark, the stop circuit has a fault. 2. Test the stator (exciter) and trigger (pulsar) stator coils while connected as follows: Red Lead Black Lead Resistance DVA Connected Eng Gnd Black/Yellow 90 V Minimum Black/Red Eng Gnd 95-143 110 V Minimum Red/White Eng Gnd 49-223 2 V Minimum If the above readings are OK and there is no spark, the ignition coil is likely defective. F8 and F9.8 HP NO SPARK ON EITHER CYLINDER: 1. Disconnect the Black and Brown stop wires and retest. If you now have spark, the stop circuit has a fault. 2. Test the stator (exciter) and trigger (pulsar) stator coils while connected as follows: Red Lead Black Lead Resistance DVA Connected Eng Gnd Orange 90 V Minimum Blue Black/Red 238-352 110 V Minimum Red/White Eng Gnd 148-223 2 V Minimum If the above readings are OK and there is no spark, the ignition coil is likely defective. NO SPARK ON ONE CYLINDER: If only one cylinder is firing, replace the ignition coil. F9.9A, F9.9B, F9.9B2, F9.9C, F15A, F15B, F15B2, F15C, F18B, F18B2 and F20C HP NO SPARK ON EITHER CYLINDER: 1. Disconnect the Black and Brown stop wires and retest. If you now have spark, the stop circuit has a fault. 2. Test the stator (exciter) and trigger (pulsar) stator coils while connected as follows: Red Lead Black Lead Resistance DVA Connected Orange Eng Gnd 90 V Minimum Black/Red Blue 12.6-18.6 110 V Minimum Red/White Eng Gnd 148-223 2 V Minimum If the above readings are OK and there is no spark, the ignition coil is likely defective. NO SPARK ON ONE CYLINDER: If only one cylinder is firing, replace the ignition coil. ENGINE LOW ON POWER OR IDLING ROUGH: 1. Check or replace the spark plugs. 2. Check the ignition coil for good spark on both sparkplug leads. REMEMBER: DO NOT FIRE THE COIL WITH THE SPARKPLUG LEADS DISCONNECTED. Both leads have to be connected to a spark tester when checking for spark. 3. Check the engine oil to see if it is overfull. If the oil smells of gasoline, the customer may be leaving the fuel line connected, allowing the fuel tank pressure to over-ride the float in the carburetor. Check carburetor float for flexing, allowing the engine to flood the cylinders with gas. 4. Check fuel lines for restrictions. ENGINE WILL NOT EXCEED 2000 RPMS: 1. Check the oil pressure light. If the light is staying on, check the oil pressure. 2. If the oil pressure is OK, test the oil pressure sensor. It should open up at approximately 3.5-4 PSI. 3. If both the oil pressure and sensor test OK, the CD could be defective.