CDI Electronics Outboard Ignition Troubleshooting Guide

183 Four Stroke ENGINE WILL NOT EXCEED 2000 RPMS: Check the oil pressure light. If the light is staying on, check the oil pressure. If the oil pressure is OK, replace the oil sending unit. F25B and F30B HP EFI NO SPARK ON ANY 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 trigger (pulsar) and stator coils DVA (while connected) and resistance (disconnected) as follows: Red Lead Black Lead Resistance DVA Connected White/Red White/Black 12-19 110 V Minimum White/Blue White/Black 10 V Minimum Red/Yellow Eng Gnd 168-252 2 V Minimum Red/White Eng Gnd 168-252 2 V Minimum Black/White Eng Gnd 10 V Minimum Black/Yellow Eng Gnd 110 V Minimum Black/Green Eng Gnd 110 V Minimum Plug Wire Eng Gnd 3.28-4.92K TIMING FLUCTUATES: Service Notes: It is normal for timing to fluctuate 1 to 2° @ idle. 1. Clean and inspect all ground connections. 2. Check the Crank Position Sensor resistance as given below: Red Lead Black Lead Resistance DVA Connected Red/Yellow Eng Gnd 168-252 2 V Minimum Red/White Eng Gnd 168-252 2 V Minimum 3. Check the Throttle Position Sensor and the Engine Temperature Sensor. 4. Check the ECU. TIMING WILL NOT ADVANCE: 1. Check the Throttle Position Sensors. 2. Check the ECU. Swap with a known good ECU if available. ENGINE MISSES AT HIGH RPM: 1. Check for correct spark plugs and sparkplug gag (See data sticker on engine). 2. Check the Crank Position Sensor. 3. Clean all engine ground connections and power connections. 4. Check the battery voltage at the engine. If high, check at the battery. If it is high at the engine but OK at the battery, perform a voltage drop test. 5. Check the ECU. ENGINE HARD TO START WHEN COLD: 1. Check the Engine Temperature Sensor 2. If the engine is electric start, check the battery voltage while cranking (battery voltage should remain over 10 volts). Try another battery and see if the problem goes away. If so, replace the battery. 3. Check the Harness for loose connections between ECU and Starter Solenoid. ENGINE MISSES @ LOW RPM, BUT RUNS SMOOTH @ HIGH RPM: Check the Harness for loose connections between ECU and Ignition Modules. ENGINE STARTS HARD WHEN HOT: 1. Check the Engine Temperature Sensor and the Crank Position Sensor. 2. Check the VST and fuel pump housing to see if they are too hot. If so, check the fuel cooler for a blockage. ENGINE WILL NOT RUN OVER 2800 RPM AND IS NOT OVERHEATING: 1. Check the Engine Temperature Sensor and the MAP Sensor. 2. Check the ECU, Throttle Position Sensor and Neutral Switch for loose connections. 3. Check the Oil pressure sensor and pressure.