CDI Electronics Outboard Ignition Troubleshooting Guide

79 Mariner Troubleshooting Mariner ohms to 5.75K ohms. If out of this range, replace the ignition coil. HAS FIRE BUT WILL NOT RUN: 3. Check the flywheel shear key. Replace if sheared. 4. Reset the sparkplug air gap to the factory specification of 0.040 inches. 4 and 5 HP Two Cylinder Engines 1990- With ADI Ignition (Type II) NO FIRE: 1. Disconnect the Brown Kill and retest. If the engine now has fire, the stop circuit has a fault. 2. Check the Charge Coil resistance. You should read from 93-142 ohms from the White wire to Black/Red wires. 3. Check the ignition coil’s primary resistance from the spade connector to engine ground. You should read 0.02- 0.38 ohms. 4. Check the ignition coil’s secondary resistance from the sparkplug wire to engine ground. You should read 3K -4.4K ohms. If out of this range, replace the ignition coil. HAS FIRE BUT WILL NOT RUN: 1. Check the flywheel shear key. Replace if sheared. 2. Reset the sparkplug air gap to the factory specification of 0.040 inches. 3. Verify compression is over 90 PSI. 6, 8, 9.9, 15, 20 and 25 HP Two Cylinder Engines 1990- With ADI Ignition (Type II) (339-7452/114-7452 IGNITION) NO FIRE ON EITHER CYLINDER: 1. Disconnect the Brown Kill and retest. If the engine now has fire, the stop circuit has a fault. Check the Stator and Trigger DVA/ resistance. WIRE READ TO OEM RESISTANCE CDI RESISTANCE DVA (Connected) DVA (Disconnected) Black/Yellow Engine GND 3250-3800 2200-2400 180-400 V 180-400 V (*) Black/White Engine GND 150-250 200-250 25-100 V 25-100 V (*) Brown/Yellow Brown/White 750-1400 925-1050 4 V + 4 V + (#) Brown/Yellow Engine GND Open Open 1 V + N/A Brown/White Engine GND Open Open 1 V + N/A (*) This reading can be used to determine if a stator or pack has a problem. For instance, if you have no spark on any cylinder and the stator’s DVA reading is low – disconnect the stator wires and recheck the DVA output. If the reading stays low – the stator is bad. If the reading is now within spec – the pack is bad. (#) This reading can be used to determine if a pack has a problem in the triggering circuit. For instance, if you have no spark on one cylinder and the trigger’s DVA reading for that cylinder is low – disconnect the trigger wires and recheck the DVA output. If the reading stays low – the trigger is bad. If the reading is now within spec – the pack is bad. 2. Disconnect the Black/Yellow stop wire AT THE SWITCH BOX and retest. If the engine’s ignition now has spark, the stop circuit has a fault. Check the key switch, harness and shift switch. 3. Check the cranking RPM. A cranking speed of less than 250-RPM will not allow the system to spark properly. This can be caused by a weak battery, dragging starter, bad battery cables or a mechanical problem inside the engine. 4. Inspect and clean all engine and ignition ground connections. 5. Check the stator resistance and DVA output: WIRE READ TO OEM RESISTANCE CDI RESISTANCE DVA (Connected) DVA (Disconnected) Black/Yellow Engine GND 3250-3800 2200-2400 180-400 V 180-400 V (*) Black/White Engine GND 150-250 200-250 25-100 V 25-100 V (*) (*) This reading can be used to determine if a stator or pack has a problem. For instance, if you have no spark on any cylinder and the stator’s DVA reading is low – disconnect the stator wires and recheck the DVA output. If the reading stays low – the stator is bad. If the reading is now within spec – the pack is bad. 6. Check the triggering and charge coil flywheel magnets for cracked, broken and loose magnets.