CDI Electronics Outboard Ignition Troubleshooting Guide

131 Yamaha Troubleshooting Yamaha 2. Disconnect the White stop wire and retest. If the ignition system now has spark, the stop circuit has a problem. 3. Inspect and clean all engine and ignition ground connections. 4. Check the resistance and DVA voltage of the charge coil, trigger coils and ignition coil. Check From: Check To: Ohms Reading: DVA Connected White/Red Black 82 to 122 2.5 V Minimum Brown Black 81-99 110 V Minimum Orange Black 0.12 to 0.18 110 V Minimum Spark Plug Cap 1 Spark Plug Cap 2 2.8K (2800) to 4.2K (4200) HAS SPARK BUT WILL NOT RUN: 1. Make sure the engine is getting fuel to the combustion camber (make sure there is no water or residue in the carburetor). 2. Check flywheel shear key to make sure it has not sheared due to backfiring or impact on the propeller. 3. Check flywheel magnet to make sure it has not broken loose and moved, causing a timing shift. 4. Check spark plug for presence of water, indicating a possible cracked block or blown head gasket. 5. Check compression, carburetor, reeds and do a cylinder leak down test. 6. Check the Triggers as follows as a defective trigger can cause timing variance: Check From: Check To: Ohms Reading: DVA Reading: White/Red Black 90-110 2.5 V Minimum WILL NOT STOP (KILL): Short the White wire from the CD Module to engine ground. If the engine stops firing, the problem is in the stop circuit. If the engine continues to run with the White wire shorted to engine ground, replace the defective CD Module. ONLY HAS SPARK ON ONE CYLINDER: If only one cylinder has spark, replace the ignition coil. 9.9S and 15S HP 1984-1995 695-85540-11-00 / 117-695-11 NO SPARK ON ANY CYLINDER: 1. Disconnect the White stop wire and retest. If the ignition system now has spark, the stop circuit has a problem. 2. Inspect and clean all engine and ignition ground connections. 3. Check the resistance and DVA voltage of the charge coil, trigger coils and ignition coil. Check From: Check To: Ohms Reading: DVA Connected Brown Black 81-99 110 V Minimum White/Red Black 90-112 2 V Minimum Orange Black 0.12 to 0.18 110 V Minimum Spark Plug Cap 1 Spark Plug Cap 2 3.25K (3250) to 3.8K (3800) NO SPARK ON ONE CYLINDER: If only one cylinder has spark, replace the ignition coil. HAS SPARK BUT WILL NOT RUN: 1. Make sure the engine is getting fuel to the combustion chamber (make sure there is no water or residue in the carburetor). 2. Check the fuel in the carburetor. Check to see if a very high ethanol content is present. If so, purge the fuel system with fresh fuel and see if the engine will start. 3. Check the fuel pressure AT THE CARBURETOR. You should see over 2 PSI. Check fuel lines for inner wall breakdown and wall collapse. 4. Check flywheel shear key to make sure it has not sheared due to backfiring or impact on the propeller. 5. Check flywheel magnet to make sure it has not broken loose and moved, causing a timing shift. 6. Check spark plug for presence of water, indicating a possible cracked block or blown head gasket. 7. Check compression, carburetor, reeds and do a cylinder leak down test. 8. Check the Triggers as follows as a defective trigger can cause timing variance: Check From: Check To: Ohms Reading: DVA Reading: White/Red (High Speed Trigger) Black 90 to 112 2 V Minimum