CDI Electronics Outboard Ignition Troubleshooting Guide

73 Johnson/Evinrude Troubleshooting Johnson/Evinrude Quick-Start will also activate for 5-10 seconds each time the engine is started regardless of engine temperature. CDI Electronics (Blue case with Red sleeve) power packs have a built-in feature to compensate for a shorted cold sensor, allowing the engine to exit Quick-Start after 5 minutes of running time regardless of the condition of the cold sensor. The CDI power pack also will not spark if the wrong encoder wheel (4 cylinder) is installed by mistake. At cranking speed the voltage from the stator may not be enough to operate the circuits inside the power pack. Therefore, battery voltage supplied via the Yellow/Red striped start wire. The extra voltage is needed in order for the optical sensor to operate correctly as low voltage from the battery and/or stator can cause intermittent spark or no spark at all. There are a couple of critical items you should be aware of on these engines. First, the spark plug wires have to be the Gray inductive resistor wires – these are NOT automotive wires. Secondly, the spark plugs should be the factory recommended QL78YC. Use of other spark plugs or wires can cause problems inside the power pack from RFI and MFI noise. CDI Electronics has the spark plug wires available as a set, P/N: 931-4921. A breakthrough at CDI Electronics has allowed the use of microprocessor digital control circuits to handle the timing, Quick-Start, S.L.O.W. and rev limiter functions inside the power pack. This allows the timing to be set using a timing light, remote starter, spark gap tester, piston stop tool and a jumper wire. With these new digital power packs, you disconnect the port temperature switch/sensor leads and use a jumper wire to short the tan temperature sensor wire to engine ground. Once you have verified the timing pointer using a piston stop tool (Or a dial indicator), connect all spark plug wires to a spark gap tester, connect a remote starter to the engine and a timing light to # 1 spark plug wire. When you crank the engine over with the remote starter and check the timing, you should see the timing is set to approximately 4°-6° ATDC (After Top Dead Center). By advancing the throttle all the way and rechecking the timing for WOT (Wide Open Throttle), you should see approximately 19° - 20° BTDC (Before Top Dead Center) Without this timing feature built into the power pack, you will need the 511-4017 Timing Tool or the OEM version to set the timing for idle and WOT. Additional advantages offered by the digital circuitry include the ability to compensate for a bad temperature switch, a smoother rev limit, customized rev limiters and special timing curves. Additional items to be aware of: 1. 1991 and 1992 engines came out with a Black sleeved power pack (P/N 584122) and stator (P/N 584109) and used a P/N 584265 sensor. In 1993 the power packs were changed to a Gray sleeve (Production) power pack (P/N 584910). The stator was changed to a Gray sleeve (P/N 584981) and the sensor was changed to P/N 584914. Engines with ignition problems had a service replacement power pack with a Blue sleeve and a replacement sensor installed as a set. The Blue sleeved power pack was only available as a service replacement. The Gray sleeved stator could be used with all of the power packs, but the Black sleeved stator was to be used only with a Black sleeved power pack. The sensor P/N changed to 586343 in the late 1990’s. 2. The Gray inductive spark plug wires replaced the Black copper spark plug wires that were used on the early 1990’s engines. 3. Originally the spark plugs were the QL82YC, but that recommendation was changed to the QL78YC for improved performance. 4. Early 150 and 175 HP engines did not have the tension washer on top of the sensor encoder wheel. This washer is required to keep the encoder locked in place. If it is missing, be sure to install the correct washer. 5. 1991 and 1992 engines did not have a shift interrupter switch. This resulted in hard shifting and required a conversion to resolve this problem. 6. The shift interrupter switch stopped the spark on the starboard bank of cylinders from 1993 thru mid 1990’s. By 1998, a change was made for the shift interrupter switch to stop the spark on the Port bank. 7. 1991 through late 1990’s engines occasionally developed a crack in the water jacket allowing water into the intake at high speed. This typically resulted in # 1 cylinder ingesting water. You can usually see signs of this because the head looks like it has been steam cleaned inside the combustion chamber. 8. Some engines do not have the RFI/MFI noise shield between the ignition coils and the power pack. If it is missing, replace it. NO FIRE ON ANY CYLINDER: 1. Disconnect BOTH of the Black/Yellow stop wires AT THE POWER PACK and retest. If the engine’s ignition has fire, the stop circuit has a fault. Check the key switch, harness and shift switch. 2. Disconnect the Yellow wires from the stator to the rectifier and retest. If the engine has fire, replace the rectifier.

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