Re: 1990 50 hp Force with no fire
More info? Boat? Some boats have a kill switch?Some controls have a kill switch?
Check the flywheel for the key.
Force
Prestolite ADI Ignitions 1984-1992 (Continued)
Two Cylinder Engines Using Separate Switch Boxes and Ignition Coils
1.Disconnect the kill wires from the CD and connect a DC voltmeter between the kill wires and engine ground, turn the ignition switch on and off several times. If, at any time, you see voltage appearing on the meter, there is a problem in the harness or ignition switch. At NO TIME SHOULD YOU SEE BATTERY VOLTAGE ON A KILL CIRCUIT.
2.Check the flywheel for a broken or loose magnet.
3.Check for broken wires and terminals, especially inside the plastic plug-in connectors. We recommend that you remove the pins from the connectors and visually inspect them.
4.Visually inspect stator for burned or discolored areas. If found, replace the stator. If the areas are on the battery charge windings, it indicated a possible problem with the rectifier.
IF NO FIRE ON EITHER CYLINDER:
1.Disconnect all kill wires AT THE PACK.
2.Check for broken or bare wires on the unit, stator and trigger.
3.Measure DVA voltage of the stator between the output wire sets. With everything connected, reading s should be approximately 180 volts or more. Resistance readings between the stator wire sets range from 680 - 800 ohms.
4.Disconnect the rectifier. If the engine fires, replace the rectifier.
NO FIRE OR INTERMITTENT ON ONE CYLINDER:
1.Check the stator resistance, you should read 680-800 ohms, DVA 180V or more from blue to yellow (Note - On some two cylinder engines, the stator has Iwo blue wires and no yellow wire. The stator will read from blue to blue). All stator wires should read open to engine ground.
2.Check the trigger resistance, trigger wire sets read approximately 50 ohms between the wire sets (DVA-5V or more), and open to engine ground.
3.If readings are good, disconnect kill wire from one pack. If the dead cylinder starts firing, the problem is likely the blocking diode in the other pack.
ENGINE WILL NOT KILL:
•Check the kill circuit in the pack by using a juniper wire connected to the white kill wire coming out of the pack and shorting it to ground. If this kills all fire from the pack, the kill circuit in the harness or on the boat is bad, or possibly the ignition switch.
COILS ONLY FIRE WITH THE SPARK PLUGS OUT:
•Check for dragging starter or low battery causing slow cranking speed. DVA test stator and trigger.
HIGH SPEED MISS:
1.DVA check stator voltage to each pack at high speed. If it exceeds 400 volts, replace the pack.
2.Disconnect the rectifier. If the engine fires, replace the rectifier.
3.Check for broken wires and terminals, especially inside the plastic plug-in connectors. We recommend that you remove the pins from the connectors and visually inspect them.
4.Check the flywheel for a broken or loose magnet.
5.Disconnect the kill wires from the CD and connect a DC voltmeter between the kill wires and engine ground, turn the ignition switch on and off several times. If, at any time, you see voltage appearing on the meter, there is a problem in the harness or ignition switch. At NO TIME SHOULD YOU SEE BATTERY VOLTAGE ON A KILL CIRCUIT.
6.Visually inspect stator for burned or discolored areas. If found, replace the stator. If the areas are on the battery charge windings, it indicated a possible problem with the rectifier.
