Have to remember those are magnets and can gain or lose resistance under heat. Correct way to test would be to put in oven and raise temp to operating temp of the engine THEN test for resistance. Maaaany magnetic operated sensors,coils, stators, etc test good when cold or work good then once warmed up, they fail. That's why if there is ANY sign of wear on those types of parts ESPECIALLY from heat, it's best to replace em'. Hope this helps someone
My 40Hp has three wires going to the trigger. One is black. My problem is no spark to either spark plug. The stator checks out fine according to your Ohm readings. What can I do now?
If you rotate the engine or the flywheel with the permanent magnets around any coils, an electrical current will be induced through the coil. Therefore, the voltmeter will register the amount of electricity generated. The AC voltage generated by the alternator is conducted to the switchbox where it is rectified and stored in a capacitor. The trigger assembly has coils too. Each coil controls spark to 2 cylinders. The flywheel also has a second set of permanent magnets located around the center hub. As the flywheel rotates, the magnets pass the trigger coils producing AC voltage. The AC voltage is conducted to and electronic switch (SCR) in the switchbox. The switch discharges the capacitor voltage into the ignition coil at the correct time and in firing order sequence. Capacitor voltage is conducted to the primary side of ignition coil. As the voltage goes to ground through the primary circuit of the coil, it induces a voltage rise in the secondary side of the ignition coil. This voltage can increase to approximately 40000 volts before bridging the spark plug gap and returning to ground. That sequence occurs once per engine revolution for each cylinder
I have spark to my plugs but when i start the engine it fires up but immediately looses spark within 2 to 3 seconds after starting. I hit the key again & it fires up but looses spark again. Can someone help me out? The boat is a 95 sea ray jet boat with 120 hp. Motor
Have to remember those are magnets and can gain or lose resistance under heat. Correct way to test would be to put in oven and raise temp to operating temp of the engine THEN test for resistance. Maaaany magnetic operated sensors,coils, stators, etc test good when cold or work good then once warmed up, they fail. That's why if there is ANY sign of wear on those types of parts ESPECIALLY from heat, it's best to replace em'. Hope this helps someone
How do I test my mercury trigger with 4 wires coming out?
Hola , como funciona un captor de 4 cables ?
Hay algun esquema con voltajes para motor mariner 50 hp 2 t 3 cilindros .
Gracias .
hello, how about the peak voltage test? this test is incomplete.
Thank you very much for the information now i know what to look for
My 40Hp has three wires going to the trigger. One is black. My problem is no spark to either spark plug. The stator checks out fine according to your Ohm readings. What can I do now?
What is the reading for coil on a jonsered 2150
Did you ever manage to find the fault on your engine? I have one doing the exact same thing.
i have the 4 cylinder and mine has 4 wires..Help please....
Where are you getting all the engine specs from?
All the specs are from manufacturer's service manuals.
What do you set the multimeter tl is it ac or dc and what do I put it on
if the move changes the meter multimeter problem may be?
If you rotate the engine or the flywheel with the permanent magnets around any coils, an electrical current will be induced through the coil. Therefore, the voltmeter will register the amount of electricity generated.
The AC voltage generated by the alternator is conducted to the switchbox where it is rectified and stored in a capacitor.
The trigger assembly has coils too. Each coil controls spark to 2 cylinders. The flywheel also has a second set of permanent magnets located around the center hub. As the flywheel rotates, the magnets pass the trigger coils producing AC voltage. The AC voltage is conducted to and electronic switch (SCR) in the switchbox. The switch discharges the capacitor voltage into the ignition coil at the correct time and in firing order sequence. Capacitor voltage is conducted to the primary side of ignition coil. As the voltage goes to ground through the primary circuit of the coil, it induces a voltage rise in the secondary side of the ignition coil. This voltage can increase to approximately 40000 volts before bridging the spark plug gap and returning to ground.
That sequence occurs once per engine revolution for each cylinder
I have spark to my plugs but when i start the engine it fires up but immediately looses spark within 2 to 3 seconds after starting. I hit the key again & it fires up but looses spark again. Can someone help me out? The boat is a 95 sea ray jet boat with 120 hp. Motor
If your ohm meter doesn't have automatic range, set it to 1000 ohms.
Is 760 ohm good?
The manufacturer spec is 800 to 1400 ohms. 760 ohms sounds a bit too low. I would replace the trigger.
For detailed no spark troubleshooting please see the following link:
www.go2marine.com/productcenters/electrical/merc-force.pdf