1986 85hp force 856X6L no spark

J

Joe217

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1986 85hp force 856X6L no spark. How to test the stator? There is one set of yellow-blue going to the pack. When i set the meter leads from yellow to blue i get a reading of 704ohms . How should i test the one that has only a yellow wire? The stator is a prestolite FCC 3007.Screenshot 2025-05-30 234346.png
 
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N

Nordin

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Check at outboardignitiondotcom, they have a troubleshoot chart for the ignition system.
You can check out the resistance with a VOM, but best is to have a DVA meter or a DVA adapter with the VOM and check the output voltage from the stator.
 
jerryjerry05

jerryjerry05

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http://www.outboardignition.com/.
The Prestolite stator is probably the OEM
No fire on any cylinder: 1. Check the resistance from each blue to the yellow wires, you should read approximately 300 ohms. 2. Check the resistance from each blue and yellow wires to engine ground, you should read open circuit (Just like the leads were not touching anything). 3. Check DVA (Peak voltage) from blue to the yellow wires, you should read at least 180V. 4. Disconnect the stator wires and check the DVA (Peak voltage) from each blue and yellow wire to engine ground, you should read no voltage or extremely low voltage. No fire on one cylinder: 1. Check the resistance from the blue to the yellow wire on the pack not firing, you should read approximately 300 ohms. If the resistance is not right, check the other set of wires. If the other set is ok, gently pull on the wires close to the connector If the insulation stretches, the wire is broken inside the insulation and a new terminal needs to be put on. 2. Check DVA (Peak voltage) from the blue to the yellow wire, you should read at least 180V. NO FIRE ON TWO CYLINDERS: If two cylinders from the same CD unit will not fire, the problem is usually in the stator. Test per no fire any cylinder above. If the #1 and #3 cylinders are not firing, disconnect the Brown/Yellow wire from the pack #1 and retest. If you now get fire on #3, replace the #1 pack. If still no fire on #3, disconnect the Brown/Yellow wire from the pack #2 and retest. If you now get fire on #1, replace the #2 pack. If the #2 and #4 cylinders are not firing, disconnect the Brown/Blue wire from the pack #1 and retest. If you now get fire on #4, replace the #1 pack. If still no fire on #4, disconnect the Brown/Blue wire from the pack #2 and retest. If you now get fire on #2, replace the #2 pack
 
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killjoy

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jerryjerry05 said:
http://www.outboardignition.com/.
The Prestolite stator is probably the OEM
No fire on any cylinder: 1. Check the resistance from each blue to the yellow wires, you should read approximately 300 ohms. 2. Check the resistance from each blue and yellow wires to engine ground, you should read open circuit (Just like the leads were not touching anything). 3. Check DVA (Peak voltage) from blue to the yellow wires, you should read at least 180V. 4. Disconnect the stator wires and check the DVA (Peak voltage) from each blue and yellow wire to engine ground, you should read no voltage or extremely low voltage. No fire on one cylinder: 1. Check the resistance from the blue to the yellow wire on the pack not firing, you should read approximately 300 ohms. If the resistance is not right, check the other set of wires. If the other set is ok, gently pull on the wires close to the connector If the insulation stretches, the wire is broken inside the insulation and a new terminal needs to be put on. 2. Check DVA (Peak voltage) from the blue to the yellow wire, you should read at least 180V. NO FIRE ON TWO CYLINDERS: If two cylinders from the same CD unit will not fire, the problem is usually in the stator. Test per no fire any cylinder above. If the #1 and #3 cylinders are not firing, disconnect the Brown/Yellow wire from the pack #1 and retest. If you now get fire on #3, replace the #1 pack. If still no fire on #3, disconnect the Brown/Yellow wire from the pack #2 and retest. If you now get fire on #1, replace the #2 pack. If the #2 and #4 cylinders are not firing, disconnect the Brown/Blue wire from the pack #1 and retest. If you now get fire on #4, replace the #1 pack. If still no fire on #4, disconnect the Brown/Blue wire from the pack #2 and retest. If you now get fire on #2, replace the #2 pack
Click to expand...
How do I test the trigger and the power packs? I am having problems with no spark on a 1988 125 force.

We determined one side of the stator was bad with testing ohms (cylinders 2 and 4 had no spark). ordered a new cdi stator replacement. Installed and the boat fired up. was running ruff but attributed that to dirty carbs and motor. just bought the boat and I think it sat for a year or so. We took it to the lake, it was hard to get running but we did manage Kinda. Long story short after 45 minutes of repeated starting and the boat stalling out it would no longer fire up.

Today I messed with it more and have come to the conclusion I have no spark on any cylinder. With a test light, I can see power (flashes of light) at the rail where the stator wires and power pack wire meet. I am not seeing light on the tester for the cables feeding the coil packs. So my assumption is bad power packs, but I am not sure the way I tested it proved the power pack is bad.

We did a compression test on the cylinders today as well. All of them read 120psi
 
jerryjerry05

jerryjerry05

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No spark all cylinders? Usually both packs don't go bad. More likely the stator is bad. Even new stator can be bad. You have a kill switch? Test that.
 
K

killjoy

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jerryjerry05 said:
No spark all cylinders? Usually both packs don't go bad. More likely the stator is bad. Even new stator can be bad. You have a kill switch? Test that
Click to expand...
so i did re-test the stator it appears to be ok. how common is it for the ignition/trigger to go bad?
 
jerryjerry05

jerryjerry05

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The whole trigger doesn't usually go bad.
Try swapping the packs around?
Check the flywheel key to see if it's sheared.
 
J

Joe217

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jerryjerry05 said:
http://www.outboardignition.com/.
The Prestolite stator is probably the OEM
No fire on any cylinder: 1. Check the resistance from each blue to the yellow wires, you should read approximately 300 ohms. 2. Check the resistance from each blue and yellow wires to engine ground, you should read open circuit (Just like the leads were not touching anything). 3. Check DVA (Peak voltage) from blue to the yellow wires, you should read at least 180V. 4. Disconnect the stator wires and check the DVA (Peak voltage) from each blue and yellow wire to engine ground, you should read no voltage or extremely low voltage. No fire on one cylinder: 1. Check the resistance from the blue to the yellow wire on the pack not firing, you should read approximately 300 ohms. If the resistance is not right, check the other set of wires. If the other set is ok, gently pull on the wires close to the connector If the insulation stretches, the wire is broken inside the insulation and a new terminal needs to be put on. 2. Check DVA (Peak voltage) from the blue to the yellow wire, you should read at least 180V. NO FIRE ON TWO CYLINDERS: If two cylinders from the same CD unit will not fire, the problem is usually in the stator. Test per no fire any cylinder above. If the #1 and #3 cylinders are not firing, disconnect the Brown/Yellow wire from the pack #1 and retest. If you now get fire on #3, replace the #1 pack. If still no fire on #3, disconnect the Brown/Yellow wire from the pack #2 and retest. If you now get fire on #1, replace the #2 pack. If the #2 and #4 cylinders are not firing, disconnect the Brown/Blue wire from the pack #1 and retest. If you now get fire on #4, replace the #1 pack. If still no fire on #4, disconnect the Brown/Blue wire from the pack #2 and retest. If you now get fire on #2, replace the #2 pack
Click to expand...
Thank you for your reply. One section of the Stator was not working........... i had to replace the winding on those 5 posts.......started by hand........ after 200 loops i realized that it was not going to work........... made a litle machine and to my surprise it worked well....... 1450 loops per post of enamelled 0.11mm copper wire. At that point I put it all together and had bright spark on 3rd cylinder, and weak spark on 1st and 2nd.............. one of the cdi packs was the cause..... I have oredered a new cdi............ waiting for it...... I will give you an update once it is installed. The previous owner had a sealed battery ........... could that be why the stator and the cdi went?
 
J

Joe217

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Joe217 said:
Thank you for your reply. One section of the Stator was not working........... i had to replace the winding on those 5 posts.......started by hand........ after 200 loops i realized that it was not going to work........... made a litle machine and to my surprise it worked well....... 1450 loops per post of enamelled 0.11mm copper wire. At that point I put it all together and had bright spark on 3rd cylinder, and weak spark on 1st and 2nd.............. one of the cdi packs was the cause..... I have oredered a new cdi............ waiting for it...... I will give you an update once it is installed. The previous owner had a sealed battery ........... could that be why a section of the stator and the cdi went?
Click to expand...
 
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