No spark 3&4 87 125

[Stokes760]

So no spark on 3&4 so going threw the trouble shooting from outboard ignition. I'm tested the stator and read around 740 ohms. I dont have a peak voltage adaptor just doing resistance checks right now. I tested the trigger resistance 1 2 3 had all 50 ohms and 4 had no continuity.

So question is if the trigger is bad for #4 would it cause the no spark on #3. Any good tests I can go from here? Thanks in advance.

 

[jerryjerry05]

No spark on 3/4 usually means the stators bad.
There is no actual test for the pack.

Swap the leads on the pack around and see if you can get spark when they are swapped.
Swap the coils.
Then swap the packs.

The trigger: the leads are thin and they break under the shrinkwrap.
Try pulling the wires and see if they come loose.
I haven't seen that many triggers go bad.

Usually the stator

 

[Stokes760]

I ohm tested the stator and tested good. I' going to pull the kill wires on the cdi and see if i get spark. I'll check the trigger leads and see if broken.

 

[Stokes760]

Pulled the kill wires on the pack still no spark. Can the stator still be bad if it ohms good? I onr have a peak voltage tester. Just don' want to throw parts at the problem

 

[jerryjerry05]

And yes the stator can be bad even when it passed the 1st test.
The peak reading volt meter module needed to do the test can be made from the posts on this forum.

Try swapping the packs.?

 

[SkiDad]

I'm a little rusty of my force info but I disagree on this - i feel you might have a bad power pack. there are test for this at outboardigntion.com - http://www.outboardignition.com/support/116-3301.pdf

 

[pnwboat]

Do you have the round black plugs to make the connections from the stator to the CD Modules? If so, you might have a broken wire at the pin inside the connector.

 

[jerryjerry05]

Skidad, you read the test you suggested?
There is no test for the pack, it tests everything and if they all test good??
Then the packs bad.

The 87 didn't have the plug and play(round black plugs) they were used before 87.
The 87 used the screw down connectors.(WAY BETTER)

 

[Stokes760]

A little up date. On the 2nd cdi pack the red lead was pluggd into #4 and orange into #3. Switched the leads and now have spark on 1 threw 3. #4 is still dead.

 

[Stokes760]

So here' where I stand. Ohms the trigger leads all are at 50. Right where trouble shooting guide says. Do dva on trigger 2 and 3 are at .31v and 1and 4 are at .25v. Bolth are under the .5 minium in trouble shooting but i have spark on 1threw3.
tryed testing the stator but can' get a ohm reading or dva to show anything. Thought I was makeing progress but seem to be sol.

 

[jerryjerry05]

Did you try swapping the packs around? Post #5

You try switching the coil leads around on pack #2? Post#2
That shows the coils not getting spark on #4

You need to do these simple tests first.
The dva tests mean nothing unless you do the tests.

From your tests it shows the stator "might be bad"
It also shows that a pack "might be bad"
Do those tests I suggested and post the results.
Then I can tell you what you'll need to buy.

You have blue or black packs and coils?

 

[SkiDad]

Some might not know this, but even though the packs fire every other cylinder, if a pack has a bad diode it can affect 2 adjacent cylinders

Pack 1 fires 1 and 3 and pack 2 fires 2 and 4. Say if pack 2 has a bad diode it can cause 3 and 4 not to fire. This is exactly what happened to me a few years ago.

 

[Stokes760]

Here' where im at today. Swaped cdi leads to coils red for red orange for oranne.
got spark and 3&4 so all ignition coils are good.
got spark on 1 not 2. Swaped red and orange leads got spark on 2 not 1. So orange lead on rear cdi is dead. Only wierd thing is when i originally starting working is rear cdi red lead was on #4 and orange #3 bolth were dead swaped so red was #3 orange #4 and got spark on 3. Just confuses me since red sparked 1&2 today why doesn' it spark #4 ?

Jerry I have black cdi packs and black ignition coils.

 

[Stokes760]

Ski dad. That' why in trouble shooting you disconnct the white kill leads right? Should the front cdi leads be pluggd into coil packs 1&3 then?

 

[jerryjerry05]

Did you swap the packs completely?
You need to do that.
Then if you have no spark on #2 then you need a pack.

 

[Stokes760]

Not yet Jerry I only get some much time to "tinker" befor the mrs gets on my case. But it will be the next thing i do. I'l be sure to update

 

[Stokes760]

Swaped the cdi packs completely didnt have spark on 1&2. Safe bet cdi is bad

 

[jerryjerry05]

Spark did show on 3/4?
Then the packs probably bad.

 

[Stokes760]

Yes spark on 3&4. Bolth packs bad?

 

[SkiDad]

no just 1 pack is bad. Buy it from outboardignition and you get a 3 year warranty.