1977 115 hp CDI power pack

[boatbickle]

Same troubles, just trying to get a grasp on it. 1977 evinrude 115 model #115793s, New power pack is 113-1731 and replaces the one that was on my motor.No spark at all on old pack, I put on new pack and this is what I have, No spark on #2 coil. swaped the orange coil wire on #2 with one on power pack that has fire. #2 coil has fire if I swap it. I have fire on all coils except #2. Bad pack? or could it be somthing I am overlooking.

 

[daselbee]

Re: CDI power pack

The timer base tells the pack when to fire each cylinder. If I understand you right, you can get all pack outputs to fire by swapping around, so I would say that the trigger signal for #2 is missing coming from the timer base. Either a broken wire / bad connector/ or a bad timer base.

Looking at the install sheet from the other post, I think that would be connector screw terminal #2. Swap (for testing) the black/white wires on #2 and #4. If spark comes back on cylinder #2's plug (and goes away on #4's plug), there is a problem with that black/white wire from the TB or a bad TB itself. Note if the spark is there, it will be out of time...this is only for testing. Won't hurt a thing.

 

[boatbickle]

Re: CDI power pack

Ok, I cant get #3 on the pack to fire. #3 on the pack is #2 coil in the firing order. All coils are good. No coil will fire on #3 on the pack. should I still do what you said. I get fire on 3 of my coils but not on the one connected to #3 on the pack.

 

[daselbee]

Re: CDI power pack

It sounds as if you are concentrating on the outputs to the coils right now, switching them around, etc.....which is good...nothing wrong with that...
But, switch your attention to the input side, the black/white wires from the timer base. #2, #4, #9, #12. Hook that #3 up properly, (you will not have a spark, right?) and then swap one of the working inputs to the screw #12 input for cyl #3. See what I am saying? If spark returns on cyl #3 when using , say, cyl #1's input (screw #9) from the timer base, you have an open in the black/white wire that normally connects to screw #12, or a bad timer base.

remember, the timer base is telling that power pack exactly when to fire each cylinder. One dead cyl, when using a new pack, tells me the input circuit is wrong....

I am going by the CDI drawing / install sheet from the previous post.

http://www.cdielectronics.com/InstallSheet/113-1731.pdf

 

[boatbickle]

Re: CDI power pack

Thanks for all your help, I have been messing around with it for days and now it works. just for no reason it started to fire. WTF. Tomorrow I will be taking it to lake to see if it runs good. thanks for everything. The motor has been sitting for over a year, maybe that had somthing to do with it?

 

[Ray sourwine]

Re: CDI power pack

It sounds as if you are concentrating on the outputs to the coils right now, switching them around, etc.....which is good...nothing wrong with that...
But, switch your attention to the input side, the black/white wires from the timer base. #2, #4, #9, #12. Hook that #3 up properly, (you will not have a spark, right?) and then swap one of the working inputs to the screw #12 input for cyl #3. See what I am saying? If spark returns on cyl #3 when using , say, cyl #1's input (screw #9) from the timer base, you have an open in the black/white wire that normally connects to screw #12, or a bad timer base.

remember, the timer base is telling that power pack exactly when to fire each cylinder. One dead cyl, when using a new pack, tells me the input circuit is wrong....

I am going by the CDI drawing / install sheet from the previous post.

http://www.cdielectronics.com/InstallSheet/113-1731.pdf

Hello I'm having this exact problem except it coil #1 not firing I've done everything up to exchanging the white/Blk feed wire I still have NO Fire on #1. So if I'm figuring correct that should mean the power pack is bad..

....right