1976 / 77 -- 9.9 Hybrid -- CDI Ignition Questions

[perkdp]

Hold on to your hats......

1976 (10624G) 9.9 Evinrude with a magneto/electronic ignition from a later model, assumed to be, 1977. The motor would run up to half throttle and die. Both stop switch wires have been been cut away from the plug to the power pack. The plugs on the power pack wires to the coils have been replaced. Here are the diagnostic details .... I hope you can follow...

* With sparkplugs removed, and hand held against head, pull rope, no spark.
* Unplug a wire from the power pack to a coil, hold the power pack side of
wire near the head, pull the rope, spark will jump from that wire to the
head.
* Leave the power pack to coil wire unplugged, pull the rope, hold the
sparkplug against the head, touch the power pack to coil wires back
together, spark jumps from the sparkplug to the head.

Does this sound like a problem with the power pack, or the sensor ?

Assuming one wanted to take this motor back to points and condensers of 1976, will the flywheel interchange between the 1976 and 1977 model ?

Any guidance is appreciated.

 

[Rick.]

Re: 1976 / 77 -- 9.9 -- Bad Spark

Re: 1976 / 77 -- 9.9 -- Bad Spark

I'm not going to touch this with a 10 foot pole. Someone more knowedable that I will be along to help you out I'm sure. The one thing I woould say is about the kill switch wires. Only one of them goes into the plug, the other goes to ground at the base of the power pack. Not sure why they would be cut unless the switch was bad. . Good luck. Rick.

 

[Rick.]

Re: 1976 / 77 -- 9.9 -- Bad Spark

Re: 1976 / 77 -- 9.9 -- Bad Spark

Bump. Isn't anyone going to touch this? Rick.

 

[perkdp]

Re: 1976 / 77 -- 9.9 -- Bad Spark

Re: 1976 / 77 -- 9.9 -- Bad Spark

Thanks Rick for your acknowledgement. I knew this was ugly but thought / hoped I'd get some guideance.

It seems to me that the capacitor in the power pack is charging when the flywheel turns but when the wires are connected like they should be, the capacitor is draining before it fires the coil & sparkplug.

I'm just not familiar enough with the CDI type ignitions to know what may be causing the power pack to drain.

Does the sensor complete / ground the circuit to cause the sparkplug to fire or does it over charge the capacitor just enough to force it to drain. Either of these seems like a sensor problem.

Or is the power pack / capacitor grounded internally by one of the coil wires causing it not charge when the coil wire is connected.

I have some testing procedures for these parts but it talks of a special meter that I do not have.

 

[Rick.]

Re: 1976 / 77 -- 9.9 -- Bad Spark

Re: 1976 / 77 -- 9.9 -- Bad Spark

http://www.jetav8r.com/Vision/Ignition/CDI.html
You can have a look at this site and see if there is anything to help. I thought I had a website for CDI bookmarked but can't find it. I'm sure there are guys on this forum that have the right answer. Chances are they just haven't seen your post. Perhaps you should change the title to something like " spark problem - CDI ignition help required" Keep trying. You could also send a private message to some of the top guns of the forum. I don't think they would mind. Rick.

 

[Rick.]

Re: 1976 / 77 -- 9.9 -- Bad Spark

Re: 1976 / 77 -- 9.9 -- Bad Spark

http://dolphinmarineservice.homestead.com/ign1.html

Also found this. Rick.

 

[perkdp]

Re: 1976 / 77 -- 9.9 -- Bad Spark

Re: 1976 / 77 -- 9.9 -- Bad Spark

Thanks again Rick.

I'll create a post under a different title

 

[tashasdaddy]

Re: 1976 / 77 -- 9.9 -- Bad Spark

Re: 1976 / 77 -- 9.9 -- Bad Spark

double posting is not appreciated on the forums.

 

[perkdp]

Re: 1976 / 77 -- 9.9 Hybrid -- CDI Ignition Questions

No help on this ??

My first disappointment on this forum .

 

[perkdp]

Re: 1976 / 77 -- 9.9 Hybrid -- CDI Ignition Questions

Bought one package having timer plate, charge coils & sensor off a 1977 25
and another having a power pack and coils off a 197x 4 horse (verified the part # on brp site before bidding). Mounted the timer plate and power pack, wired the old coils back into the proper connectors (the plug wires on the 4hp coils were two short to use and knew the original coils were good).
Fired right up. Runs like a champ. Now I have a 197677-99425

 

[Rick.]

Re: 1976 / 77 -- 9.9 Hybrid -- CDI Ignition Questions

Good work. Glad to hear your back up and running. Rick.