Could this ignition coil cause any damage?

[Drymite]

So i had extra ignition coils that are brand new for my 1987 Force 85. They look identical to the one coil thats on my 1969 Evinrude 85hp. I decided to try it out since i have 3 brand new ones instead of buying a specific one for the evinrude. I hooked it up it fired great and operated like it should. Is there anything i should worry about?

 

[Nordin]

Does the Evinrude have CD (electronic) ignition?
From my experience CD ignition system ignition coils has lower resistance at the secondary side then regular magneto system with points and condenser.
Magneto system has about 5-8 kOhm resistance at secondary winding and CD system about 5-1200 Ohm depending on brand.
I would suggest you to check the resistance of the coil for the Evinrude and check the resistance of the Force (I think it is about 5-600 Ohm at the Force coil). If they are about equal and the Force coil fit the Evinrude by the mounting then go with them.

 

[Drymite]

No the evinrude is running on points. I noticed even the right part number is also CDI electronic but for 1969 and some early 70s.
Thanks, i will check the resistance on the coils.

 

[Drymite]

Resistance was almost identical. I noticed on my owners manual it refers to the ignition as C.D ignition . I didnt know evinrude used C.D.I since 1965

 

[Nordin]

What is the value of the secondary winding?
If it is in range 5-8 kOhm it fits magneto ignition with points.
If it is in range 500-1000 Ohm then it is for CDI ignition.

 

[dingbat]

If it is in range 500-1000 Ohm then it is for CDI ignition.

Don't confuse a ignition type “capacitor discharge” with an aftermarket manufacturer of ignition components, CDI Electronics

 

[Nordin]

My experience is that CD ignition system has coils with lower resistance at secondary winding.
Chrysler/Force, OMC and Mercury has 500-1200 Ohm for CD ignition coils.
All magneto I have worked with Mercury, Chrysler, OMC, Yamaha, Suzuki etc.
Have secondary winding resistance at 5 kOhm and higher.

 

[ct1762@gmail.com]

My experience is that CD ignition system has coils with lower resistance at secondary winding.
Chrysler/Force, OMC and Mercury has 500-1200 Ohm for CD ignition coils.
All magneto I have worked with Mercury, Chrysler, OMC, Yamaha, Suzuki etc.
Have secondary winding resistance at 5 kOhm and higher.

OMC is completely different. primary has like 0-1.5 ohms, secondary around 225-350 ohm. put a 1200 ohm coil in it and the voltage would go through the roof and burn out the charge coil i'd think.

 

[Nordin]

No way the secondary resistance can affect the charging coil.
The charging coils circuit is the input of the CD box/switch box and the CD box/switch box output channels circuit is the primery winding, the voltage can not go backwards.
The ignition coil and all coils are a step up komponent.
It transform a low voltage to a high voltage relative to the windings resistance. Primery windings are 0,5-1,5 Ohm (not 0 Ohm as described in post #8, that is a dead short circuit) at most ignition coils.
The secondary winding is setting the limit of the output voltage to the spark plug.
BTW: In this case the resistance was almost identical, post #4.

 

[Drymite]

im not sure if im correctly checking the resistance but this is what i did i put my multimeter on ohms
So i checked the resistance by connecting one probe of the multimeter to the positive terminal where power meets the blue ignition wire. And also has the.coil (signal wire) not sure the correct term and other probe to ground on the coil pack 0.8 on both coils
Secondary i connected one probe at where the spark plug wire goes and and the other probe to the positive ignition terminal.
Which was 2700 ohms on first coil and 2800 ohms on the second

 

[Nordin]

No, you are measure in the wrong way. But it does not matter if you measure the secondary winding putting the black or red probe to ground or the thin (blue) control wire from the ignition system and the other probe to spark plug boot.
You should measure the secondary winding between spark plug boot and ground course the secondary circuit is the secondary winding through HT wire and through spark plug to ground.
The primery winding have so low resistance (0,5-1,5 Ohm) relative the secondary winding.
0,5-1,5 Ohm more or less at the secondary winding does not matter.

 

[racerone]

Number of turns of magnet wire in the primary and secondary determine coil performance.-----Order the correct coil for the motor.

 

[Drymite]

yeah i ended up ordering the coil that matches my outboard For peace of mind . Thanks for all the help

 

[ct1762@gmail.com]

No way the secondary resistance can affect the charging coil.
The charging coils circuit is the input of the CD box/switch box and the CD box/switch box output channels circuit is the primery winding, the voltage can not go backwards.
The ignition coil and all coils are a step up komponent.
It transform a low voltage to a high voltage relative to the windings resistance. Primery windings are 0,5-1,5 Ohm (not 0 Ohm as described in post #8, that is a dead short circuit) at most ignition coils.
The secondary winding is setting the limit of the output voltage to the spark plug.
BTW: In this case the resistance was almost identical, post #4.

yes i understand how the systems work, and the packs have diodes to stop current reversing. the manual states 0 (not open. just where the meter reads 0.00 or no resistance) to 1.5 ohm so very small. i was of course talking about the primary side. my thought was if the voltage is higher than the diode can handle, it would melt the scr switches and go back into the charge coil but probably not correct other than burning out the pack! just 2v or more on the kill circuit is enough to burn out the scr switches. obviously i am no electronics engineer just know what the effects are most of the time