Ignition coil problems ?

[laredoggg]

hello everyone, i have a 1975 evinrude 70hp. this motor doesnt seem to be kicking out enough power. all 3 cylinders have 110 lbs of compression.
i tested the ignition coils by unplugging the wires from each spark plug while the engine was running. the first two i pulled off, the engine idled down but the third one i could not pull off because i received a pretty good shock. is that an indication my ignion coil could be faulty ? please repy, thankyou ! ~ larry

 

[tmcalavy]

Re: Ignition coil problems ?

Hope you did your test with rubber gloves and pliers with insulated grips...otherwise you're taking a chance on a trip to the hospital, voltage is not a good thing around water. If you can run it at night, you'll see right away if that plug wire is leaking current...sounds like it is. The fact that you took a jolt tells you the coil and its sister components are doing they're job, creating voltage...but it may not be reaching the plug/cylinder. Check the wires and plugs. If you can pull a plug wire when it's running and nothing changes in the way it runs, you have found a dead cylinder/suspect.

 

[laredoggg]

Re: Ignition coil problems ?

i did pull the plugs off with a rubber handled pliers but still got jolted. i stopped the engine then pulled that plug wire off, re-started the engine and it did sound like it was missing ! i havent tried running it at night yet. but for a $25.00 coil i may as well just replace it ! ~ thankyou

 

[tashasdaddy]

Re: Ignition coil problems ?

don't buy part you don't need. stopping the motor does no good, you have to pull the wire, without touching the metal on the pliers.

 

[karlow1]

Re: Ignition coil problems ?

Have you replaced the plug? Did you pull it and take a look? You can also try swapping the plug with another cyln to see if that effects it (problem moves to another cyln).