1995 mercury 60 misfire

[Ruderider]

i have a 1995 mercury 60 that suddenly started to misfire, i found one of the groundcables to a ignitioncoil loose and retightened it but the misfire is still there.
i have meassured resistance on the coil and the resistance on the primary coil should according to the manual be 0,02-0,04 Ohm and mine is 0,05, could this little difference be the source of problems or?

 

[JDusza]

Hey.
CDI has a great ignition troubleshooting guide. Their manuals are available on line at their website.
I would check the coil input and output using a DVA and a peak hold DVM. Also try unplugging one spark plug at a time. Performance will drop even further by pulling a functional spark plug. The plug removal that DOES NOT change performance is the bad coil.
Get yourself to CDI.
J

 

[Ruderider]

yes, but still i have the Q, is it the Coil och the switchbox that is failing?

 

[Ruderider]

the Switchbox have been exposed to a failured coil due to lack or intermittent grounded coil

 

[James R]

jduzsa is correct to direct you to the CDI test procedure. If you dont do the tests any answer would only be a guess. If you are unable to do the tests then you must find someone who can. The alternative is to throw money at it.

 

[JDusza]

CDI and DVA and DVM.
Get the data.
J

 

[Ruderider]

got some data today, but i coudnt get DVA with my cheap multimeter, but tomorrow i have a Fluke that can handle this, one thing i found out is that the stators resitance is a bit high the red cable should have 75-90 Ohm and mine is 110, and the blue wire should have 3250-3650, mine have 3750, is this bad or?

 

[Ruderider]

another thing, when i meassured the incomming voltage from the CDM to the coils, i got at first a very hig number i guess, then fast it stabilized at 15 volt and the manual says atleast 150v is it the peak that should be 150v, or?
Another thing i tested was if there are any current on the Black/yellow killswitch, and when i release the start with the keys, i got up to 8v. on the killwire and that i suppose is not good at all