90 Sport - No Spark

Character building,not embarrassing. Embarrassing is if you took it in and paid to have it "fixed". Glad you figured it out

Some EI's automatically limit the current flow.

I have prestolite EI & don't use resistor.

Tom - a quick check is to manually ground out the (-) side of coil (with key on) & see if it generates a spark when you relese the ground (same as points do).

Don't understand checking the key you said you have power as far as the coil?
Did you replace the coil with the same "exact" coil?
Zach     
If you’re running 12V direct to the coil don’t you need to use an resisted coil since your bypassing the ballast resister?
And I’m with Zach check power at the EI it may have sh!t the bed.

Just checked the resistance of the ignition switch - 0 ohms between red and purple (as expected) and 33 ohms between red and yellow/red. Looking for a ground under there to check V... does CC use black for ground?

If it is EI it will probably have power at the coil. Sometimes points close and ground the coil and you won't see power feed at the coil positive. Remove it from the coil for a proper power reading.


You can test your EI with a simple test light.

Remove the wire from the EI that goes to the negative side of the coil. Connect your test light to a positive feed and insert the other end of the test light into that EI negative coil wire. Crank the engine, the light should flash on and off at the same pace as the engine cranking note. If it densest flash the EI isn't working.

Some sort of points replacement EI that was in the boat when I got it. (six years ago) Embarrassing question - should have +12V on the "+" side of the coil when the key is on?

My 90 Sport has been running perfect for years, hit the ramp today and it wouldn't start. After some debugging (gas? spark?) found no spark from the coil. Removed the old one, had oil on it so pretty sure it was toast. Replace it, still no spark. Where should I look next?

Tom