Mercruiser inline 4cyl. 3.7L conventional Ignition.
For some reason I only have spark coming out of one post from the distributor cap. Originally I had no spark, then I did a tune up (cap, rotor, points, condensor). Now after doing that I have spark but only out of one post from the cap. I'm going straight from the cap posts to my spark tester to an engine ground, I'm not using any plug wires or spark plugs for this test. For some reason the book tells me a different dwell measurement than what is written on the engine but I tried the dwell in both positions but got the same problem. I am out of ideas as to why spark would come out of one post but none of the others. Any one have any ideas? Could I just have gotten a bad cap?
For some reason I only have spark coming out of one post from the distributor cap. Originally I had no spark, then I did a tune up (cap, rotor, points, condensor). Now after doing that I have spark but only out of one post from the cap. I'm going straight from the cap posts to my spark tester to an engine ground, I'm not using any plug wires or spark plugs for this test. For some reason the book tells me a different dwell measurement than what is written on the engine but I tried the dwell in both positions but got the same problem. I am out of ideas as to why spark would come out of one post but none of the others. Any one have any ideas? Could I just have gotten a bad cap?