Running on 2 not 4

[captainserious]

I have a 1973 V4 115HP Johnson. The #2 & #3 cylinders are not firing although I see a spark when the plugs are grounded to the cylinder head. When starter ether is added through carb it acts like its running on all for. What part of the ignition system is faulty?

[boats.net]

If you are getting spark at all 4 spark plugs, the ignition system is not the problem. If you spray either through the carburetors and it runs good, then you have a carburetor problem.