Will Not Start

Joined
Jun 9, 2009
Messages
16
At first mercury 40 hp would not idle unless I give it a little throttle.
When I remove plug wires from cylinder 3 or 4, engine continue to run. Removing plug wires from cylinder 1 or 2 causes engine to die out. Engine run when giving a little throttle. I have limited skills on engine repair. I did replace the switchbox and stator on this engine last year.
Checked compression on all cylinders and compression good. Spark good on all plugs.
I put a kit in lower carb today now engine will not start. Compression, spark still check good. What could have happened when I put kit in carb?
Thanks
 
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