First off, when on the hose, only run it at idle. It should fire if it is running right, even with just one plug in. I can't tell you if there is a problem in that cyl with out know the compression. You could be over heating it running it at the rpm on the hose.
I have no idea how I ruin this engine..
Did a engine compression test this morning cold.. 120 on pto side and 58 on mag side. I thought I did everything right on that top end. Don't have a clue how I ruined it
Well mystery solved I destroyed a brand new top-end not really sure how it happened? Is bore went over prime the pump clean fuel. Ordered a new top end kit waiting for it to arrive taking The Jug over to get bore 1.5 over... some saying it was running too lean I have no idea what the check once I rebuild again this thing was running for all of 40 minutes after everything was brand new put on top.