Onan 5000 won't start

Well, I got a little time today to work on the genset. Got enough sheet metal off that I had access to the oil pressure switch. I pulled the lead off. Still no start. I rechecked spark and noted that I got some spark right after I took my finger off the start button as the engine slowed to a stop. Put the plug back in but still now start. Sprayed some ether into the intake but still no start. However, it would fire once or twice after I took my finger off the start button and as the engine cranking slowed to a stop.

I've take all the bolts and exhaust loose so that I can slide it out tomorrow. Then I will check the coil. Hope it's that and not some control board.