1840 Not Starting

I have posted in the past regarding the cold start solenoid, which I have replaced. Anyway, long story but machine still not running and frustration level high as I'm not mechanical, so learning. I finally have a service manual, and someone coming to give me some help. I'm hoping someone out there can lead me in proper direction. I have changed fuel lines, lifter pump, fuel filter, as previous owner dumped ??? into fuel resulting in it smelling of varathane and machine sat for a long...

1840 Not Starting

1840 Not Starting