Okay! Fuel is finally being delivered! After dealing with parts lost in the mail, defective filters, and unscrupulous eBay vendors...I was finally able to get the pump assembly sorted!
But, the rear cylinder still does not fire, of course. I know fuel is reaching the rear cylinder, because the spark plug was wet. It is however, quite black. Can I clean or should I just replace? Previously, I checked the rear cylinder's ignition coil resistance. It passed. I can not test the the peak voltage right now, not sure how without specialty tools.
So what should I do first to test that the spark plug is getting a spark?