Difficult cold start

The link to 1920 manual Dan provided,go to page 5 of pdf. Under adjustments during assembly,figure 15 wet fuel level testing.Put that info in your tuner note book.If bowl is dry or fuel level is below spec,add fuel threw economiser opening.
Also page 6 of pdf Vacuum kick pull downadjustment,figure 16 and 17. check vacuum pull off,see if holds vacuum