I think you carby might just need a good clean out treatment, also the year old fuel won't be doing any favors, best to run it down to about 1ltr when not being used and put excess fuel in the daily or mower. Fuel loses it's octane after a month in the tank from evaporation, you were prolly running on about 36ron haha.

Silver van looks nice, dunno how the chute will work with the back door being in pins . Yellow van,I thought it was old one from 6yrs ago but no, it's in Sydney last I heard..