Re-new all parts
Reading & understanding your Best Friend (shop manual) If you are mechanically apt,
you could remove the jetpump, then engine, then break it down to a Short Block,
core trade that, rebuild all the components, like machine RV cover, Carb(s), and fuel
delivery system, and basically go over everything while you await arrival of a new
rebuilt Shortblock. This includes so many things like cleaning tank, replaceing fuel lines, selector valve, wear ring & JP bearings if needed.  All mentioned, will insure a full life of the new engine. Bills86e
Yes, exhaust nipples, hoses, stator clean, starter brushes, ect. ect.