1. Did you run the eng dry of fuel or leave treated fuel in the eng? Two yrs is not long with proper care.
2. If the eng was run dry of fuel or left with treated fuel 2 years you might not have a fuel issue.
3. If it ran good before sitting 2 yrs, IMO it should start and run now but will need yearly minor maintenance
checks and any needed replacements.
4. I would say connect a hot Batt, use fresh fuel, drop it in a deep barrel try it and work from there.