We have completed our renovation of the Kitfox IV we picked up a few months ago (last condition inspection was in 2013) . Engine ran fine during our pre-buy inspection in April. Has had no fuel in the system since then. Has a 582 blue head engine. When we attempted the engine start, got a lot of excess fuel coming out of the air cleaner. Engine only runs (for a minute or so) when fuel pump and fuel valve are turned off. When turned on, engine floods and dies almost immediately and raw fuel appears to run out of the overflow orifice (center port in the intake of the carb) . Has had only 100LL, no mogas with alcohol. I pulled the bowl off one of the carbs. No debris, floats are good, float needle looks OK, but seems to not be shutting off the gas when the bowl fills up. I'm thinking it may be the float needles(s) need to be replaced due to length of time since last had fuel in the system, even thought they look OK. Any suggestions or comments on the subject would be appreciated. Thanks!