Ive done a few.Just did one few weeks ago.My neighbor has a automobile window biz and we do favors for each other from time to time.I saw him pulling and pulling on his weedy and it would run then die.So i ask whats up.Says to me hes had 2 peolpe look at it and there not sure what it is.One has a small yard biz.This is one of those green machines or weedie brand that has the pump bulb mounted on the side of the housing.I pump it and theres air bubbles in the bulb.I go home and come back with a piece of tygon,the small line,put it between bulb and carb.Been running great ever since.Took me 30 seconds.