The governor on a small engine controls the engine speed. If the engine runs too fast on a small engine, it could result in catastrophic failure. In the case of a small engine, it can actually break apart if it runs too fast. Repairing a governor and replacing the springs is the same for all brands. If the springs stretch or break on the Weed Eater lawn mower, you must replace them to keep the engine from running too fast. It only takes a few minutes t replace them, and simply ignoring them can mean having to replace your lawn mower. Repairing a governor and replacing the springs is the same for all brands.