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Barrette's Small Engines Inc. - SmallEngines.ca FAQ's
What would cause the primer bulb to crack/turn gummy?
Typically, the primer bulb begins to deteriorate once the fuel becomes stale. Ensure that only clean, fresh fuel is used in the engine, and that it is treated with a fuel stabilizer such as Briggs & Stratton Fresh Start Fuel Stabilizer (part # BS 100002).