The Echo 43700239130 is a genuine OEM oil pump designed for various Echo chainsaw models. This essential component ensures proper lubrication of the saw chain and bar, critical for efficient cutting performance and extending the life of your chainsaw. It is a direct replacement part for models including CS-3000, CS-3400, CS-3450, CS-346, CS-300, CS-301, CS-305, CS-341, and CS-340. Replacing a faulty oil pump with this authentic Echo part restores optimal lubrication, preventing premature wear and damage to your equipment.