For sale: Blackstone 16 HP valve springs, brand new! - **Code**: 5044 **Specifications:** - Brand: AECO Product, 100% original, made in India - Fits: Blackstone JP 16 HP, air-cooled - Quantity: 6 new boxes in carton **Note**: This part makes a difference if the generator starts cutting out or lacks torque. Weak springs can cost you a complete engine.