Smooth Running:Good at mixing fuel and air, keep engine running smoothly.engine runs well maintain. Applicability:Carburetor is great replacement for Briggs & Stratton 491031, 491026, 281707, 12HP Engine Carb Fuel Saving: This carburetor is useful to avoid oil waste to some extent Easy To Install:This carburetor and fuel tank assembly is very durable and also has good working effect.Easy Installation:This is aftermarket spare part.Reliable quality and delicate workmanship persuades you to take this one to replace the old one About Shipping: All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances.Any questions, please feel free to contact us During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours, wish you a happy shopping Thanks for your cooperation and we'll make you feel satisfied.