About Sierra Sierra is dedicated to protecting you and your investment. For 50 years Sierra, one of the most trusted names in the marine industry, has proudly been offering high quality engine and drive parts. Their products meet or exceed the original equipment part it replaces and are engineered to meet today's high horsepower engine demands while withstanding the harsh marine environment. Sierra's customer satisfaction warranty all Sierra parts qualify for sierra's industry leading customer satisfaction warranty. Sierra warrants its products to be free of defects in workmanship and materials for the useful life of the product. If a Sierra product fails to comply with the warranty, Sierra will repair or replace the defective product free of Charge. The warranty is Subject to additional terms, conditions and limitations. You can view sierra's full warranty located above in the technical specification section.