Each new engine sold by Mud Buddy Motors is covered by a 1-year frame warranty and a 5-year casting warranty. Powerhead warranties vary depending on the type of motor purchased. Briggs & Stratton offers a 3-year power head warranty. Kohler also offers a 3-year power head warranty. Performance motors, such as the HDR 5000 come with a 1-year power head warranty. Check with your local dealer for more warranty information. Warning: unauthorized modifications to your motor may void your warranty. It is highly advised you contact customer service before making any changes or upgrades to your engine. All warranty repairs must be completed by a certified Mud Buddy repair/service shop and approved by Mud Buddy Motors. Contact customer service for questions.