EOS Quattro engines are covered by EOS Engine 1 year warranty from the date of purchase. The replacement of the parts under warranty is carried out by one of our expert dealers. They will ensure that your EOS engine receives the care that deserves. There are certain procedures during installation and operating hours that need to be followed for the warranty to be valid. Please refer to the most current published manual to follow these procedures. The manuals can be found here. The spare parts are shipped from EOS company in Austria and are always in correct package. Our dealers are equipped with the correct tools and are ready to provide necessary assistance.  We strive to provide quality after purchase service, for you to be satisfied with your engine.