SBT assumes no liability for labor charges or damage to other components or assemblies resulting from failure of the engine. This warranty does not apply to an engine which been subject to modification or has been disassembled, including, but not limited to, removal of the head. Any warranty work performed by SBT does not extend the original warranty period of either one (1) year or two (2) years from the date of original purchase. The express written warranties set forth herein constitute the only warranties made by SBT in connection with this transaction. As noted herein below, all other warranties, express or implied, including warranties of merchantability and fitness for a particular purpose, are expressly disclaimed. All limited warranties specified herein are conditioned upon Buyer's immediate notice to SBT of the alleged fault or defect.This warranty does not apply to personal watercraft (PWC) used for rental or commercial purposes. SBT offers no warranty for PWC's used for rental or commercial purposes. Your account must be current and in good standing before SBT will perform any warranty work.