If your older model is not listed here it is no longer offered from SeaDoo. Prices include a core charge of $180.00. To avoid a core charge you may send us your core prior to ordering. Your core refund will be applied to the credit card used for the original purchase. Some 1988 and 1989 models may require some case cleaning due to larger rods on updated crankshafts. Your Core : MUST BE RETURNED TO US WITHIN 30 DAYS and MUST INCLUDE A COPY OF YOUR INVOICE. The core must be intact and not disassembled. The threads & woodruff keyway cannot be damaged to receive your core refund. Welded crankshafts are not rebuildable and cannot be returned. Core must returned freight prepaid, No CODS will be accepted. Your core credit refund will be issued after approval from SeaDoo / Bombardier Corp This may take up to 90 days.