Everthing. 2000 Ski Nautique GT40 Just got done replacing rear main oil seal and damper plate. Had the "rocks in a can" noise only between 700-900 rpm when in gear. Replaced oils, filters and impeller. Polished, waxed, deep cleaned carpet and vinyl. With a heated garage and my old job experience of turning wrench's years ago I actually enjoy it and it gets me through the winter. Parts by Skidim always.