If the hull, seat, and hood are in good shape and pretty or can be easily made pretty you have a worthwhile opportunity. Plan to go through the whole ski, front to back, check/repair everything. Considering sending the engine off for rebuilding. You'll easily spend close to rebuild cost trying to do it yourself. It will cost you about $1500 to get the ski in top shape (you'll spend that amount on any 951 powered ski). Then you will have at least a $2500 ski that is reliable. That's my logic anyway.