Other items for sale include five float boats, a riding lawn mower, golf cart and box truck.
Larson said he would operate the marina until the sale is closed, typically 30 days after the auction.
Larson opened the marina in 2007 with then-partner Danny Hankins. He also owns Broncor, a health care company that provides interoperative monitoring for surgeries involving nerves.
Larson said he would continue to operate Broncor, which employs 35 people.
Bill Grimes can be reached at 217-347-7151, ext. 132, or firstname.lastname@example.org.