The GE B23-7 is a diesel locomotive model that was first offered by GE in late 1977. Featuring a smaller 12 cylinder version of the FDL engine, it is the successor to GE's U23B produced from early 1968 to mid 1977, but at long is exactly . longer. It competed with the very successful EMD GP38-2. General Electric also produced a variant, the BQ23-7, No. 5130-5139, for the Seaboard Coast Line. A total of 536 B23-7's were built for 9 U.S. customers and 2 Mexican customers.
Preservation Ohio Central #4092, a B23-S7 "Super Seven," is owned by the Age of Steam Roundhouse in Sugarcreek, Ohio. It was rebuilt from former Western Pacific U23B #2252.
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