The CV25S-69539 has a 1" x 3-5/32" Shaft. The 69539 supercedes to the CV730-0006 which is no longer available. You may be able to use the Cv730s-0043 engine which has the same mounting and shaft size. There may be minor changes but parts should be interchangeable from your old engine. This unit also came with a CV25S-69513 which has an 1-1/8" x 4" shaft. You could use the CV730S-0039 that has a longer shaft on it and cut the shaft down as needed. It is not hardened steel and the shaft is drilled and tapped 1" deep. There may be other minor differences but parts should be interchangeable as needed.
