More like 24-2500 to fix. Just had mine done (‘03). Didn’t show any signs of corrosion, but I wanted to sleep a little better. In my 3rd season with . Original owner put 400 hrs on. I’ve got it up to
720 now. Provided you don’t have that issue or the oil pan / t stat corrosion it’s a great motor. At least it’s been for me. Quiet, good enough power. ( ‘03 Scout 235) Longevity wise, I can’t help you on.