I have a 2001 Yard Machine with a 14.5 HP B&S IC Quiet that is nearly dead...I also have a Craftsman with a 15 HP B&S IC Gold that has been sitting for 10 years or so. Will they interchange? Do you all think I should replace the seals and gaskets in the 15 HP since it has been sitting so long? It does turn by hand easily and ran good before it was left to sit. I'm not sure of the year...around 98/99 I'd guess. Would the carb interchange? Thanks all. P.S. I do have all the numbers wrote down if needed.