I HAVE THIS LITTLE ST1600 TRACTOR WITH THE KE85 2CYLINDER IM WORKING ON FOR A ELDERLY LADY AND IT'S FILLING THE CRANKCASE WITH DIESEL "FULLCRANKCASE" SO MY THOUGHT IS THAT THE IN INJECTOR PUMP HAS A BAD SEAL OR SOMETHING FOR HOW AND WHERE IT IS MOUNTED AT WOULD LIKE SOME INFO ON THIS AND...