I LIVE IN SOUTH CAROLINA I HAVE A 2000 CARAVELLE WITH A 4.3 190HP MERCRUSIER. EACH YEAR I HAVE DONE THE WINTERIZING MYSELF AND STORED THE BOAT ON SHORE IN A STORAGE UNIT. i HAVE HAD NO PROBLEMS TILL THIS YEAR I PULLED THE BOAT OUT AND GOT IT READY FOR THE WATER, WENT OUT AND FOUND THAT THE ENGINE WAS CRACKED. I TOOK THE BOAT TO THE MECHANIC AND OF COURSE FOUND THAT IT WAS FROM FREEZE DAMAGE. I DRAINED EVERYTHING THE SAME AS I DID EVERY YEAR. IS IT POSSIBLE FOR THE DRAIN TO BE CLOGGED OR FOR SOMEONE TO PUT WATER BACK INTO THE ENGINE(I HAD SOME PROBLEMS WITH SOMEONE VANDALIZING THE BOAT IN THE PAST).