A repair shop has a 1991 DT 25hp Suzuki with a blown head gasket. Repair shop said past owner boated in very shallow water and clogged water intake. Didn't hear any device or see any lights indicating the motor was getting hot. Shop is going to replace gasket after having head milled. Piston's didn't seise(sp) or score the cylinder walls. If I were to purchase this motor what other problems could this motor have? <br /><br />TTP