[honest mark]

called cummins here in michigan, i have a 2003 tiara with cummins qsm11 engines, have 900 hours on it and have not had the aftercoolers serviced yet, they asked me if there are any leaks or running hot , i told them no, its running perfectly, they mentioned i may wanna just use a new product called BARNACLE BLASTER?????  very less exspensive than having cummins come out and change o rings and then servicing and acid wash the after cooler, has anyone done this ??? it was in saltwater for the first 800 hours and then  about 50 hours freshwater here in michigan???? just surprised cummins recomended it????? any thoughts???