Between 3100 and 3400 rpm my 175 hp EFI Mariner reaches hight temperatures.<br />Over 200°C, in the red area! <br />Between 3200 and 3400 rpm the engine makes a very strange rattle <br />noise. This problem occures since the beginning.<br />The dealer who sold me the boat says that it is normal.<br />How can i be sure?<br />Purchase date : january 2003<br />Model number : 7-175413JD<br />Number of running hours : 85
