Smartcraft "blk psi ckt hi" code
 

Just got this code on our port and center engines (Merc racing 700's). Can't find what it means on google. Both those engines were running considerably low water temperature ~115 degree vs strbd at 170 degrees. Oil temps were all same.

These two links should get you headed in the right direction.:) Good luck.

http://www.justanswer.com/boat/760yk...-hours-it.html

http://boatinfo.no/lib/mercruiser/ma...s/page_l65.swf

Using Merc CDS diagnostic tool your code will show Sea Pump Pressure Circuit High - in which is the same as your Smartcraft " BLK PSI CKT HI " code. This code will still allow the engine to have 90 % power as the engine could go into 10 % guardian mode. The common fix for your code is block pressure sensor circuit shorted. Its either a wiring / connection problem or the sensor itself problem or both.

Oh now I see the poster above already showed you the problem as I just clicked on his links anyways either info should help you. My bad.