Motor is a 1988 DT175, ran fine last time out, this time it seems to not be running on starboard bank. I am trying to see if there is an opinion about where I would start looking, before I go thru the entire ignition. I have had a water flow sensor fail and got real rough runnig and limited to 3000 rpm. This time it is not getting over 1800, and no alarms or lights. Any thoughts?