Hi all,<br /><br />Ive been having a problem with my 2003 200 hp Optimax. Symptoms are as follows:<br /><br />Temp never exceeds 125 F should be greater than 130<br />Cylinders 5 and 6 are wet with fuel (but seem to be fireing)<br />Prop hub has black residue from exhaust <br />Moderate vibration between 1000 and 1500 rpm <br /><br />To date the thermostats, popet valve, compression, fuel/air pressure and the electronic components have been tested and all are ok. Can anyone offer any suggestions as what to check next?