OK Uncovered boat after sitting all year and went over her - Ran good in driveway, (Ran Good last year , Went to boat ramp , slight miss at Idle , we motored out of the marina just fine , Went to open her up and this is when it started acting up, It was missing (Breaking Down) and a Matalic knocking noise started comming from what sounded like the rear of the engine, souned like it was low in the rear.when I backed off the throttle the noise slowley went away, the engine was Idling very rough and then cut off, I restarted the engine and, (the same thing) Let it set for about 5 min, started it back up and Idled back to the ramp with no Knock. The engine will Idle fine but misses and Knocks when under a load. My oil pressure has been around 80 PSI on the fly and around 60 PSI at Idle,This seems a bit high to me, If I had an oil blockage would this cause oil PSI reading to rise? YOUR THOUGHTS PLEASE 
<br /><br /> No water in oil, No Smoke, Plugs look fine, use mid grade gas, Did not change oil but looked very clean-changed it last year-only took her out 4 times. Dose anyone know what this could be? THANKS -
<br /><br /> No water in oil, No Smoke, Plugs look fine, use mid grade gas, Did not change oil but looked very clean-changed it last year-only took her out 4 times. Dose anyone know what this could be? THANKS -