New to the forum. I have a Mustang 32 foot boat with twin Volvo Penta V6 4.3 ltr engines. I had recently had the boat at the marina for the yearly anti foul. after relaunching I decided to test the new props and took both engines up to 3000 rpm It all went well for about 1 minute when the Starboard engine started to miss and splutter, I pulled the throttles back down slowly. and the Starboard engine stopped. I tried to start it with no success. it sounded like the starter wasn't working just a click, tried a few more times with same result. Arrived back at my private jetty when my friend told me the bilge pump was spewing water out of the bilge.Tuned the Port engine off to discover the bilge half full of water and the Starboard engine was flooded with salt water. I emptied the bilge and decided to investigate the Starboard engine, it wouldn't turn over. it hydrollicked I then pulled the spark plugs out and water pressure in number 1 cylinder blew the plug out of my fingers. I then pulled all the other plugs with no water at all, then turned the engine over until no water came out of the no 1 cylinder. I then squirted water displacement oil into all cylinders , removed the exhaust and riser from that bank and checked the gaskets ,no problems, all good no water leakage there. I put number 1 spark plug back in to see if the engine would turn over, and it did with no lockup at all and no water in number 1.
Can anyone give me any idea as to what the problem could be. I don't like to put all the plugs back in in case it bends a rod or something worse.
Sorry for the long post, just wanted to give you all the full picture.
Can anyone give me any idea as to what the problem could be. I don't like to put all the plugs back in in case it bends a rod or something worse.
Sorry for the long post, just wanted to give you all the full picture.