The boat was not used for last two years, I winterized it both years, I found that on the last outing with the boat engine was running very rough, I know when I first got the boat it did not run that bad. I took a closer look ate the engine and found that the bolts that hold the two halves of the block together were all loose meaning they were snugged down. Ok so I went in with a torque wrench and tighten the bolts the best I could also the power head bolts were loose to the lower unit. I started the engine up and it seems to run ok on muffs. Someone was in this engine at some point so I am not sure on the future of the engine, Oh also the bottom carb had two gaskets were it mounts to the block!