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  1. Hey everyone, Im still very new to the hobby of boating and this is my first time posting, and tried to do as much research on the forum here and elsewhere before going forward. So far I have bits and pieces to put together but want to make sure I'm seeing the whole picture before moving forward. Long story short I took the boat out two days ago and it was idling pretty high which caused it to start deiseling and then it hydrolocked. I got home and the cylinders in my left bank were full of water. Based on initial research I took the spark plugs off, and cranked the motor to expel as much water as I could. Then plan was then to leave it uncovered with the doghouse open to let as much moisture evaporate while I figure out my next steps. I know I for sure need new spark plugs, but beyond that Im not sure what my next steps should be. Do I have to change the oil even though water only made it into the cylinders? From my understanding the piston rings should theoretically keep water from seeping into the oil. If I do have to change the oil, what oil and filter should I be looking for? Ive a lot of debate on this so I guess just tell me if I'm ok to use Royal Purple 15W-40, or Mobil 1 15w-50. Do the cylinders need to be 100% dry before putting in new spark plugs and attempting to run it? When I crank it I still get some puffs of moisture coming out. Once the process is done, how do I go about fixing the high idle so this doesn't happen again? Long story short I ended up replacing the spring piston thing in the carb that controls acceleration? For some reason when I bring the throttle to neutral the piston doesnt fully decompress so it leaves it revving too high. Old piston didn't have that problem. If I missed a thread where I can find these answers please point the way, and many thanks in advance for any tips or advice!
  2. Boat is a '05 VLX with a 340 Monsoon with 1,300 hours (last 300 hrs in salt water). I think I need new exhaust manifolds based on taking off the manifolds and seeing salt water leaking out of one of the cylinders and corrosion on the exhaust valve (see links below for pics). I was considering buying cast iron manifolds , was wondering if anyone had experience with or knew if aluminum or cast iron worked better with salt water. Corroded Valve: https://photos.app.goo.gl/wMRVeiW2itTveReR6 Opposite side of the Block: https://photos.app.goo.gl/bV7rs3tXX4bWT9WN9
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