Good Afternoon, This is my first time posting but i am looking for advice from people that may have had similar experiences. I have a 2001 270 Sundancer with a single 454 mercruiser and bravo III drive. The engine was having trouble getting up to speed and had a miss all summer. I had intercoastal work on the boat. They took it out and said they found the issue and it was a part in the distributor and fixed it. When i went to take the boat out to see if it was fixed, there was a new noise in my outdrive and would rattle loudly when i would turn to either side...that was not there before they took it out and burned a whole tank of gas and to top it off the boat still would not get on plane. I asked them again if they could see if they can find the issue. They take the boat out again, use almost a full tank of gas and then tell me they found the issue and it was a coil. They said the boat runs great but my engine sounds like it has a slight knock to it now. I go down and start my boat to take it out and see if its fixed and there is a LOUD knocking that was never there before. I have no idea if they actually fixed anything because i was never able to use the boat after they brought it back. I have another mechanic look at the engine and he says the engine is done and will either need to be replaced or rebuilt. Am i out of line in my thinking that Intercoastal should accept some of the responsibility for this? Both times they took the boat to fix it, it came back worse and then the 2nd time it was brought back the engine was blown. How should i approach this?