<1B714735> I bought a 2009 Nitro with 200hp Mercury Optimax about a month and a half ago. It only had 53.1 hours! When I test drive it, it would get up about 50mph and give a 4 beep alarm. It was a dealership selling it for an individual and the dealership told me that it was just an oil sensor needed replaced. I got the boat at at good deal so I bought it. After checking this out online, it appeared that it might actually be the oil reservoir on the motor needing replaced. I bought a new oil reservoir, replaced it and never have gotten the alarm again......FIXED! But the mechanic at the marine shop (that I bought oil reservoir from) told me to “Swift shift” a time or 2 when I replaced it to ensure there was no air in the line (purge the line). So I did this a couple times immediately and then pulled it to a water hose to run it and allow the oil reservoir on the motor to completely fill to top as the crankcase pressure was supposed to automatically do this. Well it didn’t appear to be filling so I turned it off and before cranking it again, I did the “Swift shift” again. It seemed to be idling fine on the hose although it didn’t seem to be filling the reservoir. I figured it might need to be ran so I brought it to the lake, ended up doing the “Swift shift” again before cranking it, and before idling all the way out of the no wake zone it died and would not crank again. It turned over fine but acted the same way as if the kill-switch would’ve been disconnected. But it was connected. I brought it to a different marine shop (b/c the previous one was a couple hours away). They found that a rubber bushing had come loose and was blocking the high pressure fuel pump. I picked it up and went to the lake on the way home where it cranked and idled fine, took off fine, but then went to missing and bogged down. I couldn’t get it back up on pad so I idled in. At this point I called the marine shop and complained and they told me that it was probably fouled plugs and they didn’t have a lake nearby to put it under a load to test.......so I replaced the plugs. Brought it back to the lake and it ran great for 3-4 minutes before it started missing and bogged down again. I cleaned the plugs and same thing. I did this 2 more times before dropping it off at another (more reputable) marine shop. I told them everything. They’ve checked compression and said everything is good. They cleaned plugs and same thing happened to them when they brought it to the lake. They’ve supposedly emailed Mercury who told them to run some “quick-clean” through it. They called me and said it was ready and running fine. I asked them if they ran it at the lake and they said no,...but they would if I wanted them to before coming to get it. So the dud and ame thing- ran good for a minute or so before missing and bogging down to the point that it comes off of plane. It’s going on 3 weeks and they keep telling me that they think it’s a fuel issue but haven’t gotten it figured out. Is it possible that I dumped too much oil on the cylinders when I did the “Swift shift” 4-5 times when I replaced the oil reservoir on motor? Could this be what’s causing plugs to foul out and run horrible? If so, is there anything to do to correct the issue? Motor serial number is 1B714735. Please help!