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Hello my name is ***** ***** am I speaking with? I read what you wrote. Yes there is a possible doomsday condition. I would not personally buy this boat unless the issue is corrected. It could be a sensor issue, it could be a fuel pressure issue, it could be a short in the harness keeping the injectors open for to long. Or worst case scenario is the crankshaft is not installed correctly. Multi cylinder 2 stroke engines have seals on the crankshaft that separate each cylinder from the one next to it. If something was up with any of these internal seals, any number of running conditions including this one. Either way, if it is a vacuum leak or a crankshaft seal issue, in either event you would be looking at more or less total engine disassembly, which is going to cost thousands to fix. I would not purchase this boat unless the issue was fixed first, there are so many other good boats out there that don't have any problems.
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Was there anything else?
Hi Steve. Well. There are 4 basic places a vacuum leak is going to come from.
1. It could come from the intake manifold to engine block gasket.
2. It could come from the upper crank seal.
The motor would not need to come out or be disassembled for these 2 areas.
3. The crankcase, the engine block itself, is 2 halves. And there is a seam on both sides of the engine block. If this seam is the source of the leak the engine block will need to come out and be disassembled to fix this.
4. There is a lower crank seal as well. If this is the cause of the leak it's the same thing. Engine removal and disassembly.
Was there anything else Steve?
HI Steve, just checking in. No rating has been put through for my service yet, did you have any further questions on the issue?