Hi all, it's been some time since I've posted on here, but could use some help diagnosing a new problem. '99 330hp Black Scorpion with 620 hrs. meticulously cared for and maintained. Has always run perfectly since new. This weekend, after starting up and idling a bit, went to pull up a rider and it stuttered and kind of "skips a beat" like it's running on 6 or 7 cylinders. At higher rpm, it is a bit smoother, but still a noticeable misfire and roughness. Pulled some plugs and they looked fine, I had replaced them at 500 hrs. Feels like it might be an injector(s)? Put some injector cleaner in gas and changed fuel filter, but no help. Any ideas? I keep the boat at the river 4 hrs from home so I'd like to try and fix it there and not have to tow it back to a mechanic. Thanks in advance for any advice!
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