Since this section of the forum is dead, I'll post the results of an oil analysis that I had done on my 250SS and see what your thoughts are. As some of you may know, this boat boat use to belong to an elite pro and I'm the 3rd owner of this boat and the engine only had roughly 90 hours on it. One of my biggest issues I had with this boat was the poor hole shot and it cranked hard and would reset my graphs and live well control panel, even though the graphs were tied to a 6 gauge wire harness from the factory and powered by an Ionic 125ah lithium cranking battery. Obviously the elite pro had the same issue since he put wired manual rocker switches for the live well pumps under the dash to bypass the factory switches.
This spring, I changed my oil and used a combination of 6 qts Royal Purple Marine 10w-40 and 2.5 wts of RP 10W-40 HPS & used a Suzuki oil filter. **Note, RP Marine is not made anymore and RP recommends their HPS series for marine applications**. Additionally, I changed out my low pressure fuel filter on the engine and the fuel water separator in my bilge. The low pressure fuel filter seemed okay, but the fuel water separator was full of fine aluminum shavings that I assume were due to not properly cleaning out the aluminum fuel tanks from the factory.
After my maintenance is all complete, I took it out and the hole shot was dramatically improved and the graphs/live well pumps no longer resetting whenever I cranked up the big motor. I put only 45 hours on it this season, but did notice at around the 30 hour mark, my oil was pretty dark and I assumed it was due to the RP having an aggressive detergent package. Before I put it up for the winter, I changed the oil to Amsoil 10W-40 Marine and had an oil analysis done on the RP and the oil had 5% fuel dilution. I do idle my boat a lot when graphing or before tournament launches so it's fully warmed up. However, I do open it up and will run it hard for at least 15 minutes each time I take the boat out. Not sure if the excessive idle time would cause this, possible clogged fuel injectors, or the piston rings not broken in enough. I'll probably change the oil again around 45 hours next year, run some fuel injector cleaner through it, and reduce my morning idle time. Just sharing and seeing what your thoughts are.
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