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Suzuki df30a wont idle or run above 3k RPM

1368 Views 18 Replies 11 Participants Last post by  Rene L. Vila III
My 2016 Suzuki df30a wont idle and wont run above 3k rpm at around 2500-3k the boat sounds perfectly smooth (7 mph speed). I drained the fuel water separator and it was full of a clear white sand like sediment, I replaced the separator filter and inline fuel filter. I also notice the motor gets extremely hot but pees a solid fast stream of water.

I also pulled the spark plugs and noticed a lot of black carbon build up and they were just changed in January. My fuel consumption was also really bad when I traveled home 8 miles at 2500 rpms.

I tried emptying the tank and putting fresh new gas with some seafoam with no luck.

Should I try cleaning the fuel injector next or what do you guys recommend?
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Discussion Starter · #4 · (Edited)
I also had a 2-4 CMP sensor code and it was not the sensor that failed. My suzuki Mechanic said the problem ended up being something with the bolt on the cam shaft being loose which im sure is from my stainless prop and all the chatter it makes at low RPMS. Just a heads up to anyone with prop chatter on a stainless prop. It will end up loosening internal parts! This was after 6 years of use but still not worth the extra 1mph.
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