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We were cruising along at around 3500 RPM, when suddenly power on Port engine reduced to 2,800 RPM, throttling up resulted in vibration and smell of gas. Throttling down and then back up to 3,500/ 4,000 RPM was fine but after 10-15 min. the same scenario, back to 2,800. Any ideas? Thanks...

I have had a problem with an engine alarm (Knock sensor code 44) for the past 4 years on my STBD engine; Mercury certified mechanics have: 1. told me I have no problem 2. told me "it's dirty fuel add stabilizer" which I do (this diagnosis cost me $1,000) 3. told me the knock sensor was not not...

I have a 1999 380 DA, love the boat, perfect size, but I have a problem which I can't seem to resolve. One of my engines frequently gives an alarm/ siren (I turn it off by shutting the engine off and restarting), twice mexhanics with Scan tool have identified the code as "dirty fuel"; the latest...