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    2015+ 6.2L 300hp vs 350hp Upgrade

    Has anyone upgraded the PCM on the 300hp 6.2L (PN: 8M0124464) for the PCM on the 350hp 6.2L (PN: 8M0124465)? Everything I have researched, this is the only difference in the two versions of the newer generation 6.2L
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    Mercruiser 6.2 Fuel System Fault Code

    2018 Mercruiser 6.2L 300HP Was pulling my 2018 Monterey 335SY out for the season last weekend and had a couple codes show up on the Vessel View. Anyone know off hand what this 902-5 code means? I know the 946-6 code is the stupid O2 sensors. I have spares to change them out, although the...
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    Mercruiser 6.2L Coolant Loss

    2018 Mercruiser 6.2L engine. Coming back from our tie up the other day, my port engine lost all coolant. Checked the oil and it is good. I'm guessing it has to be a coolant hose somewhere, the splatter seems to be inline with the belt. My plan is to fill it back up with coolant, start it up, and...
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    Mercruiser 6.2L Catalyst Removal

    Has anyone removed the catalyst manifolds on the newer 6.2L Mercruiser 300/ 350HP engines (NOT the older GM block version)? Have close to 700 hours on my 2018 and thinking of replacing them with Stainless Marine/ Hardin Marine/ etc. Curious if anyone has had any success in doing this? I know...
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    Mercury 6.2L Loss of Planning Power/ Top End

    I have a 2018 Monterey 335SY with twin Mercruiser 6.2L engines (300hp version). These are the newer Mercury in house version, not the older GM block style. The boat has been very slow to plane out, to the point I have to move people to the bow to help it. Its been doing this for awhile and I...
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