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First year for Catalyst on Mercruiser Big Block?

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First year for Catalyst on Mercruiser Big Block?

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Old 06-26-2021 | 01:09 PM
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Default First year for Catalyst on Mercruiser Big Block?

Trying to figure out what model year the catalysts were added to the big block non-racing engines and the Google search is inconclusive at around 2010. Anybody know for certain when they were introduced?
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Old 06-26-2021 | 03:02 PM
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I was thinking 2010’ish as well.
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Old 06-26-2021 | 05:20 PM
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It's surprisingly hard to get anything definitive from the Web...
But it was an interesting research project...I always wondered how the catalysts were done, pretty damned ingenious!
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