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tm lower unit
what years are gen 1 and what year are gen 2 on the tm lower unit, thanks
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Mercury 3L/4 Stroke/Verado Moderator
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Mercury does not use "years"- so that's probably not a viable method of answering your question. Additionally, the Gen-1 TM gearcase is still built today (just not available on any current production engine).
The Gen-2 first showed up near the end of 2011 on 225/250 ProXS engines (on specific ProXS model numbers).