Mercury 300 on a 23

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one other thing about the 350s. they dont warranty them the same as the rest of the mercs. they come from the racing side of things and mercury knows anybody crazy enough to run them likes to go really really fast...the warranties are much shorter, sorry i dont know specifics. as far as a 300 on a 23, i think youd be fine, but as a rule i defer to fr. frank (and others much wiser than myself).