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  1. Canadianbuds

    Volvo penta aq120 only hitting 3000rpm

    New to the forum, hey all!! So I just picked up what I believe to be a 1967ish hydrodyne.. it has the aq 120/200 with twin zenith stromberg 175 CD carbs.. boat starts, runs and shifts perfectly.. But I'm only getting 3000-3100 rpm on what looks to be the original penta tach, and reaching a top...
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