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    Boat sways side to side when going fast?

    17ft narrow powerboat, with Johnson 175hp on back, with a 19 inch prop. Just got boat ,when you get to top end speed boat starts to sway from side to side, tried trimming out Any ideas?????
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    Johnson 1978 175 v6 carb question

    removed all jets from carbs x 3 idle orifice nos 33,33,31,30,30,32,31. is this right that they are not the same omc book ref 32 slow jet all? my main jets are 34 x 3 correct by manual reason for carb overhaul poor slow running just removed plugs 1 and 3 oily==33 in 1=33 in 3= rest ok ( what...
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    1978 johnson 175 hp jet question?v6

    Just got this engine, doesnt want to idle so giving it a carb rebuild and clean, removed idle jets they are, 33,33,31,30,32,31 main jet 34X3 is this right, as I would have thought the idle jets would be all the same? thanks for any help.
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