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Thread: Mercury intake tunnels???

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    Default Mercury intake tunnels???

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Size:  54.8 KB what are these tunnels for in the intake and what would happen if I plugged them?

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    modifiedoutboard OUTBOARDER's Avatar
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    help balance intake pulses at low rpms so it trolls around and gets on plane
    ANTHONY McCULLOCH
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    Quote Originally Posted by OUTBOARDER View Post
    help balance intake pulses at low rpms so it trolls around and gets on plane
    So this is why my motor bogs at low idle when in gear

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    modifiedoutboard OUTBOARDER's Avatar
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    no , needs to be tuned up
    ANTHONY McCULLOCH
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    Team Member fs5's Avatar
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    I always thought it was for priming fuel to start it

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    49ci OMC, Alum flat sabine river killer's Avatar
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    on some engines is a good mod to make these larger or to add them when their are none but you can ruin a good intake at the same time
    All boat racers lie, accept me and you, but I am starting to question you.

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    modifiedoutboard OUTBOARDER's Avatar
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    Quote Originally Posted by sabine river killer View Post
    on some engines is a good mod to make these larger or to add them when their are none but you can ruin a good intake at the same time
    In general larger the dia or area higher effective rpms. several
    snowmobile triples have them to help low rpms out.
    ANTHONY McCULLOCH
    modifiedoutboard@hotmail.com

    Some things never change!

    They Want it cheap..............

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    So do some twins. This is a Yamaha set up.

    Jeff
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    "We live at the bottom of an ocean of air." - General Marvage Slatington

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    Quote Originally Posted by Fastjeff57 View Post
    So do some twins. This is a Yamaha set up.

    Jeff
    So they help with low end rpms and wide open rpms?

  10. #10
    49ci OMC, Alum flat sabine river killer's Avatar
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    you are actually pulling from all the carbs. on a 2 cyl 1 carb set up it helps to cut a window in the intake to do this. the big briggs twins like it
    All boat racers lie, accept me and you, but I am starting to question you.

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