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Thread: Mercury intake tunnels???

  1. #11
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    Here we go again; speculation: My best guess is that they are to improve idle by reducing standing wave action.

    With one carb per cylinder, there's a standing wave of fuel droplets in front of the carb at certain rpms--it's a length/ rpm tuning thing. (That's one of the functions of those "silencer" air boxes attached to the carbs; to contain this.) If you've seen that standing wave of fuel hanging in mid-air it's kinda scary; I mean, one good spark and....ka-boom!

    My late and much mussed buddy Clint watched a big block Chevy running on a dyno with Hilborn injectors. There was a MASSIVE cloud of fuel droplets 18 inches high above each of the 8 injector pipes at certain rpms!

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

  2. #12
    modifiedoutboard OUTBOARDER's Avatar
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    45ss does it getting on plane. will try balancing tubes soon.
    ANTHONY McCULLOCH
    modifiedoutboard@hotmail.com

    Some things never change!

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

  3. #13
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    Here's another factory intake set up, this one from a Merc 90 triple. Note how deep those inter-cylinder passages are!

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

  4. #14
    Team Member fs5's Avatar
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    I removed the attentuator from my merc triple and every time I pull the cowl to wash it when I get home there a lot of fuel sitting in the lower cowling.
    I was thinking about making up some venturi's for it ,do you reckon this would help?
    other wise I was going to refit the attenuator back on.

  5. #15
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    That's the standing wave of fuel droplets impacting on the cowl and settling.

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

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