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Thread: 70 hp yamaha carb questions

  1. #1
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    Default 70 hp yamaha carb questions

    Can anyone tell me where they are setting the float levels on round bowl 70 hp carbs? I think my float levels are too high, and when I hit any chop my motor falls off like it is flooding out... I can pinch my fuel line and the motor cleans back out again. I see there are 2 vents in the upper bowl area of the carb and I think when fuel sloshes it's getting in them causing a rich condition???

    Anyone ever experience this? Thoughts?

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    Why not drop the float height a 1/16 inch or so?

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

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    level on the floats, fuel slosh usually goes lean.

    Part one of "Secrets of the OMC Mod 50" : http://www.boatracingfacts.com/forums/showthread.php?t=2052

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    I have lowered the float level but haven't been able to try it yet.

    That is odd it seems to go fat unless my jetting is rich which I don't believe it is. Running stock jetting 140/145/140. Turning my 10.5 x18 cleaver 6200 and my motor is still 2" below pad.

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    i would check the fuel pump, see if she is leakin fuel out of vac port.

    Part one of "Secrets of the OMC Mod 50" : http://www.boatracingfacts.com/forums/showthread.php?t=2052

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    Ok will check that also. Put a brand new pump on a month ago but will have a look.

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