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Thread: idling rpm's

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    MDGPR's Avatar
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    idling rpm's

    what should my idling rpm's be? please let me know. thanks.


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    Happily Self-Employed WFO's Avatar
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    I checked mine in the water last weekend and it was between 1100-1250.

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    MDGPR's Avatar
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    what about out of the water?

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    ABBOTT's Avatar
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    out of the water will be unpredictable due to the fact that the prop is spinning freely. It most likely will be higher out of the water than in because the prop has nothing to "move".

    Just be sure that it doesn't run away with you on the trailer (meaning the boat wants to rev higher and higher without you giving it throttle like it has a mind of it's own).

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    MDGPR's Avatar
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    ok, reason i want to know is because i ddint have the throttle adjusted right so it was at 3800, know thats to high but im guessing out of water should be ball park around 2300? im tring to adjust it before i hit the water.

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    ABBOTT's Avatar
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    its going to vary in a big way----5 seconds may be 2200 then it may jump to 3300, it's going to be all over the place (never at a constant rpm out of the water). Your tach will go haywire on ya. It's normal.

    if it bothers you that bad then just adjust your low speed circuits on the efi controller to about 1 (this will quit sending it all the fuel that the current setting is telling it to.)

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    2000 GPRXP 4tec shooter98xpl's Avatar
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    Abbot, not sure whats wrong with your idling, but mine is a consistant idle in the water and out of the water. If your motor keeps going higher and higher up in rpm, say from 2500 to 4000 then to 5500, you may have an air leak somewhere.
    Idle should be consistant between a few rpms, like 20 to 50, not hundreds.
    Also may want to check and make sure your throttle cable is not tight and holding your carbs open. I've done it before thinking it was my idle set to high. Turn your idle way out and see if it drops, if it does, then your okay on your throttle cable.
    SHOOTER

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    ABBOTT's Avatar
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    oh hell... i am retarded ------i forgot he was fuel injected. I am Converted to Black Jack Carbs.

    I can't even remember what my EFI setup sounded like at idle on the trailer. Sorry about that.

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    2000 GPRXP 4tec shooter98xpl's Avatar
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    I guess that makes me retarded also, hahahaha, I didn't know he was fuel injected. I thought he had carbs.
    I have carbs on my ski. It only fluctuates 20 to 30 rpms when idling. Thats why I was thinking you may some kind of issue going on if your idle is fluctuating 100 or more rpms. Your jetting can be off also if thats the case, at least thats what I was told.
    Hehehehe, see you in a month, then we can call each other retards.
    SHOOTER

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    mtrager's Avatar
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    Re: idling rpm's

    Quote Originally Posted by MDGPR
    what should my idling rpm's be? please let me know. thanks.
    Your rpms in water should be around 1450. Wfos is lower because he has a taller prop. Your low speed on your fuel controller determines rpm and speed of idle along with the amount of smoke you are putting out. The higher the number the lower the rpm.

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