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Thread: Tuning Question

  1. #1
    Hockey369's Avatar
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    Tuning Question

    I was researching but I want to make sure I have this right so I do not mess up my boat.

    I finally got my ski up and running pretty good. I put just about 2 tanks through for break in so far. I know I was running fat to start because I did not want to lean out my engine during break-in. I am running oil at 32:1 also. Right near the end of the last tank I decided to start to adjust the carbs a little to see if i can get it perfect. The mid-range is awesome right now but if I let my ski idle for 30 or more seconds, its starts to die and will die if i dont give it more gas. When i give it about a half throttle at this point, its slow to get going and seems to me like its bogging down. Once i get up to about 4k rpm it takes off and will be fine at the lower rpms until i stop and let it idle again. What does this sounds like to you?


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    DAGO RACING CREW 97GPSLEEPER's Avatar
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    It's lean on the low speed circuit.

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    Hockey369's Avatar
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    Thanks....i'll richen the low speed up a bit

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    DAGO RACING CREW 97GPSLEEPER's Avatar
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    What are your RPM's at idle? Do you have an aftermarket tach?

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    Hockey369's Avatar
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    I dont have an after market tach yet....i need to find money somewhere for a new one and havent found a used one yet. Its set as close to 1300 on the stock tach as i could get. This only happens when its warmed up good like after 20 minutes or so, when I idle it will start to die unless i give it gas. It will slowly die though, like drop 100 rpms every few seconds until it gets to below 1000 rpms then it just dies. When its cold at first start up, it will idle for a few minutes without any issues

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    DAGO RACING CREW 97GPSLEEPER's Avatar
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    I'm sure the low speed needs to be richened. Another thing to note is that when you increase your idle speed using the T-handle, it effects your low speed right off of idle. When you increase your idle speed you are actually leaning it slightly and I have had to richen the low speed adjustment. Your allowing more air into the throat of the carbs when you increase your idle speed.

  7. #7
    Hockey369's Avatar
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    That is good to note as I did mess with my idle a bit last time out. I turned the idle up a 1/4 turn and turned the carbs leaner a half turn because i thought my jetting was real fat when i was breakin it in. Looks like i just made it too lean. Thanks for your help!!

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