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  1. #1
    RC Qualifier
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    Aug 2012
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    New 3.3 break in done BUT.....

    So I got it broke in BUT. About mid wat through the third tank I noticed the temp starting to climb. Still had plenty of blue smoke so I checked the LSN. The LSN had leaned it self out nearly 3/4 of a turn I reset it to 1 3/4 and continued on my merry way. I finished out the break in procedure and ran another tank through it of light bashing. Before putting it away I checked the LSN again. It has again leaned it self out another 1/4 turn! How do I stop this
    Desmosedici RR

  2. #2
    RC Champion
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    Mar 2010
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    Hackettstown,NJ
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    Never had that problem with the 3.3 before but anything is possible.. there should be some rubber O rings that keep the needle seated and apply tension to the needle to prevent it from moving. check and make sure the O rings are not broken and seated correctly... I had an old HPI carb that used to change settings when running due to vibration and I used a little silicone sealant on the end just to keep it in place.. worked pretty good until I fixed it.
    Maxx3.3/ rusty5700/ slash3800/ slash5700 /4tec3.3

  3. #3
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    Ok checked it. Every thing seems to be in place. Any other ideas?
    Desmosedici RR

  4. #4
    RC Turnbuckle Jr. Snook Man's Avatar
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    New carb or old?
    No slipper/tall gearing/power = broken parts.

  5. #5
    RC Enthusiast
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    Aug 2012
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    Are you using the stock fuel tank? If so when the fuel gets to about half way down then it starts to do a mid tank lean.

  6. #6
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    It a brand new carb. Fresh 3.3 w/carb straight out of the box.
    Desmosedici RR

  7. #7
    RC Turnbuckle Jr. Snook Man's Avatar
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    Jan 2008
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    Like already stated, the O-rings keep the lsn snug in the slide valve. I would mark the lsn position with a bright sharpie and run it a bit checking periodically to see if it is indeed moving. If it is you should call traxxas support and let them know what’s going on.
    There’s no reason a new carb should act that way.

    I’ve seen it happen many times but not with a new engine/carb, only when it has had a lot of run time and the lsn has been adjusted a lot.
    No slipper/tall gearing/power = broken parts.

  8. #8
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    Oh I'm sure it's moving. After finding the HSN at 4 3/4 out of the box I checked the LSN and it was correct. Ill call Traxxas and see what they have to say. Thanks snook.
    Desmosedici RR

  9. #9
    RC Qualifier
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    Sep 2012
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    Jacksonville, Fl
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    let us know what they say red...
    EMBE
    Jato 3.3
    T-Maxx 2.5

  10. #10
    RC Qualifier
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    Oct 2012
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    Puttin out a fire
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    I was just braking in my motor tonight also. Only got thru (2) tanks with no troubble but ill check this too. Mine was a brand new 3.3 also.
    E-REVO MMM - Stampede 4x4 6s/3s

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