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  1. #1

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    Anyone having starting issues with Rotax and Fuel controller

    All of a sudden I am having problems starting up the ski. Once it start it does 80+ all day.
    After I shut t down for a while, the I need to crank it many times before it starts.
    Do you think now in the heat the controller is dumping too much fuel at start up?
    I have Rotax with fuel controller and 50# injectors.
    thanks


  2. #2
    Fast & Loud meeper's Avatar
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    i know brendon has the same setup and you have to give slight gas on startup so it will start....

  3. #3
    EZ Dock of Long Island Shibby1485's Avatar
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    Quote Originally Posted by meeper View Post
    i know brendon has the same setup and you have to give slight gas on startup so it will start....
    that's most likely (pretty positively) due to his exhaust, and nothing else.

    I had alot of experience with this, it's his exhaust that requires that slight throttle at start-up

  4. #4
    Fast & Loud meeper's Avatar
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    he told me its because he has it tuned on the rich side and its dumping so much fuel on startup that you have the move the throttle a little to get the TPS in the correct spot....i am pretty sure..

  5. #5
    Been there and back! BDNJ's Avatar
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    Hey guys. My ski had/has oversized pistons in it; plus a cam. I'm sure it has affected my ratios. You need to buy the cable and disc from Brian; plug it into the ski and adjust the fuel levels from 0-2000 rpm. Brian's spec settings run at a fuel level of 8.5-9.0. I had to adjust mine to 5.5 to keep it running with no addt'l throttle. That is about a 40% decrease in fuel ONLY for the low rpms.

    If you're going to MB III, I will be happy to tweak your map on the spot!

    Brendan

  6. #6
    Fast & Loud meeper's Avatar
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    any new news on that thing b?

  7. #7
    Been there and back! BDNJ's Avatar
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    Hecyan - I run an a/f meter all the time and don't recommend making any changes without monitoring your a/f level. With my controller set @ 9 on the lows, my a/f was under 10. I always try to be above 11 @ idle.

    I think removing a little gas @ idle just to smooth things out wouldn't be too dangerous.
    Last edited by BDNJ; 05-30-2007 at 10:13 AM.

  8. #8
    Been there and back! BDNJ's Avatar
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    Quote Originally Posted by meeper View Post
    any new news on that thing b?


    6 hrs and still tuning. Looking good so far. Springs in?

  9. #9
    Fast & Loud meeper's Avatar
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    nice, how is it? speeds? rpms?

    the plan is start tonight, they showed up yesterday.

  10. #10
    Been there and back! BDNJ's Avatar
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    Quote Originally Posted by meeper View Post
    nice, how is it? speeds? rpms?

    the plan is start tonight, they showed up yesterday.

    Can't go that hard.....did 71.2 @ 7000 so far

    Good luck w/ springs...take your time.

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