fbpx
Login

 

Jump to Forum..

Start up problems

in 912 / 914 Technical Questions 8 years ago

  • Re: Start up problems

    by » 8 years ago

    Electronics tend to either be bad or good and not usually on a calendar time schedule. This leads me to believe this is fuel related especially since it starts well each day if started the day before. How many hours on the engine? How many hours since the carbs have either been inspected or rebuilt? Any other running anomalies?

    Roger Lee
    LSRM-A & Rotax Instructor & Rotax IRC
    Tucson, AZ Ryan Airfield (KRYN)
    520-349-7056 Cell

      
    Report

  • Re: Start up problems

    by » 8 years ago

    Engine houre 760 since new and the problem started aboat 7 months back never before we had any problems. The carbs was inspected,cleaned aboat 15 hours ago. No other problems.
      
    Report

  • Re: Start up problems

    by » 8 years ago

    Hi Mark

    Thanx for the reply, I will try to get hold of ignition coils and hopefully it is the problem. We also got some advice from an AMO that if the engine turns over a fraction too slow that the ignition coils will not generate enough power to ignite the coils. We, however, made sure that the battery is up to 13.6 V before we crank the engine but still no luck. I still have to establish at what rpm the engine have to turn over to create enough power to ignite the coils the eliminate the starter motor as the problem.

    Regards
    Mossie


    The next time it takes an extended cranking session to get it started; Once it starts, shut it down immediately.
    The battery is now about as weak as it is ever going to get, and the engine has not had a chance to warm up.
    Wait a few minutes for what little heat there is in the engine to dissipate, then try starting it again.
    If it starts up promptly you can pretty well eliminate the battery, starter, and ignition coils.

    Your symptoms sound consistent with Low/No fuel in the Carb Bowls.
    It takes an extended cranking session to refill the carbs. Once refilled, all becomes normal.
    If you don't have a carb leak, consider that the fuel is just evaporating during the week in storage.

    How hot is the weather?

    Bill Hertzel
    Rotax 912is
    North Ridgeville, OH, USA
    Clicking the "Thank You" is Always Appreciated by Everyone.

      
    Report

  • Re: Start up problems

    by » 8 years ago

    I have the same problem. > 20 seconds to start the first time of the day. Starts instantly the rest of the day. 2010 912 ULS 900 hours. Replaced the electronic modules, 6 months ago. Start problem started about 4 months ago Choke linkage seems OK. Replaced the carb floats. I tried using the aux fuel pump - doesn't help. If it is low fuel in the carbs, how do I fix it.
    Thanks
    Tony
      
    Report

  • Re: Start up problems

    by » 8 years ago

    Good day

    I have a 912 ULS on a low wing plane and when it stays stopped for a long period the first thing I do is to activate the electric fuel pump for about 10 seconds to pressurize the line and them initiate the start up normal procedure. don´t know if it works in a 914 but for the 912 is perfect the engine starts on the firt revolution.
      
    Report
You do not have permissions to reply to this topic.
Related Topics
Title Category Replies
Tecnam 912 service Bulletin to disable soft start 912 / 914 Technical Questions 1
Engine start issues 912 / 914 Technical Questions 13
After starting 912iS Technical Questions 6
Lane A and B check after start 912iS Technical Questions 8
Fuel System Pressure Testing before engine start General Tech Discussion 1
Follow Us

Recent Videos

Safety First!

 

To receive critical-to-safety information on your ROTAX Engine, please subscribe to
ROTAX-OWNER.COM

Prize Giveaway!


SUBSCRIBE NOW
to automatically enter this years draw!

Login