Is it known how many 912is engines have been produced?

Or what the current ratio is of fuel injected to carb 912 sales?


  • Re: Number of 912is or ratio to uls

    by » 5 months ago

    Hi Greg,

    Well the IS engine is a new boy on the block, the older carbed ones have been sold for decades. The IS is more expensive.

    I do not know but I suspect there would be at least 30 carbed ones out there for each IS.

    Why the question I cannot see the relevance ?


  • Re: Number of 912is or ratio to uls

    by » 5 months ago

    I would have guessed more like 100:1 in the field.
    I would be more interested in the current New-Engine Sales ratio.

    I can envision that at some point Rotax will discontinue New-Sales of the carburetted engines and only offer the fuel-injected models much like the auto industry did 40 years ago.

    I can already hear all the moaning as we had 40 years ago.

    The last remaining 2-Stroke model only exists to fill the Ultralight market niche where weight takes precedence over both reliability and fuel economy.

    Relevance?  Inquiring minds want to know!

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

  • Re: Number of 912is or ratio to uls

    by » 5 months ago

    Guys we are down to one remaining 2 stroke.....they were fantastic, relatively cheap and did the trick.  the four strokes killed them with better fuel efficiency and longer life.  Carbs are getting very old, very few companies use them or will sell them anymore.  The legacy engines will be sold as long as a supply is available and customers will pay for them.  the last few years we have seen a whole lot of bulletins on carbs and issues to work out with them regarding floats for example.  As suppliers drop off the list we may seen them forcing the issue in the future.  

    Yes, the injection cost more.  You get some bonus points however for the improved electrical power in that you do not have the need to put on an expensive extra alternator.  Fuel savings, better range of flight, is a big deal and over the life of the engine saves a lot.  The touchy bits of the early injected gearbox seems to be worked out with an improved oil spray internally reducing long term maintenance costs.  Most OEM building factory SLSA aircraft are putting the injected engines in.  

    In the next few years new models are planned, they will all be with fuel injection that much is clear.  


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