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The suppliers for Rotax 912 stuff sell both types:

I just happen to be looking at the Lockwood catalog but CPS supplies these also:

http://www.lockwood.aero/p-2586-carb-synchronization-kit-for-rotax-912914.aspx
is the gauge type.

http://www.lockwood.aero/p-3301-carb-mate-diagnostic-tool.aspx
is the electronic type.

They are about the same price. Just under $90.

But, Apparently you also need this adaptor kit
Rotax accessory kit- includes adaptor, nylon case and holster TLTS-400KIT
to use the electronic version at an additional approximately $90 (which seems very high for what is basically some tubing adaptors if and a carrying case),
making the electronic sync kit _twice_ as costly.

So my questions are:

Can anyone tell me the pros and cons of the electronic sync device vs the traditional gauge type?

Can anyone tell me if the "Accessory kit" is really necessary? Is it just a matter of taking a bit longer to get properly hooked up to the carbs and only an issue in a shop where the A&P does many syncs a year, but not for an owner who might do this once a year or less?

Finally, how much skill and time does it take to do the sync decently?
Last sync I had an experienced Rotax guy do while I was there (at the throttle control), and it took less than 10 minutes and seemed to basically only require that he adjust one idle setting on one carb, just keep tweaking it until (he was using the eletronic sync kit) the readout showed both sides balanced. This was despite his saying (correctly I'm sure) that when he started they were WAY out of sync.
Is that typical, or can it get a lot more complicated and time consuming than that?
If so, when would THAT happen?

In short, I'm trying to decide if it's worth getting our own sync kit and doing occassional sync checks rather than, as we did this year flying 4 hours round trip and paying $85 each year to have an experienced Rotax guy do it.

All replies appreciated.

Alex
  • Re: Electronic carb sync device vs. vacume guage type

    by » 12 years ago


    Here is an article you can read that may help you decide. Bottom line is you can do much more with gauges over the electronic sync tools. You can do a lot of diagnosing and tell which carb you want to adjust or which is clogged up or if a cable needs adjustment, ect... With gauges which you can't very well with the electronic tools.


    http://ctflier.com/index.php?/blog/3/entry-24-the-anatomy-of-a-carb-sync/

    This article used to be here in the blog section, but it's gone.

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


    Thank you said by: Al C

  • Re: Electronic carb sync device vs. vacume guage type

    by » 12 years ago


    Hi Al

    If you go to the video section there are five videos on carburettor syncing for the 912.

    The other link that Roger gave you is one persons take on how to balance the carbs, which I disagree with and I would recommend you do it as Rotax suggest.

    I do agree with Roger about using the vacuum gauges as opposed to the electronic version, my view is that you can see what you are doing and you can get them more accurate.

    Balancing the carbs, when you understand what it is you are doing, takes literally a minute once you have the engine warmed up and the gauges connected.

    Cheers Mark

    Thank you said by: Al C

  • Re: Electronic carb sync device vs. vacume guage type

    by » 12 years ago


    ;)

    Thanks Mark,

    ``....Balancing the carbs, when you understand what it is you are doing, takes literally a minute ...``

    Hey, I really think I understand very well what I`m trying to _do_ -- to accomplish -- in synching the carbs (what the goal is, and what happens when they`re not synched right.
    That doesn`t mean I know _HOW_ to do it, let alone without screwing something up. ;-)

    Al

  • Re: Electronic carb sync device vs. vacume guage type

    by » 12 years ago


    Hi Al,

    Give me a call and I'll be happy to walk you through it and tell you what to look for. It should be bad at all.

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


    Thank you said by: Al C

  • Re: Electronic carb sync device vs. vacume guage type

    by » 12 years ago


    ;)
    Thanks !

    We just had ten synced by a very riotax experienced A&P... It's running great and probably won't need sync again for a while. But will take you up on that offer when next needed.

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