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Thread: Best Ignition switch?

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  1. #1
    Senior Member
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    Default Re: Best Ignition switch?

    When I installed the Jabiru engine in my Avid MK IV, I just used the switch that was already in the plane. Probably the one that Aircraft Spruce sells. If I didn't have that switch, I would just use a keyed switch to start the engine and 2 toggle switches for the mags like Larry did. I tried several times, and was never able to start my Jabiru engine by hand propping. It has to turn over at about 300RPM to make spark, and that takes a pretty hefty flip on the prop. At least I couldn't do it. JImChuk

  2. #2
    Senior Member TJay's Avatar
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    Default Re: Best Ignition switch?

    Bringing this back up, So a while back I contacted Jabiru and they said the best switch to use is the ACS switch, http://www.aircraftspruce.com/catalo...lickkey=226119 Which is great for me in two ways because I already have this switch, and I cannot for the life of me find an exact match to my tyco breaker style toggle switches for shutting off the mags, but since I bought it many years ago I have lost the diode that goes on the starter relay, Do any of you know what diode I need to buy, I may end up at radio shack today,

  3. #3
    Senior Member Dave S's Avatar
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    Default Re: Best Ignition switch?

    TJ,

    Might check this item on ACS to see if it matches your switch number.

    http://www.aircraftspruce.com/catalo...lenoidassy.php

    Looks like this diode assembly for the switch/solenoid is intended for a couple applications
    Dave S
    Kitfox 7 Trigear (Flying since 2009)
    912ULS Warp Drive

    St Paul, MN

  4. #4
    Senior Member PapuaPilot's Avatar
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    Default Re: Best Ignition switch?

    This diode will work on any application that is uses a solenoid. When hooked up correctly the diode dissipates the collapsing field of the solenoid so it doesn't create a spark across the starter switch when you release it. Without the diode your starter switch can slowly burn up across the internal contacts and eventually fail.

    This is called a clipping diode. I made my own using an IN4004 diode, heat shrink and crimped on the solderless terminals.
    Phil Nelson
    A&P-IA, Maintenance Instructor
    KF 5 Outback, Cont. IO-240
    Flying since 2016

  5. #5
    Senior Member TJay's Avatar
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    Default Re: Best Ignition switch?

    hey thanks guys

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