From: "Finn Lassen finn.lassen@verizon.net" <flyrotary@lancaironline.net>
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Subject: Re: [FlyRotary] Re: AR2592 gap
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
References: <list-2062325@logan.com>
Message-ID: <5ea44fd8-07ba-91c5-3a4a-91eb51c9161b@verizon.net>
Date: Thu, 25 May 2023 16:20:43 -0400
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Thanks Ed.
But I've not been running AvGas at all. Only 87 10% ethanol pump gas.
I  bought the AR2592 plugs as recommended replacements.

Now having watched some youtube videos I may try cleaning the stock 
plugs in my ultrasound cleaner.

Found one site that claims the RX-8 gap is 1.2mm. So now I don't know 
why the AR2592 plugs with their 0.6mm gap are recommended.

Finn

On 5/25/2023 3:25 PM, eanderson@carolina.rr.com wrote:
> Finn,
>
> That sounds a lot like the onset of rpm drop caused by lead fouled 
> plugs.  I used to get around 100 hrs and then would start getting 
> Sparkplug SAG  (engine rpm dropping off).  It seem to get worst during 
> high power (such as take off) engine regimes.
>
> Regapping did not help and I never found a way of removing the lead 
> suspected of providing a grounding path inside the plug.
>
>   I would recommend a new set of plugs.
>
> Ed
>
>
> ------ Original Message ------
> From "Finn Lassen finn.lassen@verizon.net 
> <mailto:finn.lassen@verizon.net>" <flyrotary@lancaironline.net 
> <mailto:flyrotary@lancaironline.net>>
> To "Rotary motors in aircraft" <flyrotary@lancaironline.net 
> <mailto:flyrotary@lancaironline.net>>
> Date 5/25/2023 9:13:07 AM
> Subject [FlyRotary] AR2592 gap
>
>> For those of you who use the AR2592 spark plug in the Renesis, do you 
>> use the 0.6mm gap the plug comes with? I bought 8 of them some years ago.
>> I've been using the stock plugs (RE7A and RE9B) for maybe 100 hours 
>> by now. Experienced a brief 200 RPM drop on last takeoff Wondering if 
>> it's time to change plugs. Or re-gap the stock plugs to what?
>> What can I learn by looking at plugs?
>> Best way to clean them?
>> Finn


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    <div class="moz-cite-prefix">Thanks Ed.<br>
      But I've not been running AvGas at all. Only 87 10% ethanol pump
      gas.<br>
      I  bought the AR2592 plugs as recommended replacements.<br>
      <br>
      Now having watched some youtube videos I may try cleaning the
      stock plugs in my ultrasound cleaner.<br>
      <br>
      Found one site that claims the RX-8 gap is 1.2mm. So now I don't
      know why the AR2592 plugs with their 0.6mm gap are recommended.<br>
      <br>
      Finn<br>
      <br>
      On 5/25/2023 3:25 PM, <a class="moz-txt-link-abbreviated" href="mailto:eanderson@carolina.rr.com">eanderson@carolina.rr.com</a> wrote:<br>
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      <div>Finn,</div>
      <div><br>
      </div>
      <div>That sounds a lot like the onset of rpm drop caused by lead
        fouled plugs.  I used to get around 100 hrs and then would start
        getting Sparkplug SAG  (engine rpm dropping off).  It seem to
        get worst during high power (such as take off) engine regimes.  </div>
      <div><br>
      </div>
      <div>Regapping did not help and I never found a way of removing
        the lead suspected of providing a grounding path inside the
        plug.</div>
      <div><br>
      </div>
      <div>  I would recommend a new set of plugs.</div>
      <div><br>
      </div>
      <div>Ed</div>
      <div style="clear:both"><br>
      </div>
      <div><br>
      </div>
      <div>
        <div>------ Original Message ------</div>
        <div>From "Finn Lassen <a href="mailto:finn.lassen@verizon.net"
            moz-do-not-send="true">finn.lassen@verizon.net</a>" &lt;<a
            href="mailto:flyrotary@lancaironline.net"
            moz-do-not-send="true">flyrotary@lancaironline.net</a>&gt;</div>
        <div>To "Rotary motors in aircraft" &lt;<a
            href="mailto:flyrotary@lancaironline.net"
            moz-do-not-send="true">flyrotary@lancaironline.net</a>&gt;</div>
        <div>Date 5/25/2023 9:13:07 AM</div>
        <div>Subject [FlyRotary] AR2592 gap</div>
      </div>
      <div><br>
      </div>
      <div id="xb20b27f7809f427" class="plain">
        <blockquote cite="list-2061183@logan.com" type="cite"
          class="cite2">
          <div class="plain_line">For those of you who use the AR2592
            spark plug in the Renesis, do you use the 0.6mm gap the plug
            comes with? I bought 8 of them some years ago.</div>
          <div class="plain_line"> </div>
          <div class="plain_line">I've been using the stock plugs (RE7A
            and RE9B) for maybe 100 hours by now. Experienced a brief
            200 RPM drop on last takeoff Wondering if it's time to
            change plugs. Or re-gap the stock plugs to what?</div>
          <div class="plain_line"> </div>
          <div class="plain_line">What can I learn by looking at plugs?</div>
          <div class="plain_line"> </div>
          <div class="plain_line">Best way to clean them?</div>
          <div class="plain_line"> </div>
          <div class="plain_line">Finn</div>
          <div class="plain_line"> </div>
          <div class="plain_line"> </div>
          <div class="plain_line"> </div>
        </blockquote>
      </div>
    </blockquote>
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