I screwed old plugs in, to protect the threads & keep the trash out, and ground off the eyebrows using an angle grinder.

Anyone ever seen the 'why' of the eyebrows being cast on the housings? I was a little uncomfortable removing them without knowing their original purpose.

Charlie

On 11/19/2021 12:05 PM, Steven W. Boese SBoese@uwyo.edu wrote:

Steve,

I chose to counterbore the spark plug holes to accept an unmodified socket.  A tool was made by installing a cutting bit into an old lug nut machined to fit the original hole as a guide.

Steve Boese

RV6A, 1986 13B NA, RD1C, EC2

---

From: Rotary motors in aircraft <flyrotary@lancaironline.net> on behalf of Stephen Izett stephen.izett@gmail.com <flyrotary@lancaironline.net>
Sent: Thursday, November 18, 2021 7:39 PM
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: [FlyRotary] Spark Plug Socket

 

◆ This message was sent from a non-UWYO address. Please exercise caution when clicking links or opening attachments from external sources.


Hi Guys

I’m using the NGK Iridium BR10EIX and had ground down a socket, but it broke.
Have others:
1. Ground of the eyebrows?
2. Found a socket that’s perhaps forged instead of cast?

Whats the wisdom?

Thanks people.

Steve Izett
--
Homepage:  http://www.flyrotary.com/
Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List.html

--
Homepage:  http://www.flyrotary.com/
Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List.html

Virus-free. www.avast.com