What's on your bench?

[av8or3]

What I see is the insulator let go and slid up against the outer electrode. The inner electrode may still be inside that insulator.
If it did break as I’ve described, the plug would short internally.

 

[huskihl]

My first Denso plug failure.

View attachment 321944 View attachment 321945

Guess I got lucky. I can’t locate that missing piece anywhere and I don’t see any marks on the piston.
I stocked up on these. Hopefully this is just a fluke.

Did I put that in there?

 

[Wolverine]

Did I put that in there?

No. This was in the Jonny I ported.
I don't recall it cutting out last time using it but I took it to the woods a while back and it wouldn't fire. So I decided to have a look today and started w/ the plug.

What I see is the insulator let go and slid up against the outer electrode. The inner electrode may still be inside that insulator.
If it did break as I’ve described, the plug would short internally.

Interesting. How would I confirm? Bend the electrode and see if the insulator slides off?

 

[Lnk]

No. This was in the Jonny I ported.
I don't recall it cutting out last time using it but I took it to the woods a while back and it wouldn't fire. So I decided to have a look today and started w/ the plug.


Interesting. How would I confirm? Bend the electrode and see if the insulator slides off?

Take a measurement before you do from the base of the threads to the bottom of the hook. That way when the ceramic slides out, you can measure and subtract from the other measurement. If close to .025" you didn't lose anything.

 

[Wolverine]

What I see is the insulator let go and slid up against the outer electrode. The inner electrode may still be inside that insulator.
If it did break as I’ve described, the plug would short internally.

Winner winner chicken dinner.

 

[RI Chevy]

We got lucky on this one. Piston was still minty. Just a thick layer of carbon on top. I actually had to scrape the carbon of and buff it up before I could get a squish measurement.

It'll be tuned by me so it will be dripping url and spooge out the deflector. Lol

 

[huskihl]

No. This was in the Jonny I ported.
I don't recall it cutting out last time using it but I took it to the woods a while back and it wouldn't fire. So I decided to have a look today and started w/ the plug

Ok. Was just wondering about the timeline. I change plugs for customers if their plug looks old and didn’t know if I did yours or not. Looks like it has some runtime on it

 

[Kiwioilboiler]

My first Denso plug failure.

View attachment 321944 View attachment 321945

Guess I got lucky. I can’t locate that missing piece anywhere and I don’t see any marks on the piston.
I stocked up on these. Hopefully this is just a fluke.

@cuinrearview

 

[Wolverine]

@cuinrearview

I've been using the Denso's for a bunch of years now. Hope this is just a one time fail. Saw is a Jonsered 2150 (with original cylinder) that I ground on with the help of T4. Nothing special, compression isn't ignorant and I don't run it a lot. Tune was a bit fat cause I was letting dad run it.

 

[av8or3]

Winner winner chicken dinner.

That is exactly the failure I would anticipate when a spark plug gets dropped

 

[Dieselshawn]

My work bench at the moment. 2005 Cummins ISX 15 overhaul.

 

[MustangMike]

My bad, for some reason I thought it was a 460!!!

My apologies guys!

 

[Mkinslow]

New design of sorts, test knife mostly so it isn’t perfect. Bushcraft intentions with this one. Sent it of for professional heat treatment,came out at 60-61 Rockwell hardness. We’ll see how she holds up.
maybe soon to be that shinny 757, old girl cleaned up fairly nice all in all

 

[PA Dan]

New design of sorts, test knife mostly so it isn’t perfect. Bushcraft intentions with this one. Sent it of for professional heat treatment,came out at 60-61 Rockwell hardness. We’ll see how she holds up.
maybe soon to be that shinny 757, old girl cleaned up fairly nice all in allView attachment 322053

Looks very cool![emoji41]

 

[Mkinslow]

Looks very cool![emoji41]

Thank you!


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[RI Chevy]

Nice. What steel?

 

[Dieselshawn]

Nice. What steel?

Likely Vibranium

 

[Mkinslow]

Nice. What steel?

80crv2


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[Mkinslow]

Likely Vibranium

80crv2


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[JohnnyBlade]

New design of sorts, test knife mostly so it isn’t perfect. Bushcraft intentions with this one. Sent it of for professional heat treatment,came out at 60-61 Rockwell hardness. We’ll see how she holds up.
maybe soon to be that shinny 757, old girl cleaned up fairly nice all in allView attachment 322053

Beautiful as always Marshall! Question for ya. What does 60-61 Rockwell...? Hum....ok if u had a scale or list what would be on either side of 60-61? I think that makes sense. Also if that makes it super hard does it make it more brittle in one direction or another?
What wood is used on those handles?