Chainsaw spark plug thread weld repair

I've been welding plug threads up on rare or expensive chainsaw cylinders for a long time. I've tried to capture and share some of the tricks I've learned over the years. There is a lot more to it than just welding since you have to handwork the chamber back. I'll try to answer questions via the comments.

[@dustinhumphrey560]

Fantastic job! Can’t wait to get it back and see it in person! Pretty excited about this build. The one I just finished is going in service this week, then I’ll have a good idea of what needs tweaking for this one.

[@iraagans3144]

Quality work, always a good idea for fixing these.
Nicely done.

[@Witschor]

Impressive work, awesome Skills!
Thanks for sharing even your Tig Settings and Materials! Very good Job!

[@zeromark202]

Amazing work!!

[@srcarr52]

Thanks!

[@jamesconnors9388]

That was very well done. Nice work

[@justinweaver8787]

Great work on this sir.

[@dynojoemods2764]

Very nice!

[@cajun3197]

Man that’s slick. Thanks for all you share with us

[@karmanrepairs7579]

Nicely done!

[@trucken72]

Try 2% ceriated tungsten for aluminum, you’ll be able to hold a sharp point 1-1.5 times diameter in length. Also it won’t spit like other types and has good arc starts.

[@srcarr52]

Thanks, I'll try some. I've had pretty good luck with 2% lanthanated. I'm running pretty close to 200amp with 3/32 tungsten which is pushing the upper limit of it. I guess I was using 1/16 in the video which is way too small for the amperage.

[@trucken72]

Lanthansted is junk, try ceriated and you’ll see why I say this.

[@srcarr52]

@@trucken72 I ordered some today. Thanks.

[@fabzacres-blackcat]

Lotta work 😀

[@daniellaney3946]

You’re pulling your tungsten away too soon. Leave your tungsten at your weld and let your post flow gas run until your tungsten cools down. This keeps your tungsten in the shielding gas to cool down and keeps it from contaminating. I believe that would fix your tungsten problem

[@WilliamVanSloun]

I have one with the same issue. Do you do this for hire?

[@srcarr52]

Yes I do, you can contact me at [e-mail] or through the website LuckyDogMFG.com

[@jasonjackson4424]

How can i reach out to the guy? Got a 391 i need welded up

[@srcarr52]

You can contact me through luckydogmfg.com/pages/contact