Chainsaw Repair

Wow RB says there is BIG gains to be had on this saws.  RB did  a Jonsered 2139 = 338

Is this the mod done on your 338 Willard?

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I run mine with a 9/16th ID tube. The best place to add it is about an inch below the existing tiny port, and angled downward at 30 degrees or so. A hole will need to be formed in the plastic cover. Make the tube the proper length so that it ends just short of the plane of the cover, to eliminate being burned. Retune carb, and be prepared to cut 25-40% faster than stock.

Yes same idea as Rogers 9/16" outlet. I'm gonna change it though, been burning holes in my work pant legs. I will enlarge the original outlet to 9/16"- 5/8" and silver solder a larger deflector on. Really brings these saws alive with this mod.
My 2009 5100131 338XPT has the same "new edition" sticker like yours.