Some engines take 1/2 to one gallon to be broken in such that the cord isn't that tight to pull. When shutting down, keep the piston at the bottom dead center.

I say it ain't broken in completely.

Loosen plug, backout plug 1/2 turn or more, warm with hair dryer, and complete the break-in properly by heat cycling. Get temps up to 200 plus then let 'er cool with piston at BDC.

By the time you are done this several times and have driven and tuned it to get max performance, 1/2 gallon should be gone.

Is this a Picco we are talking about????????????