Doesn't matter, when your pulling the start cord in the full choke position you're "primming" the carburetor in that mode. Eliminate primer step #1 and start (pun) with #2. New out of the box saws, trimmers, etc., without a primer are "primed" this way. We were instructed not to have the customer present during the first start because it sometimes takes a lot of "priming" and it may look like the unit is hard to start because of the first prime. Full choke "prime" until you hear or feel the first "pop", (only one pop! and) then to the partial choke and it will fire up.....going out on a limb (pun again) from hundreds of times doing this.