OK so last saturday my friend who lives in a fairly large city called me and said there was a guy with a running john deer splitter for 200 bucks, he fired it up and ran the ram out and back in, i told him to grab it for me, and now i am the new proad owner of a new splitter, i put some fresh gas in it, some new oil and a new air filter, and it now starts on the 2-3rd pull everytime with now priming or anything, it is powered by a briggs 5 horse and the motor runs good most of the time, but when i set a log on the deck hard it will sputter for up to 15-20 sec. and slowly recover, anytime you rock it or hit it with something it will sputter like that. any thoughts as to the cause of this, it has all kinds of power and has split some big (40" +) black oak with no worries, but i would like to get the suptter out.