it is a flathead,if that helps,please a price on stater,also was told unit cuts out after 5 or 6 min.s was told bad compresion,i don`t have acces to the welder yet,sounds more like electrical problem,modgule??,starter not capable of starting it to find out,would like to use for backup power at the house durring blackouts,i`m told it is the JG ,would kind of like to know the power out of gen. please email strter price and shipping cost to saltydeadfish@yahoo.com thank you ...sorry zip code 30127