DuroMax XP18HPE 440cc Recoil/Electric Start Gas https://amzn.to/44oN2jU About this item 440cc D 4-stroke overhead valve design engine that has E-Z pull recoil start Shaft is 1 in. In dia and 2-3/4 in. Long, while the end is 3/8 in. Size 24 unf - Drilled and tapped 1.7 gal. Fuel tank which at half load can run over 3 hours on a single tank of fuel Email me at mainemudmower@yahoo.com | RedneckComputerGeek