Landlord 18 Hydro seamless re-power?

[FTG-B10 0]

Hi guys, I am wondering if anyone knows if there is any engines that you can put in a Landlord 18 Hydro, I don't know what year it is, though it is newer (plastic body), it has a Briggs 18hp Vanguard, so is there any other engine that you can just plop in and it should be good to go? Thanks, Dustin

[Al 6]

Hi, Thee Vangard 20 or 23 should tune it up Al Eden