I know that this topic has been discussed several times, but anyway I would like to ask for some real life experiences. There should be folks who meanwhile have experience with both 2 and 4 stroke powerplants…
Due to microlight regulation I`m interested mainly in comparison of 65(582) vs. 80 hp (912). So no focus on 912uls, zipper, edge,… options
Is the swap worth the effort? Why/why not?
Aside from short following pro and con list, how did your Kitfox IV changed? What real life numbers did you gain?

con

  • cost (engine, mount, prop, accessories,…)
  • additional weight
  • no ideal installation with early mount (oiltank, carb position, …)
  • approval procedure needed
  • no quick and easy swap (cowling, cooling System, avionics,… are affected)
  • …

pro

  • improved reliability
  • simplified operation procedures
  • better resale value of the plane
  • increased performance (cruise/climb)
  • …

Thanks for any insights!