718D Help Engine Swap

[Mereslm]

I have a 1989 718D with the Kubota D600 engine that finally hit its end. Everything else on the mower is fine. I have a buddy with a D902 that came out of a Toro Z-Master. I was wondering if anyone knew if these would switch out ok or if the configuration is just too far off. Thank you in advance

 

[spray]

This may be too late to help you but go to www.kubotapartsdealer.com/how-to-find-engine-model/ The engine codes are broken down including oem specs, etc. Grasshopper has its own code: MRG Don't know if its different than the engine you have available.