Thanks for the replies. I have been using 2 stroke Victas since my dad bought the first Mustang in 1974 & these run on any petrol. My 1986 Bronco needed new rings & rebore at a cost of ZAR1100 (a new Chinese 160cc 4 stroke mower costs ZAR2099). So I gave the Victa to the shop & bought a used Rolux Hornet with Sprint motor for ZAR300.