johnserend ht 18 ?

i bourt a johnserend ht 18 at a back yard sale i bourt it home and put a spark plug in it would not start so i put a little bit of petrol on plug and it started i did this about 5 times but it onley went till it burnt up the fuell on plug im not good mac can any one help would it be worth fixing or just bye a new one how much new ? thnxs for your help



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