Thankyou gmax , Im not to flash at that but I will try n do something, I found several photos of 075,s that look very much like mine but not any that show the auto chain oil adjusting leaver that on the exhaust side plus has the thumb oiler plunger on the front , the spare parts box I got with the sae has barrel and piston that measured 58 mil in dia so if thar helps and it has a tolminson carb on it ???, thanks again bloke yeah