rotax 277 problem
My names Jack and I have an issue, I have a rotax 277 i purchased about 6 months ago and I could not be told the history of the motor when i did buy it, now the issue it it starts well runs well for about 5 minutes till the engine appears warmed up then just randomly dies, It then takes me ages to get it to run again it wont even attempt to start after 20 pulls then it splutters for another 20 pulls stopping after 2-5 seconds then if im lucky it will start and run, this usually all happens after ive let it cool down for 15 minutes and keep adding choke taking it off and so forth for about 10 seconds. Im not that machanically minded but im slowly learning would anyone know what i should look at first? please and thankyou so much im loosing sleep over this :(