I have a 89 blaster and i was wondering if anyone knew why the spark plug keeps fouling out with oil. I went through and cleaned the carb and every other aspect and after trying to start it a few times I took the carb off again and it had some oil in it, along with the spark plug. I do not mix my fuel it is oil injected. I've been trying to troubleshoot this for a few months now. Any help is appreciated. Thanks.