Googled this and my first suspicion came to the top. Oil sensor is stuck. This is on a Timberwolfe wood splitter. I disconnected the wire to the oil switch sensor, and still no spark. Does this bypass the oil switch? I am guessing not, as it still won't spark, assuming it is the oil switch. Any suggestions appreciated. I did a search here at and got nothing. If the splitter is in the sun, above 60 degrees or so, it will start within five pulls usually. How can I bypass the oil switch, or am Is my diagnosis incorrect? Warm, it runs like a top. And yes I have confirmed there is no spark when it will not start. No spark at all.