I have an older Red Max EBZ 8001. It has developed a random issue where it will be running fine and all of a sudden, it will cut off just like I hit the kill switch. It does this more often at lower throttle speeds but sometimes, it will do it at full throttle. No clue as to what is happening. When it does this, I can just pull the rope starter and it fires right back up no problem. Then five minutes or five days later, it will die again. Very frustrating. Any ideas?