Hello everyone. I have a propane powered hyster with a 3.0l gm engine in it. This unit has had the nosecone blow off the starter and wipe out the ring gear two or three times in the past 5 years. The first couple times it happened we were using aftermarket starters. We switched to OEM (nosecone looked thicker) and the problem didnt occur for a couple years untill now. We have 4 of these in our fleet all of which backfire occasionally when the operators are on and off the accelerator rapidly in a short period of time, but this is the only one that has had nose cone issues. Any help or suggestions would be greatly appreciated as I am tired of pulling this motor out and want to find the root cause of this problem. Thank You.