I have a 2004 Optimax that will start and run great. I have run it many powerup and power down cycles. Occasionally after shutting down for some reason if refuses to startup. I have replaced the gas line and bulb to make sure there was no air leak. There are no error codes. I have had the mechanics go through it and all pressures are good and no other problems found. They even put it on lake and tried to get it act up, but no luck. Frustrating. Has anybody else run into this problem?

