Hope someone can help.I have a 359+21 and every third or fourth tank of fuel the glo plug goes bad.It will run fine the until you shut it off and then when you go to restart it doesn't.Tried sealing the motor with silicone,not letting it run out of gas and shutting it off by the flywheel nothing seems to work.Somebody told me to replace the con rod but there is no play what so ever.Motor was running fine then out of the blue it started doing this.I also have a JPTL3.12 that does the same thing.