Recently bought a 2004 Husqvarna LTH1842 Riding Mower.. It had been used for one season & stored since. I mowed a half an acre, ran great. This morning I ran it for 10 minutes & it puttered out. I replaced all fuel lines, filter, spark plug, gas was new). Restarted briefly & again, puttered out. I checked for fuel flow from the fuel pump, there was none so I replaced that as well. Still didn't start. Tried starter fluid, engine kicked but still will not start. What next? Could the 'O' ring on the oil cap be a factor dimenishing air to the pump?

I replaced the fuel pump when replacing all fuel line parts. This type of pump is disc driven run by air flow, common to many Riding Mowers in the JD, Huski families. They are self contained & not rebuildable in any event. Priming to the carb didn't help either so I will next try starting fluid to begin the prime cycle but doubtful. Thanks, though. I replaced the fuel pump when replacing all fuel line parts. This type of pump is disc driven run by air flow, common to many Riding Mowers in the JD, Huski families. They are self contained & not rebuildable in any event. Priming to the carb didn't help either so I will next try starting fluid to begin the prime cycle but doubtful. Thanks, though.

Thanks for replying; I would be careful using starting fluid. it can blow up the motor.
I have heard that this can happen.
Check for a weak spark in ignition system. Repace if nesscesary (crank sensor)
And when you have flywheel off replace ( key ). The key may be bent on shaft this could be why hard to start. Good luck. Thanks for replying; I would be careful using starting fluid. it can blow up the motor. I have heard that this can happen. Check for a weak spark in ignition system. Repace if nesscesary (crank sensor) And when you have flywheel off replace ( key ). The key may be bent on shaft this could be why hard to start. Good luck.