Small Engines (Lawn Mowers, etc.): onan generator, blown head gasket, bucket truck

Question
i have an Onan generator on my bucket truck.  it runs a hydraulic pump and also power ie. 110 220 outlets.
running fine this morning at a jobsite for 2 hrs.  then died and couldn't get it running again.  checked if it was getting fuel ... removed the line after the fuel pump and plenty of gas.  checked spark ... seems strong.  its doing my head in.  can u help?

Answer
Hello Ange:

Did you Try to Start the Engine by Pouring a Small Amount of Gas Into the Carburetor Throat? When the Engine Quit; Did it Sound like it was Starving for Gas or like you Shut it Off? There are Several Possible Causes for this. 1- a Valve Burnt. 2- Carburetor has Trash or Water in it. 3- a Blown Head Gasket. 4- Clogged Exhaust. Send me the Model Numbers Off the Engine, Please. With these I can Locate the Proper Manual and Better Assist you. Hope this Helps. I am here if you Require more Assistance. Let me know what Happens, Please. Thanks.

Good Luck

Respectfully

John