hello i just took my gst to the park today cause it was a nice day out after sitting for 6 or more months. it started up after a few turns of the roto starter but after 10-15 mins it just died out and stalled on me. i brought it back to where my stuff is and tried to start it again but nothing was happening. i changed glow plugs and drained the fuel from the egine and reprimed it. still nothing was ahppening. what can that be from?

anyone?

After 6 months ... Check fuel lines as to condition or gummed up ( filter and carb also ) .. Fuel, spark = should go

i will add new lines today,and clean my air filter. what can i use to clean the inside of the engine? maybe like you said the after run oil or old fuel was gummed up inside the engine. how hot does the glow starter have to be maybe thats why it wasn't starting. whats a good way to clean the fuel lines and inside of the engine? can i spray anything inside the engine?

If it's really gummed up inside, the only correct way is a teardown. I would start with new fuel lines, clean fuel filter if you have one, drain old fuel and put in good fresh, good plug, make sure the glow starter is HOT and give it a try. Should go.