[jc35]

Hey all. I have an older CForce 500 that will not start. I am about to pull out carb and clean it. I have done the following, let me know if there's something else I can try if this doesn't work. I'll let you know if the cleaning changes anything.
Charged battery, changed and tested spark plug, clean out and checked air filter and box, drained carb, drained gas tank tried new gas, changed out inline fuel filter, changed a few gas lines to clear vinyl so I can see that fuel is moving to the pump,  I'm wondering if the pump to carb or choke are not working, they look ok?
Let me know if there something else I can try.
JC

[Cosmosdan]

Fuel, spark, compression. Try holding your hand over the carb. while cranking it over. Should pull fuel up and wet your hand or even start. Next I will spay some gas in there and try to start it too. If it runs for a second, I move on to the carb. You can pull the fuel line off the carb and put your thumb on the end. Crank the engine and see if you get fuel pressure.

[viejoperro]

Try to put a little amount of fuel, directlly throw the spark plug hole, be carefull not to insert any dirt inside the cylinder. Then put the spark plug on again conect it and try to start, with spark and compresion it shoud fire up for a few seconds, even backfire, telling you the engine is ok the ignition and comresion. Your problem should be fuel supply.

[murdo]

Have you checked the valve clearances?