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Hello, my name is***** will assist you.
Would you please post the serial number of the engine?
Does the connector to the engine leak fuel?
Has the engine been siting?
So really you are having a hard time starting when the engine is warm?
Ok, when you last changed the plugs, how did the tops look.
I tried to accept your request, but the system would not let it go through.
Sorry to hear about that.
Have you changed the fuel filter, and what brand is the primer bulb?
When you replaced the old fuel line, was the inside of it falling apart?
Have you opened and inspected the main fuel pump on the engine?
This is the diagram of the fuel pump. 2 of the bolts hold it to the block, the other two hold it together. Can you open it and isnpect the diaphragms and the check valves?
It is possibly the fuel pump leaking back or a sticking or hung check valve. We don't know until you eliminate it.
While you are there, do a compression test as well. Any less that 90 PSI, the engine will have all sorts of issues.
There is not much too complex on this engine. I can guide through anything on it.