[GregH]

Ok, it seems to be my turn for this kind of problem, and I hope it is something simple that I just dont know enough about.

The engine this spring has been toyed with a little in terms of idle mixture and power tuning at idle.

Started the engine today (starts as expected with choke and throttle ) and after a min closed the choke and let it warm up around 1200-1500 rpm. After around 10 min it started losing power and then died.

Restarted with choke on and it would take enough throttle for it to run around 2500 rpm, eventually climbing to 3000 if I did nothing. With the choke on, if I reduce throttle it dies.

About 10% of the time, I can get the choke off and the engine running around 2000 rpm for a min or two, then it will lose some power, come back, but eventually dies within that time frame.

The carb choke opens and closes fully - VISUALLY checked

The idle mix is at 1.25 turns

Fuel pressure is constant at about 2.5 psi

During the brief times it runs, the vacuum is at 15

I did not have a fuel safe container to check fuel from carb, etc. With me.

Time to remove carb and clean?

Could it be water causing this? Time to hook up another fuel source and see if any different ?

I'VE BEEN trying to search all the tidbits of info on here but would appreciate any input.