surging

I had a surging problem with my 318 after it would run for maybe a half hour the surging would start and would not stop until after I shut it down and let it cool off. I think the problem has been solved with a 20 dollar 12 volt fuel pump I installed on it . I think its a 2 to 4 psi pump. I have...

Hi all, I am at the end of my rope with a new-to-me 214. It is a newer model with the electric clutch. It wants to surge and hunt no matter if it is idling or running WOT. I have cleaned the carburetor numerous times, replaced the entire length of fuel line, cleaned the tank and shutoff valve...