engine runs good at low speeds, no power over 4,000 r p m unless i use the key enricher, i know it sounds like fuel starvation. the engine has been tuned, carburetors have been cleaned and rebuilt. linkage has been adjusted. any other ideas?
If the engine picks up past 4000 rpm by pushing in on the key primer, you either have some restriction issue in one or more of the carbs or you have a significant air leak.What engine are we troubleshooting here?