Reply To: Struggling under load

[Don]

What pitch prop are you using? I too, would suspect improper syncronization of that “economizer linkage”. Does it run rough at WOT, does it skip or surge? Or, does it just feel like advancing the throttle really doesn’t do anything? Any chance the mag plate is binding and not advancing fully, perhaps it is getting jammed on that shift lever interlock arm. Perhaps some debris is caught in the high speed fixed jet.