Roy Page wrote:
We have the same problem with two Archers and a 180.
The problem existed before and after overhaul of both 0-360 engines [1 by
Lycoming & 1 by Signature]
Both rebuilds had overhauled carbs fitted.
The other Archer with 2100 SMOH has the same stumble at or near 1500 RPM.
A clever guy on the net will soon enlighten us as to the cause I am sure ??


Until I saw the other suggestions, which sound better, I was going to
suggest checking the primer lock. Whenever I saw something like this
on a Warrior with an O-320, this turned out to be the case.