Pilot reported a runway excursion due to faulty rudder controls.

Attributes
ACN	1745646
Time
Date	202006
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	PA-20 Pacer/PA-22 Tri-Pacer
Operating Under FAR Part	Part 91
Flight Phase	Landing
Route In Use	Direct
Flight Plan	None
Component
Aircraft Component	Rudder Control System
Person 1
Function	Instructor
Qualification	Flight Crew Commercial Flight Crew Instrument Flight Crew Flight Instructor
Experience	Flight Crew Last 90 Days 98 Flight Crew Total 765 Flight Crew Type 407
Events
Anomaly	Aircraft Equipment Problem Critical Ground Event / Encounter Object Ground Excursion Runway

Narrative:

Landed on runway. Unable to get enough rudder control response to keep aircraft rolling on runway. Aircraft departed runway. Aircraft came to stop after striking a log off runway.I was suspicious of the rudder effectiveness. I should have postponed the flight until further evaluation could be made by an aircraft mechanic.

Original NASA ASRS Text

Title: Pilot reported a runway excursion due to faulty rudder controls.

Narrative: Landed on runway. Unable to get enough rudder control response to keep aircraft rolling on runway. Aircraft departed runway. Aircraft came to stop after striking a log off runway.I was suspicious of the rudder effectiveness. I should have postponed the flight until further evaluation could be made by an aircraft mechanic.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.