C182 pilot reported a sticking throttle led to a runway excursion.

Attributes
ACN	1634827
Time
Date	201904
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Skylane 182/RG Turbo Skylane/RG
Operating Under FAR Part	Part 91
Flight Phase	Takeoff
Flight Plan	None
Component
Aircraft Component	Throttle/Power Lever
Person 1
Function	Single Pilot Pilot Flying
Qualification	Flight Crew Instrument Flight Crew Flight Instructor Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 5 Flight Crew Total 13368 Flight Crew Type 566
Events
Anomaly	Aircraft Equipment Problem Critical Ground Event / Encounter Loss Of Aircraft Control Ground Excursion Runway

Narrative:

The mission was to test the airplane after annual inspection. After an extensive preflight of about 45 min; everything looked good. Got into cockpit started engine; talked to ground control and taxied to run-up area. Did a through run-up using checklist and all appeared well. Taxied to runway hold line and called tower. I put myself on very high alert.I was cleared for takeoff and nudged the throttle to taxi onto the runway. The throttle did not respond. (I did check there were no brakes on.) pushed in the throttle again and woooo. That got action; too much in fact. When I went to retard the throttle it would not budge. It appeared to me that there was too much power to make decent turn onto the runway (about 90 deg.) so I let it go onto the grass while wrestling with the throttle. A high power turn is not safe in a three wheeler. I did manage to retard the throttle; told the tower I had a stuck throttle and I taxied back to the runway. When I got lined I exercised the throttle more and there was no problem. When testing an airplane the tester does need to be on a higher alert than normal for things to go sideways.

Original NASA ASRS Text

Title: C182 pilot reported a sticking throttle led to a runway excursion.

Narrative: The mission was to test the airplane after annual inspection. After an extensive preflight of about 45 min; everything looked good. Got into cockpit started engine; talked to Ground Control and taxied to run-up area. Did a through run-up using checklist and all appeared well. Taxied to runway hold line and called Tower. I put myself on very high alert.I was cleared for takeoff and nudged the throttle to taxi onto the runway. The throttle did not respond. (I did check there were no brakes on.) Pushed in the throttle again and WOOOO. That got action; too much in fact. When I went to retard the throttle it would not budge. It appeared to me that there was too much power to make decent turn onto the runway (about 90 deg.) so I let it go onto the grass while wrestling with the throttle. A high power turn is not safe in a three wheeler. I did manage to retard the throttle; told the Tower I had a stuck throttle and I taxied back to the runway. When I got lined I exercised the throttle more and there was no problem. When testing an airplane the tester does need to be on a higher alert than normal for things to go sideways.

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.