Cessna 206 pilot reported several occurrences of momentary engine power loss for unknown reasons.

Attributes
ACN	1311001
Time
Date	201511
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	Cessna Stationair/Turbo Stationair 6
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Route In Use	Direct
Flight Plan	None
Component
Aircraft Component	Engine
Person 1
Function	Single Pilot
Qualification	Flight Crew Commercial Flight Crew Flight Instructor Flight Crew Instrument
Experience	Flight Crew Last 90 Days 25 Flight Crew Total 3000 Flight Crew Type 1000
Events
Anomaly	Aircraft Equipment Problem Less Severe

Narrative:

VFR flight via GPS direct. After uneventful cruise at 5500 ft MSL; engine running rich-of-peak by 50 degrees and with no change in controls the engine momentarily seemed to 'quit'; not roughness or vibration but rather a momentary loss of power that lasted maybe 1 to 4 seconds. I increased mixture; switched tanks and turned on aux fuel pump. Engine ran for another 30 to 50 seconds then quit again for a few seconds. Process repeated approximately 5 or 6 times enroute to [destination airport]. ATC advised of the condition and I requested maintaining altitude and would continue to destination. Landing uneventful.had mechanics go over the engine and fuel system the following morning. No anomalies found to explain the event. No evidence of water or other fuel contamination. Jpi data evidently was corrupted and not usable (instrument to be sent to factory for repair). Eventually flew the return trip using a route over lower terrain in case of engine failure but flight was uneventful.

Original NASA ASRS Text

Title: Cessna 206 pilot reported several occurrences of momentary engine power loss for unknown reasons.

Narrative: VFR flight via GPS direct. After uneventful cruise at 5500 ft MSL; engine running rich-of-peak by 50 degrees and with no change in controls the engine momentarily seemed to 'quit'; not roughness or vibration but rather a momentary loss of power that lasted maybe 1 to 4 seconds. I increased mixture; switched tanks and turned on aux fuel pump. Engine ran for another 30 to 50 seconds then quit again for a few seconds. Process repeated approximately 5 or 6 times enroute to [destination airport]. ATC advised of the condition and I requested maintaining altitude and would continue to destination. Landing uneventful.Had mechanics go over the engine and fuel system the following morning. NO anomalies found to explain the event. NO evidence of water or other fuel contamination. JPI data evidently was corrupted and not usable (instrument to be sent to factory for repair). Eventually flew the return trip using a route over lower terrain in case of engine failure but flight was uneventful.

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.