Narrative:

[While] preparing for arrival; I made a precautionary forced landing approximately eight miles west of ZZZ due to engine sputter and lack of power.prior to landing; I transmitted 7700 and broadcast my intentions of a forced landing on CTAF. No injuries; damage to aircraft; or property were encountered during landing so I reset my transmitter to 1200 and made a call on CTAF that I was safely on the ground.suspecting fuel contamination; I purged both tanks of the remaining 10 gallons on board into a 5-gallon bucket and found a small amount of unknown debris. I subsequently refilled the tanks and confirmed full power to the engine before continuing on.

Google
 

Original NASA ASRS Text

Title: C182 pilot reported making a forced landing short of the destination airport due to loss of engine power.

Narrative: [While] preparing for arrival; I made a precautionary forced landing approximately eight miles west of ZZZ due to engine sputter and lack of power.Prior to landing; I transmitted 7700 and broadcast my intentions of a forced landing on CTAF. No injuries; damage to aircraft; or property were encountered during landing so I reset my transmitter to 1200 and made a call on CTAF that I was safely on the ground.Suspecting fuel contamination; I purged both tanks of the remaining 10 gallons on board into a 5-gallon bucket and found a small amount of unknown debris. I subsequently refilled the tanks and confirmed full power to the engine before continuing on.

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.