Incident Overview
The pilot reported that after takeoff from a private strip, the airplane's engine experienced a partial loss of power at approximately 300 feet above ground level (AGL). A forced landing was performed to a road. During the landing sequence, the airplane's wing contacted 'tall weeds in [a] road ditch and pulled [the] airplane into [the] ditch.' The pilot shut down the engine after the airplane came to rest.
Engine Run and Observations
An engine run was performed, and an FAA inspector, who attended the run, reported that the pilot 'reached in and started the engine; it ran smoothly. He advanced the throttle slightly, the engine accelerated smoothly.'
Pilot's Suspicions
The pilot reported that on the day of the accident, there was high temperature and high humidity. He 'suspected carb[uretor] icing.' However, carburetor icing was not verified.