On my first flight 10-21-22 (912ULS carb. floats weigh fine) I smelled fuel slightly, not enough to be alarmed. I am burning 91 octane unleaded no ethanol mogas. I had my air vent open. On second flight last Friday I was testing roll issues and flew at 5150 RPM for several minutes. The fuel smell got really bad, so bad that I abandoned any more testing and returned to the airport. I did not have my air vent open due to cooler temps.
By the time I got to the ground the smell had almost dissipated. While taxiing to the hangar it was gone. I sat outside the hangar and ran the engine at about 4000 RPM for a minute, no smell. On shut down and opening the oil check door there was no smell coming from the engine and none in the cabin.
Any ideas? I have checked fuel lines and find no sign of leaks.
By the time I got to the ground the smell had almost dissipated. While taxiing to the hangar it was gone. I sat outside the hangar and ran the engine at about 4000 RPM for a minute, no smell. On shut down and opening the oil check door there was no smell coming from the engine and none in the cabin.
Any ideas? I have checked fuel lines and find no sign of leaks.