GX25
Engine Lacks Power:
Possible cause: Bad fuel; engine stored without treating or draining gasoline, or refueled with bad gasoline.

Drain fuel tank and carburetor. Refuel with fresh gasoline.
Correction
Possible cause: Bad fuel; engine stored without treating or draining gasoline, or refueled with bad gasoline.
Drain fuel tank and carburetor. Refuel with fresh gasoline.