ferris 25 hp kawasaki problem.
i need help, i am stumped. ferris 25 hp kawasaki engine, runs great but at full throttle when i go forward or reverse the engine runs rough and spits, let off the hydraulics it runs fine, just under load. Havent cleaned the carb yet, blew out fuel filter with compressed air, tank is breathing properly. fuel lines are good. Any help , i would apreciate it.
plugs are both burning grey in color
just recently replaced hydraulic lines??