I had an older, smaller CC given to me because the owner never could get it to run right.
After rebuilding the carb and replacing the air bleed screw I could not get it to run right either.
It will choke down when hitting difficult areas and will even stop if no choke is applied.
Not sure what the problem is but suspect it is because the fuel tank is not very high above the carb. Since this mower has gravity fuel feed I feel the motor is being fuel starved.
Probably needs some sort of fuel pump.
j.kuss
p.s. I gave the mower to a neighbor, and boy is he frustrated![/QUOTE
I had the same problem with my 18HP magnun Brought it to the shop They charged me about $600.00 Brought it home and in ten minutes cutting time it ran foul again and would not regain the motor rpms until I came to a full stop. I reloaded it back on the trailor and brought it back. About $150.00 later (you know the routine) I brought it home, it messed up 30 minutes later just the same as before.I drove the trailor empty back into town and came home with a new sears garden tractor 5000 series 25 HP 54 inch dech been great cutting my little over 2 acres Years later I found out the 18HP magnum was flooding out so bad it would make the motor loose all it strengh. Sometimes it would even dump gas into the oil. I mess empty the gas tank and fill up the oil way over full. With a fresh and clean carburetor it ran like a new motor and extremly strong.