My JD LA130 ran well but then it sat idle for almost a year because I was using my other mowers. ( I had a mowing biz for two years before cheaper services put me out of business) I needed to areate my lawn this past spring and decided it was a good time to do a PM on the JD even though it has only 46 hours on the engine. I replaced the battery, changed the oil, oil filter, fuel filter, spark plugs, and did a general clean up of the mower. When I started it up I noticed that it was not running smoothly at all. It would run only if the choke lever was pushed forward equal to the throttle lever. I then noticed some moisture in the carbarator and stopped the engine and checked my fuel lines, and gas tank. Somehow water had migrated into the fuel tank so I drained the tank, disconnected and cleared the fuel lines, blew out the fuel pump and cleaned out the carbarator. After that I put everything back together, put fresh fuel in the tank, and started it back up. It ran but ran like it was starved for fuel. I checked the fuel pump and it working fine or seems to be but again after starting it up and running the engine for awhile I noted that both levers had to be set equally to keep it running. I never adjusted the throttle or the choke setting screws. I didn't want to mess with those. But the engine will not run as smoothly as it did prior to my PM. What must I do at this point?