i have a 23 hp kawi engine on my exmark ztr. i starts up fine first thing in the morning, but after that it takes awhile to start up after playing with the throttle and choke levers. i tried checking the spark plugs but i cant get a socket wrench in to take the plug out. pretty dumb question but how can the plug be removed with the roll over bar backet right next to the plug? it is a tight fit. how can i fix the starting problem?