FD590V - 18 hp engine stalls abruptly 5-10 seconds after start. New carb, new plugs (wet), removed and cleaned gas tank, fresh fuel, new fuel lines, fuel pump good, compression good, crankcase vacuum good, choke plate good, as gas tank cap vent good, clean air filter. Will test cylinder...

have a 345 FD590V. runs to speed and temp. after mowing short time (seems when it warms up) engine bogs/sputters/quits. no smoke. will restart and runs w/out deck running. deck free and clear. just adjusted valves. coils seem to have right resistance. filter good. it has 1k hours. compression...