it starts right up and goes fine. i run wide open for 10-15 min. then fish all day. i start back up fine run wide open back to ramp, turn off, back the trailer in and try to start it back and it wont hit a lick at all. when i get home 30min. later it will fire right up perfectly. i have had it checked by mechanic he said the temp is perfect and he ran it for 30 or 40 min. in a tub and could not get it to repeat problem. i think it has been this way for a long time but where i normally fish i only idle.