hi all. i have a 2001 model 25n and its hard to start from cold(about 8 pulls of the cord)but once hot starts first go. the motor runs rough at idle and blows a bit of smoke when you rev it after is idled for about 2 mins. changed the plugs,checked the timing and turned the carbs as per manual.the motor has about 35hours on it and its been like it from the start. is this normal or is there a problem i can not find.<br />cheers tim 