i have a df60 four stroke . it starts fine all morning. when it gets hot , around 95 degrees in middle of day, you go to start it , it will start for a second and die. you can not get it to start for at least 10 min. it does turn over but will not start. usally after 25 to 30 tries or more, it will start and run fine. may not occur again, the rest of the day. if i quit fishing before noon , i usually have not problems