Hard start when warmed up

[billsrotty]

Sorry if this has been asked before. I have a 2007 Suzuki df140 fuel injected 4 stroke. Boat starts right up first run of the day but after running a while if I stop to drift and then try to start it up after 20 minutes or so it starts and stalls. Then I have to put it in neutral rev if up over 2500 then it'll stall at idle the first time do it again and it's ok. Then it runs fine. No problems at high or low speeds. I changed the fuel filter, separator, and plugs. Changed thermostat and put in new gas.
Any help is appreciated.

 

[99yam40]

not sure about the zuks, but some motors have a fuel cooler and if that does not cool things properly the gas in the VST can boil out shoving all of the vapors into the intake causing too rich envirment during restart