I have a 99 centurion direct drive 315 hp merc. After spending hours on the lake. If I let it sit on the shore for a hour it will start and back fire die ect. even if I raise the engine cover while its sitting it won't run. If I start it and feather the throttle about five times it will run without any problems So is this a vapor lock or another problem ? of course it's a 105 degrees out. and the fuel pump is running. Thank You Joe
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