gas in the cranckcase

[scars]

Hi I have a 15 HP 2007 fourstroke merc outboard that is getting fuel in the crankcase when I run for 30 minutes or so. It runs great when cold then as it gets hot it cuts out. I believe it is a crab problem and possibley a float valve problem but not sure. any sugestions?
Thanks, scars

 

[guyjg]

Just a thought...Not sure about the fuel pump operation on a 4 stroke but could it be leaking into the block?