Brand new 3902HST with fuel leaking out of fuel sending unit on top of tank. Brand new 3902 delivered last week. Put about 5 hours on it mowing then top it off with fuel before I put it away. 8 total hours. Now I’m getting fuel leaking out or under of the sending unit gasket. Yes when I say topped it off I mean about inch or two below the bottom of the filler neck. Is this common or uncommon? I will be talking to the dealer Monday.