Hello. Need input on Fuel issue.

Hello to all I was glad to run across this forum. I am hoping to get some good input and questions answered as well. I have a 2013 TRX420TE that up until now has been problem free. This past weekend I was riding for the first tim this year and at about 14 miles of trail riding the motor died just like it ran out of gas. The Petcock valve was in the fuel on position. After turning the switch off and back a few times it fired back up and ran fine for a few minutes then did it again. To make a long story short I noticed the fuel pump was not cycling most of the times I turned the switch on. I removed fuel pump canister assembly. Ordered a now unit from local dealership. Installed with new rubber seal and locking connector on pressurized hose. Was going to drain the fuel tank via the hose coming off the petcock valve and only get a slight dribble. Surely i have a clogged or gummed up tank / line / valve or all the above? How much fuel flow should I have at the hose from the tank that fills the fuel bowl at the fuel pump? Thanks in advance for helpful info and sorry this is so long but wanted to give as much info as possible on what happened.