I have a Craftsman Model # 580.752060 gas pressure washer that the motor bogs down when I squeeze the trigger while using the high pressure tips. Can anyone please help ?

Hi,
I would guess internal pump scoring. Has the machine been left running for more than a minute or two without having the pump engaged. Heat would build up and vaporize the water, which happens to cool and lube the pump. Yes, it has oil lubing it also, but the water does too.
Peace,
Clarke