I purchased this for around £400 on an offer , what a Bargin right ?!
No, it come with problems I strongly believe were caused by the delivery guy (1 person not 2 as advertised or needed )
It was dropped and rolled infront of me let alone what happens behind closed doors.
I assembled it and added oil and allowed to sit for a hour (as they do come with testing oil in as not all can be removed for transit )
On start-up it smoked as expected for 20 seconds then stopped , I allowed it to run for maybe a minute dry no hoses connected.
Stopped it and left it maybe 20 minutes before connecting it up to the buffer tank but leaving the HP hose and gun of.
Allowed to cycle for 5 mins , 20 mins cool down and repeated a few times for the heat cycle to kick in.
Once done I added the hose and lance and as soon as I depressed the trigger the bang from the pump was horrid.
I tried to back off the unloader valve making no difference.
Fitted a new pump and it has been a great machine since.
Vevor technical were a great help and sorted my issues promptly
I will use them again for items needed as it was a great service and all be it good prices for products.
4gpm pressure washer. 
