I bought this pump because it was mentioned in the comments that it is a direct replacement for mtd part # 718-04127 which is the pump I needed to replace. And based on the specifications saying it would work with 5.5 to 7.5 HP engines.
Two differences between the Vevor pump and the MTD pump that i experienced. First, the discharge port in 1/2” NPT on the Vevor and 1/2” ORB on the MTD. Second, when splitting wood, the Vevor pump makes the engine stall as soon as the splitting head contacts the wood. If I temporarily stop the wedge before the engine stalls and then continue, it’s splits okay. I think the bypass pressure between the first and second stages is set too high.
Overall, it works, but needs to be used carefully to avoid stalling the engine.