Biggest pump to match with a honda gx390?

[tireshark]

@upstatepressure

any link to how its done?

Upgrading my GX390 to 5.5 GPM... question

Call or email Russ Johnson at Southside Equipment. Tell him you want to upgrade the GX390 to gear driven 5.5. The pump i received was HP5535UR, with an unloader. Things are working great with it. Here is a play by play. It was a lot larger than the original pump, and more than i was expecting. I still had my pressure washer on the cart that came with it, but no way it would work with this pump. So first thing i did was remove the wheels and frame. [IMG_0420] After that, it’s pretty m…