I’m wondering what the highest volume pump I could get for a Honda GX270 engine. It’s about 8.5 HP. Thanks
Everything I’ve seen is 3.5 gpm. I’ve been using the GX270 for 5 years now.
It will depend on what kind of pressure you are looking for…… gpm x psi divide by 1100 will be rough needed hp for a gasoline engine. If you can live with 100psi you can push a good 90 gpm …. 
