interplexr I looked at the three clear water pumps on Harbor Freight. How can they make a 6.5 hp for that price? But it looks like the 37 gpm would run a sprinkler. When you get into high gph pumps you have to buy a special suction hose that is wire reinforced so it won't collapse. If I was you I would call Harbor Freight and ask them these questions.

6.5 HP 212cc 2 In. Gas Engine Clear Water Pump 9540 GPH $189

1.5 79cc 1 In. Gas Engine Clear Water Pump 37 GPM $159