Larry, I'm not sure how small you want, but I have a Homelite AP-125, very small, lightweight, 2 cycle engine (and I don't find the specs in the manual), came with a 1" diameter suction hose and strainer. You can use a 1" outlet hose, or use any garden hose (which is what I've always done) with the adapter than came with it. It was priced at $169.00 in '95 at the same lawn and garden shop where I bought my Cub Cadet riding mower. It's rated at 1860 gph (undoubtedly through a 1" hose and less with a garden hose). The manual has a phone number of 1-800-242-4672 to call for the nearest servicing dealer.
When we were burning brush, we just put two 55 gallon barrels of water and that pump on a little trailer behind the tractor to stop any fire that tried to spread.