Trains, I've been fiddling with an Evinrude 85 hp V4, and found that the same fuel pump was apparently used for motors from 6 to 235 hp. (Above around 100 hp they used dual pumps.) Point being there is apparently a lot of excess capacity in these pumps. You can get a clone on Amazon for around $20 and on ebay for less. The Briggs style pumps apparently work too, if you don't care that the setup doesn't look original. I got one from China for around $5.00 shipping included, but haven't tried it yet.