Have fun and save money by making your own fuel mixer
A schematic illustrating the new mixer that Ed made for his Ottawa (Figure 2 in the text).
Figure 3: A look inside the mixer that Ed made, showing the needle valve and fuel nozzle.
Figure 4: Ed wasn’t able to bore the venturi so he decided to cast the venturi in place using kids’ sidewalk chalk. The chalk fit snug in the ball seats, so Ed filed some vents into the chalk to allow the molten lead and air to flow over it for the pour.
Figure 1: In an effort to get a 1922 4 HP Ottawa ES 4282 running again with minimal expenses, Ed Stoller made his own mixer based on the original shown.
Figure 5: In order to keep the chalk from floating in the molten lead Ed fashioned a length of perf strap to hold the chalk down.
Figure 6: The venturi of the mixer with the removable ball seat unscrewed, and after some clean up.