Making a Carburetor for an 1898 15 HP Reid Type A Gas Engine
Joel Sanderson crafts a custom carburetor for the engine that runs his home shop.
Joel Sanderson uses this 1898 15 HP Reid, serial number 578, to drive 90 feet of line shaft in his Michigan iron working shop. The demands on his engine for steady running required him to make a versatile carburetor that would respond quickly to varying loads, as well as allow him to easily run the engine on either gasoline or propane without making any permanent changes to the engine itself.
The carburetor from the valve side. The arm with the three holes connects to the butterfly. These holes allow for different sensitivity. The butterfly’s position is adjusted by the set screw on the bottom of this arm.
This drawing shows the carburetor’s general configuration. The idle jet valve requires a needle valve with very fine adjustment.
This drawing shows the main jet, made from a mig welder tip. The counterbored hole provides a broader surface for the airflow to sheer the gasoline into a finer mist.
The intake plumbing, which allows the engine to run on gasoline or propane.
Another view of the intake plumbing. The circular knob in the middle of the photo is the choke.
The extended fuel valve cross bar for the butterfly link. Each hole changes the engine’s speed 4 RPM, allowing independent speed adjustment for running on gasoline.
The adjustable fuel bowl. For the float to regulate the fuel level, Joel made a rotary valve which is not influenced by the pressure from the 300-gallon fuel tank.