20601 Old State Road, Haubstadt, Indiana 47639
In this, the last of a three part series on fuel mixers used on
Hercules built engines, the various kerosene mixers will be
During the 1914-16 period both the Hercules and Economy brand
engines were available as kerosene hit and miss and gasoline only
versions. The kerosene version apparently wasn’t very popular
because they are seldom seen. There were two versions. The earlier
one is shown in Figure 1. It had a two valve mixer with a three way
cock to switch from the gasoline starting tank (No. 97) to the main
tank in the engine base. One valve on the mixer adjusted the fuel
and the other adjusted the water when running on kerosene.
Figure 2 shows the later version. The primary difference is the
use of a three valve mixer and the elimination of the three way
cock. The mixer had a gasoline valve, a kerosene valve and a water
Both of these kerosene systems were available as original
equipment. The complete attachment could be ordered to convert a
gasoline hit and miss engine to a kerosene hit and miss engine.
It’s doubtful that many of these conversion kits were sold.
KEROSENE MIXING VALVE ONLY No. 90
KEROSENE ATTACHMENT COMPLETE No. 109
MIXING VALVE ONLY.. No. 90
OUTFIT COMPLETE AS SHOWN No. 109
Figure 3 illustrates an engine equipped with the three valve
Figure 4 shows a cutaway view of the kerosene mixer used on
throttling governed Hercules kerosene engines models EK through XK
and 6 and 8 HP Economy kerosene engines model XK. The mixer had a
fuel bowl that was filled with gasoline for starting and warm up.
It was then switched to kerosene.
Figure 5 illustrates the kerosene mixer used on the 1 and 2 HP
model SK, the 1 through 3 HP model XK and 1 and 2 HP JK
Coming up next will be stories as told by some former Hercules
Gas Engine Company employees.
THE Hercules kerosene carburetor was designed to make possible
the use of kerosene as a satisfactory fuel and is the result of
almost ten years’ experimental work upon the part of one of the
best engineers in the United States and one who is considered
authority on internal combustion engines.
The importance of this feature is specially appreciated in
foreign markets where the cost of kerosene is so much lower than
that of gasoline.