Tri-Fuel Propane Natural Gas Conversion Kit Information
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Photo of an Adapter Installed on a
Troy-Bilt 1919 with a Briggs and Stratton 10hp
205400 series Engine
Tri-Fuel Kits use an adapter that makes it possible to operate
an engine on three different fuels; Propane, Natural Gas, and
Gasoline.
Adapters will mix the Propane or Natural Gas into the air
stream above the gasoline carburetor. The gasoline carburetor remains basically untouched.
The photo above illustrates how most adapters install on an
engine. Adapters are just that. They adapt to whatever
carburetor an engine has and are installed between the carburetor and air
cleaner. As you can see, the adapter is between the carburetor on the left, and the air cleaner assembly on the right.
This is basically how they operate:
The Adapter has a hose running to it from the
demand type regulator supplied in the kit. The center of the adapter has a
venturi. A venturi has an
opening in the middle
and its shape resembles a doughnut.
All around the trailing edge of the center opening are many small holes or slits. As air passes
through the center opening and over the many small holes, fuel from the regulator
is delivered to the air stream. How much fuel depends on how much air is passing
over the holes which depends on how far the throttle is open.
People often ask about power loss with the adapter style kits. We have never
had a complaint about power loss with any of our kits. The use of a
quality digital tachometer should show this
to be true.
A small readjustment of the main load screw will be required whenever the fuel is switched between
Propane and Natural Gas. To use gasoline just turn one off an the other
on. The engine runs on alternate fuel while the gasoline carburetor is
"out of gas".
So basically, adapter kits are not a conversion,
they are an adaptation.
The regulator used in the Tri-Fuel Kit can accept gas pressures up to 14"
water column. Natural Gas is usually 6" to 8" and Propane is
usually 11" to 14" on the low pressure side. (28" of Water Column
is equal to 1PSI of pressure)
Low Pressure, Tri-Fuel, Type 4 Kit Price
For Most Engine Brands Including Some V-Twins:
$267
Special two barrel carburetors like is used on some Hondas and Briggs
engines:
$297
Low Pressure Tri-Fuel Type C Kits Priced
For Most Engine Brands up to12hp:
$187
