Tri-Fuel Kits

propane generator conversion kit

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We have Professionally Equipped Yamaha Generators Ready to run on Propane, Natural Gas and Gasoline. Click here to learn more . . .      Want help figuring out which kit to order?  First try our "What Kit Do I Need?" page and

also the new "Simple Explanation" page!





Some Kit Order Links on individual pages are no longer functioning.  We apologize for the inconvenience during this website update.  If the ones on your page are not functioning, please verify what kit is available for your unit and then

click this link "KIT LIST PAGE FOR ALL GENERATORS AND ENGINES" to go to this temporary kit listing page.


Search for any Generator or Engine number. See results below:


Help Links


ALL ENGINES 12hp or smaller use

A & C Kits


ALL ENGINES 13hp or Larger use

Type 1 Kits

Dedicated High Pressure Propane


Type 2 Kits

Bi-Fuel Propane and Gasoline


Type 3 Kits
Dedicated Natural Gas and Low Pressure Propane

Type 4 Kits
Tri-Fuel Natural Gas, Propane, and Gasoline


Remote Start
The parts needed to start a generator remotely by wire or even wireless


What Kit do I need?

Don't know what kit is best for your application?

Click this link for a Simple Chart that should help you decide what is your best kit choice.

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Monday August 09, 2010

News & Features

Kit Production Update:


 is currently at:

1-3 days

As always, some kits take a little longer due to heavy order volume. 

Kit Center Regular Hours of Operation:

Monday thru Friday

9:00 am - 4:30 pm

Eastern Time.


If you require assistance please fill out a request form using this link

Tech Help

 or the email address found in your Master Conversion Instruction Booklet.




Use your credit card and safely and securely  order on-line.  Or call our office toll free at :


 Monday thru Friday 9-4:30 Eastern time.  You can place your order over the phone if you feel more comfortable doing that or if you would like to speak with a company  representative to answer any further questions you may have. 

Please check our BASIC INFO page first.




For our Canada customers call us here in the U.S. toll free at




Tri-Fuel Propane Natural Gas Conversion Kit Information


tri-fuel conversion kit generator

Click for larger view

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:

venturi.jpg (14790 bytes)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:


Special two barrel carburetors like is used on some Hondas and Briggs engines:


 Low Pressure Tri-Fuel Type C Kits Priced For Most Engine Brands up to12hp:


Use this link to CONTACT US by filling out a request form or contact us

in the U.S. at 1-800-553-5608

or toll free from Canada to our US office 1-800-486-0077.

US Carburetion Kit Center

416 Main Street * Summersville * West Virginia * 26651

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