Carburetor Conversion

natural gas 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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Thursday August 05, 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




Please Note: Type 2 and Type 4 kits and the Type C kits do not require drilling the carburetor.  These pictures are for dedicated Type 1, Type 3 and Type A kits only.

*   *   *   *   *   *   *   *   *   *   *   *   *   *   *   *

Carburetor Conversion Process

for Type 1, Type 3, and Type A Kits

Be sure to review our free offer below.


Here is the still image conversion of a standard carburetor.  This carburetor happens to be from a Yamaha EF2600 but most of the Briggs and Stratton, Honda, Generac, Kawasaki, Kohler, Kubota, Mitsubishi, Onan, Tecumseh, Robin Wisconsin, and many other engines are quite similar in their conversion technique.  Each step that is describe is not exactly what you will find on all carburetors but the premise is still the same; the carburetor is removed, drilled and made ready for the alternate fuel tube and then reinstalled.  Click on any of the pictures below to get a larger image.

Step 1 - Remove the carburetor from the engine.

This requires removing the air cleaner cover.  After the cover is removed the filter element is then removed.  Remove the nuts that hold the lower section of the air cleaner housing to the mouth of the carburetor. Remove these two nuts and any other bolt that may be used to hold on the air cleaner.



Step 2 - Disassemble all the parts that are attached to the carburetor.

This requires removing the bowl screw, float bowl, float pin, float, needle, high speed jet and nozzle and idle mixture screw.

Step 3 - Drill the carburetor and make ready for reinstalling.

Install the new vacuum fitting into the idle mixture port. The main passage up through the carburetor is not large enough for the new fuel tube to fit so it has to be drilled out.  This usually requires a 15/64 or 17/64 drill bit.  Drill up the main passage of the carburetor as shown until the bit appears in the air stream.  Drill the inside of the idle vacuum fitting for a stronger vacuum signal.  Install the new fuel tube which is now held up into the carburetor by the same threads that used to hold on the float bowl.  Using the supplied silicone, seal up all ports other than the idle fitting and the main fuel tube.

Step 4 - Allow the silicone to set for 24 hours.

The carburetor is now converted and ready to reinstall. The finished carburetor should be allowed to sit for at least 24 hours to allow the silicone to set firmly so that no silicone is drawn into the air stream.

Step 5 - Reinstall the carburetor on the engine.

Reverse the process of removal to reinstall the carburetor.  Attach the engine regulator to the frame, cut and install the vacuum and fuel hoses and the unit is ready to connect to the alternative gas supply.


* * * Free Service * * *

If you feel you can not perform these steps, or simply do not want to, you can send us your carburetor and we will convert your carburetor "Labor Free" and send it back to you ready to put back on your engine.  Simply add the free service to your shopping cart and we will hold your order until we receive your carburetor.  Add additional kit processing time to complete this free service.  For brand new engines, before removing your carburetor, run the engine from 1-1/2 to 2 ours on gasoline with an electrical load to assure that the rings have seated and that the unit functions correctly.  Ship your carburetor insured via UPS or USPS to:

US Carburetion Kit Center

Attn: SIC

416 Main Street

Summersville, West Virginia 26651

Click here to add the free service to your shopping cart. (This can be added before or after you choose your kit.)

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

Copyright 1995-2010  US Carburetion, Inc.  All rights reserved.