12000 Kits

natural gas conversion kit

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Best kits, best instructions, and best support. "Carburetion is all we do!"


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.

Check Out


View Cart


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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




Yamaha 12000 Kits

We have all four types of kits for the Yamaha EF12000 EF12000DE generator.   If you're not sure what each type means, click on the Quick Help Links to the left for more details.

Ordering is easy.  Simply choose the type of kit you require based on your gas system that you have or will be getting.  Clicking on the appropriate Yes link will take you to the order page. 

Accessories can be ordered by choosing to "Continue Shopping" when checking out or can be viewed ahead of time by using this link: ACCESSORIES


Model Numbers






Type 1


Type 2


Type 3


Type 4




Yes Yes Yes Yes

 Special notes:

The Type 1 and Type 3 kits for this engine require a little better than average mechanical skill.  The carburetor is removed and the high speed jet, which is pressed in and sealed with a BB type plug, is drill out (upper arrow as shown below).  Once drilled, the hole has to be tapped with a standard 3/8-24 hand tap.  This can be performed using a vise and a corded or cordless drill  The original hole is enlarged so following the passage will keep automatically keep the drill bit straight.  The idle mixture screw is removed and a new vacuum fitting is supplied to pick up engine vacuum for the fuel cut-off safety system (lower arrow, aluminum disc is covering the screw. The disc is pried off and the screw is removed).

Click for a larger view.


The Type 2 and Type 4 Kits include an adapter the installs between the carburetor and the air cleaner assembly.  Three longer screws are included.  The idle mixture screw is also removed, as explained above, for the fuel cut-off safety system.

Click for a larger view.

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.