04582 Kits

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




04582 generac guardian

04582 Generac Guardian Ultra Source

If you're not sure what each type of kit means, click on the Quick Help Links to the left for more details.

Only multi-fuel kits are available for this generator.  There are many options available so please read all of the information regarding each type inorder to make Clicking on the  Yes link will allow you that kit to your shopping cart.

These kits are now complete and have the additional parts needed.  Please read the information at the bottom of the page before ordering.

 Accessories can be ordered using this link: ACCESSORIES



Type 1


Type 2


Type 2


Type 3


Type 4





Ultra Source


same as







with the GN990

Engine and the 04451

with the GN760 engine and the

2 barrel carburetor

  Yes     Yes

For those that have the Generac Model 04451 with the GN760 engine and the 2 barrel carburetor the following information is the same.  If your engine has a one barrel carburetor refer back to the 04451 Generac Kits page. 

The engine configuration for the Generac Guardian 04582 with the GN990 engine and the Generac Model 04451 with the GN760 engine with the 2 barrel carburetor is opposite of most other engines.  The manifold is on the outside of the generator cage.   When the adapter is installed between the carburetor and the air cleaner assembly the manifold is moved out 35mm.  We have purchased and converted this unit in our shop and have updated the kits.  Basically there are 2 options:

Adapter Type 2 and Type 4 Kit Installation:

 Click on the pictures to see a larger images. 

  The intake manifold must be unbolted and moved out 35mm to allow the 35mm (1.375") adapter (not shown) to be installed between the carburetor and the black plastic air cleaner assembly.  To compensate for the thickness of the adapter, the use of 35mm spacers and longer manifold bolts are necessary. The oil dip stick needs to be rotated as well.

This is one of the two manifold flanges that must be moved out 35mm.

The brass bowl vent port shown between the two barrels is removed when the adapter is installed.  The kit comes complete with the 35mm aluminum spacers, longer bolts and gaskets.

The unit performs very well and with full power on alternative fuel.  However, on gasoline, no more than 9000 watts is possible without stumbling the throttle system.  This engine has a motorized throttle that goes into a wide open conditon if a consistent 9000 watts is applied.  Again, it achieves full power on alternative fuel.

This unit works really well with the RSK accessory and can easily be remote started.

Carburetor Modification for Propane and Natural Gas:

We have designed a bi-fuel (propane/gasoline) and tri-fuel (propane/natural gas/gasoline) kit utilizing the OEM carburetor.  We machine 2 injector tubes into the carburetor and leave the gasoline system completely intact.  The same carburetor is used by both alternative fuel and gasoline on the fly.  Turn one on and the other off and vice versa.     No spacers or modification of the control panel is necessary and the generator produces full power on all fuels.

To order these kits you have 3 options. 


Place your order and a factory new carburetor and conversion kit will be sent.  When you receive it, remove your existing gasoline carburetor and slip the new one and it will be ready to run.  You can store your existing gasoline carburetor for future use.



Place your order first, then remove the "clean-brand new-never used" carburetor from your machine and send it to us.  When we receive the unused carburetor and it passes inspection, a kit will be sent with a "factory new" modified carburetor ready to bolt back on and run. 



Place your order first, then run the carburetor completely dry of gasoline.  Remove the "used" carburetor from your machine and clean any build up of dirt or grease.  Allow all gasoline vapors to dissipate.  Also check with your shipper for any additional requirements for shipping.  We will not modify a soiled carburetor.  Send the carburetor to us and when we receive it and it passes visual inspection, it will be assigned to a technician for modification.  When completed, the carburetor will be returned with the complete kit ready to bolt back on and run.




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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