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Hank F.
Hank F., Technician
Category: Small Engine
Satisfied Customers: 14900
Experience:  Certified on Onan and Generac generators
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Oman two cylinder generator air fuel adjust? Black plugs.

Customer Question

Oman two cylinder generator air fuel adjust ? Black plugs . Runs then cuts out.
Submitted: 1 year ago.
Category: Small Engine
Expert:  Hank F. replied 1 year ago.

Hello, my name is ***** ***** I am going to assist you with this.

There are many versions of the basic CCK engine, and not all of them are the same.

What is the full model number of your unit?

Customer: replied 1 year ago.
3cr / 1202 r. 5occk
Customer: replied 1 year ago.
Hank I am a low vision DAV one eye has an implant fixed for distance the other eye has a cataract from a service connected brain injury. Please be patient .
Customer: replied 1 year ago.
Definitely a down draft carb
Customer: replied 1 year ago.
Serial number is(###) ###-####
Expert:  Hank F. replied 1 year ago.

Not a problem - thank you for your service, fellow vet (Go Army!).

On this unit, the initial carb settings are as follows:

Idle needle - 1 to 1 1/4 turns out from lightly seated

Main needle - 1 1/4 to 1 1/2 turns out from lightly seated

I have uploaded the adjustment procedure for you.

Click here to download it.

Customer: replied 1 year ago.
Does the main fuel adjustment valve sit on top from the fuel line feed side?
Customer: replied 1 year ago.
I can not see it from the exposed side.
Customer: replied 1 year ago.
Expert:  Hank F. replied 1 year ago.

It depends on whether you have the Zenith carb or the Walbro.

The idle adjust is a screw that is on the back side.

On one of the carbs, the main adjust is a "T" nut right beside the idle screw.

On the other, the main adjust is a "handwheel" on the front of the carb.

Customer: replied 1 year ago.
Expert:  Hank F. replied 1 year ago.


Did you get the adjustment procedure?