How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Hank F. Your Own Question
Hank F.
Hank F., Technician
Category: Small Engine
Satisfied Customers: 14560
Experience:  Certified on Onan and Generac generators
19372534
Type Your Small Engine Question Here...
Hank F. is online now
A new question is answered every 9 seconds

I have a 10 kw generator. tries to start, shuts down on

Customer Question

I have a 10 kw generator. tries to start , shuts down on overchrank. noticed choke stays closed. unplug wire for choke, it will start
Submitted: 3 months ago.
Category: Small Engine
Customer: replied 3 months ago.
It is a generac 10 kw Mod. #0058710
Customer: replied 3 months ago.
Posted by JustAnswer at customer's request) Hello. I would like to request the following Expert Service(s) from you: Live Phone Call. Let me know if you need more information, or send me the service offer(s) so we can proceed.
Customer: replied 3 months ago.
If you need a phone #(###) ###-####
Customer: replied 3 months ago.
I was told it would be in 8 minutes , that was at 4:29
Customer: replied 3 months ago.
Posted by JustAnswer at customer's request) Hello. I would like to request the following Expert Service(s) from you: Live Phone Call. Let me know if you need more information, or send me the service offer(s) so we can proceed.
Customer: replied 3 months ago.
If you don't know ,could just let me know.It has been a day
Customer: replied 3 months ago.
Is there anyone there. I think I have allready paid for this
Expert:  Hank F. replied 3 months ago.

What is the serial number of the genset?

Customer: replied 3 months ago.
Customer: replied 3 months ago.
Has new plugs and air filter.
Expert:  Hank F. replied 3 months ago.

Is the choke cycling open and closed while the engine is cranking, or does it just stay closed?

Customer: replied 3 months ago.
it closes but does not open back up right away, failing on over chrank
Customer: replied 3 months ago.
But if I disconnect the choke it will start
Customer: replied 3 months ago.
I have been waiting for a email on your reply. Did not know I had to log into the web site.
Customer: replied 3 months ago.
It is like what ever is controling the choke is not opening soon enough and flooding out
Customer: replied 3 months ago.
when it tries to start the choke closes it starts cranking , the choke opens for less than a second then closes again and then shuts down on over chrank
Expert:  Hank F. replied 3 months ago.

OK. First check to see if you can manually move the choke. It should move freely, with no sticking or binding.

Next, unplug the choke solenoid. Set a meter to read DCV.

On the female side of the plug, the side going back to the controller, connect the red meter lead to wire 14, and the black meter lead to wire 90.

Set the switch to MANUAL. You should see voltage for about 2 seconds, and then no voltage for about 2 seconds, and it should repeat.

Next, set your meter to ohms. On the male side of the plug, connect one meter lead to each pin. It does not matter which lead goes to which pin. You should get a reading of 3.7 ohms.

Let me know what you find.

Customer: replied 3 months ago.
Power to the wire for 2 seconds , power off for less than a second then on for 2 seconds. the generator starts with out the wire on. 45 deg. outside temp..coil is 3.2 ohms. the choke moves freely.
Expert:  Hank F. replied 3 months ago.

That choke is staying closed for too long. The choke is powered directly by the controller.

Customer: replied 3 months ago.
I Know thats what I have been saying
Expert:  Hank F. replied 3 months ago.

By what is happening, I would say the controller is bad.

I have been a Generac technician for almost 15 years, and have never seen a controller fail like that.

It does not make sense why the unit would only run with the choke solenoid disconnected. The unit should still run even if the choke is fully closed. That is how the low speed exercise works, by closing the choke to make the engine run slower.

It looks like you are going to need to replace the controller.

Customer: replied 3 months ago.
The unit does not have a low speed exercise , yes the choke is controlled by the main board. I knew that .Is there a way to reset the controller .
Expert:  Hank F. replied 3 months ago.

Yes, this unit can be set up for low speed exercise.

No, there is no way to reset the controller.

Customer: replied 3 months ago.
I think I hit the call me by by accident . I do not want the call.