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#4597123 - 12/07/17 01:02 PM Generator carb solenoid question
Arsigi Offline


Registered: 12/05/17
Posts: 5
Loc: Washington
Greetings,

I have a Champion 41430 generator with a minor issue. The carburetor took some external damage, so I replaced it. After installing the new carb, it will start for a short period (~10 seconds or so) and then die. I did some diagnostics and found that the voltage going to the carb fuel solenoid is very low (~1-2v) and only lasts for a second or two, causing me to suspect that it is just enough current to let a tiny bit of fuel in, then closes again.

My main concern is, am I correct in assuming that the solenoid should be receiving a full 12v, and that that should be constant when running? I can easily wire in my own switch to make that happen, I just wasn't sure if there might be some sort of variable voltage and variable fuel amount that I wouldn't be taking into consideration. It seems like it would almost certainly be only "on/off" but I thought it best to get a second opinion or two on that.

I did find info elsewhere that gives me pause. Specifically, a similar Honda carb (supposedly these Champion units are Honda clones?) where the solenoid/valve is normally open when no current is applied, and only gets closed for a short time after shut-down to prevent backfire. So I may be misunderstanding how mine works, and barking up the wrong tree.

Thanks for any input!

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#4597127 - 12/07/17 01:04 PM Re: Generator carb solenoid question [Re: Arsigi]
Arsigi Offline


Registered: 12/05/17
Posts: 5
Loc: Washington

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#4597245 - 12/07/17 03:18 PM Re: Generator carb solenoid question [Re: Arsigi]
Oldmoparguy1 Offline


Registered: 01/21/05
Posts: 5613
Loc: Charlotte, NC
If this is a B & S engine, then yes, there should be +12V on it when the key is on. It has a plunger that closes the main jet on the carb when you turn off the key. The solenoid is there mainly to prevent a shutdown backfire.

Good luck,

Wayne
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#4597252 - 12/07/17 03:29 PM Re: Generator carb solenoid question [Re: Arsigi]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
I usually just cut the tip off of the needle and leave the wires disconnected. I hate spending time troubleshooting stuff when the fix is that easy, but that's just me.
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#4597270 - 12/07/17 03:49 PM Re: Generator carb solenoid question [Re: Arsigi]
Arsigi Offline


Registered: 12/05/17
Posts: 5
Loc: Washington
Thanks! After doing yet more searching, I am fairly confident it is a B&S engine - I found what looks like a mechanically identical one made under the B&S brand name. Will play with it this weekend, if it is warm enough(!).

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#4597372 - 12/07/17 06:03 PM Re: Generator carb solenoid question [Re: Arsigi]
GravelRoad Offline


Registered: 05/30/15
Posts: 168
Loc: Virginia
From the owners manual I'm 99% sure it's a chonda engine, Chinese Honda copy/counterfeit.

Anti-fire solenoid needs 12v when starting/running.

Or do what Linctex posted.
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#4597382 - 12/07/17 06:13 PM Re: Generator carb solenoid question [Re: Arsigi]
motor_oil_madman Offline


Registered: 11/29/09
Posts: 4858
Loc: Houston, Texas
So let me guess this solenoid fails and makes it so the engine starves for fuel?
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#4597397 - 12/07/17 06:31 PM Re: Generator carb solenoid question [Re: Arsigi]
boraticus Offline


Registered: 04/19/09
Posts: 2909
Loc: Canada
A B&S engine on a Chinese built Champion generator? Really?

I had a 2011 Champion 4000/3000 watt generator and it had a 196cc Honda clone engine.

One wouldn't think B&S would be supplying engines to Champion?

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#4597433 - 12/07/17 07:08 PM Re: Generator carb solenoid question [Re: motor_oil_madman]
GravelRoad Offline


Registered: 05/30/15
Posts: 168
Loc: Virginia
Originally Posted By: motor_oil_madman
So let me guess this solenoid fails and makes it so the engine starves for fuel?


Yes. You are correct.

Solenoid needle pulls down away from main jet with voltage. (Assuming the carb is not gummed-up)

No voltage the spring in the solenoid moves up and shuts off main jet starving it of fuel.

Hope this helps.
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#4597534 - 12/07/17 09:02 PM Re: Generator carb solenoid question [Re: Arsigi]
motor_oil_madman Offline


Registered: 11/29/09
Posts: 4858
Loc: Houston, Texas
The float still stays keeps the needle and seat seated correct?


Edited by motor_oil_madman (12/07/17 09:03 PM)
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#4597618 - 12/07/17 10:14 PM Re: Generator carb solenoid question [Re: motor_oil_madman]
GravelRoad Offline


Registered: 05/30/15
Posts: 168
Loc: Virginia
Originally Posted By: motor_oil_madman
The float still stays keeps the needle and seat seated correct?


Yes.
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#4597966 - 12/08/17 11:01 AM Re: Generator carb solenoid question [Re: boraticus]
Arsigi Offline


Registered: 12/05/17
Posts: 5
Loc: Washington
Originally Posted By: boraticus
A B&S engine on a Chinese built Champion generator? Really?

I had a 2011 Champion 4000/3000 watt generator and it had a 196cc Honda clone engine.

One wouldn't think B&S would be supplying engines to Champion?


I honestly don't know one way or the other for sure - I had read on another forum that they were Honda clones, but then I also found this:

https://www.homedepot.com/p/Briggs-Strat...30549/203180791

Which is the same displacement, same power features, and visually the motor appears to be the same as the one I have - only difference I see is a slightly different air filter.

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#4598326 - 12/08/17 05:18 PM Re: Generator carb solenoid question [Re: Arsigi]
cronk Offline


Registered: 01/06/09
Posts: 1288
Loc: Watertown, New York
Champion uses their own China made Honda clones.
Not sure why you wouldn't be getting power. I take it this one is electric start with a small battery.
Make sure the battery is charged up and any electric connections between the battery, switch and solenoid are clean and tight.
Check no wires have chaffed an rubbed through the insulation.
If all else fails, I have done what Linctex suggested on a couple small engines with no problem, only down side is you may get a small backfire after shut down.

Those Champions are a good generator, my 3500/4000w unit is around 8 years old and working great!
IMO one of the best budget generators out there!
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#4598875 - 12/09/17 10:13 AM Re: Generator carb solenoid question [Re: cronk]
jonnied1 Offline


Registered: 10/16/16
Posts: 126
Loc: WV
Originally Posted By: cronk
Champion uses their own China made Honda clones.
Not sure why you wouldn't be getting power. I take it this one is electric start with a small battery.
Make sure the battery is charged up and any electric connections between the battery, switch and solenoid are clean and tight.
Check no wires have chaffed an rubbed through the insulation.
If all else fails, I have done what Linctex suggested on a couple small engines with no problem, only down side is you may get a small backfire after shut down.

Those Champions are a good generator, my 3500/4000w unit is around 8 years old and working great!
IMO one of the best budget generators out there!


approved

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#4598919 - 12/09/17 11:19 AM Re: Generator carb solenoid question [Re: Arsigi]
JTK Offline


Registered: 08/14/03
Posts: 10589
Loc: Buffalo, NY
Yep, like Cronk said, are you showing 12+ VDC at the battery with the unit not running? If you're not, the solenoid will never pull off and open up fuel to the engine.

I've never seen a portable generator with a shut-off solenoid on the carb, but I've only worked on a few with batteries on them and E-start equipped.
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