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#4626804 - 01/07/18 11:15 AM Natural Gas GE/Briggs&Stratton Generator No Start
Sam_Julier Offline


Registered: 05/22/12
Posts: 432
Loc: Connecticut
I have an 8kw GE backup generator. Engine is a Briggs&Stratton Model 310000, 500cc, single cylinder. I don't know if the engine is Intek or Vanguard model. The engine has 30.5 hours total time. Engine would not start at 5 degrees and shut off the exercise cycle. Attempts to start in Manual mode were successful but only on the second or third try. Spark plug was changed from the OE (Champion RC12YC) to the Briggs&Stratton Premium Platinum 5066K plug. At 0 degrees this morning the engine started the first time but after 33 seconds of roughness. But it started on its own. I am thinking of having a service call to check the fuel regulator. Are these engines running on NG typically harder to start than gasoline? I've noticed that when the temp is < 10 degrees the engine stumbles for 10-20 seconds before catching. Thanks in advance for any suggestions.

Sam


Edited by Sam_Julier (01/07/18 11:19 AM)
_________________________
2005 Highlander 3.3L PC Duron 0W30, 47k
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#4626810 - 01/07/18 11:20 AM Re: Natural Gas GE/Briggs&Stratton Generator No Start [Re: Sam_Julier]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
It's so hard to say without looking at more info/docs.

I would like to know what type of "enriching circuit" is used at those cold temps.
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#4626816 - 01/07/18 11:25 AM Re: Natural Gas GE/Briggs&Stratton Generator No Start [Re: Sam_Julier]
CT8 Offline


Registered: 10/09/14
Posts: 10979
Loc: Idaho
Spark and fuel,,,, go from there.
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#4626817 - 01/07/18 11:25 AM Re: Natural Gas GE/Briggs&Stratton Generator No Start [Re: Linctex]
Sam_Julier Offline


Registered: 05/22/12
Posts: 432
Loc: Connecticut
Originally Posted By: Linctex
It's so hard to say without looking at more info/docs.

I would like to know what type of "enriching circuit" is used at those cold temps.


The manuals don't mention a thing about this.
_________________________
2005 Highlander 3.3L PC Duron 0W30, 47k
1993 Volvo 245 Delo 10W30, 140k
1993 Volvo 244 Delo 10W30, 152k


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#4626821 - 01/07/18 11:28 AM Re: Natural Gas GE/Briggs&Stratton Generator No Start [Re: Sam_Julier]
bubbatime Offline


Registered: 03/18/08
Posts: 5627
Loc: South Florida
I dont think you have a problem. Engines are hard to start when its cold. Especially engines that haven't been ran in a while. Maybe run your engine more often, especially right before you are expecting a big storm.
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#4626836 - 01/07/18 11:38 AM Re: Natural Gas GE/Briggs&Stratton Generator No Start [Re: Sam_Julier]
DNVDMAX Offline


Registered: 11/20/07
Posts: 258
Loc: Richmond, VA
Cold, non-synthetic oil possibly contributing to the problem?
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#4626843 - 01/07/18 11:43 AM Re: Natural Gas GE/Briggs&Stratton Generator No Start [Re: Sam_Julier]
JTK Offline


Registered: 08/14/03
Posts: 10581
Loc: Buffalo, NY
With the colder than normal ambient temps we're having and the draw on the natural gas infrastructure, it may not be getting quite enough NG to cold start. You could experiment by putting a heating pad around the carb/intake to see if it will (extreme) cold start easier.
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#4626844 - 01/07/18 11:45 AM Re: Natural Gas GE/Briggs&Stratton Generator No Start [Re: DNVDMAX]
Sam_Julier Offline


Registered: 05/22/12
Posts: 432
Loc: Connecticut
Originally Posted By: DNVDMAX
Cold, non-synthetic oil possibly contributing to the problem?


5W30 Havoline Pro DS Full Syn in the sump.
_________________________
2005 Highlander 3.3L PC Duron 0W30, 47k
1993 Volvo 245 Delo 10W30, 140k
1993 Volvo 244 Delo 10W30, 152k


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#4626853 - 01/07/18 11:48 AM Re: Natural Gas GE/Briggs&Stratton Generator No Start [Re: JTK]
Sam_Julier Offline


Registered: 05/22/12
Posts: 432
Loc: Connecticut
Originally Posted By: JTK
With the colder than normal ambient temps we're having and the draw on the natural gas infrastructure, it may not be getting quite enough NG to cold start. You could experiment by putting a heating pad around the carb/intake to see if it will (extreme) cold start easier.


During the manual start tests I shut off the heat and on demand hot water - 317,000btu's together. Maybe it started faster but hard to tell.

Sam
_________________________
2005 Highlander 3.3L PC Duron 0W30, 47k
1993 Volvo 245 Delo 10W30, 140k
1993 Volvo 244 Delo 10W30, 152k


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#4626857 - 01/07/18 11:50 AM Re: Natural Gas GE/Briggs&Stratton Generator No Start [Re: Sam_Julier]
NYEngineer Offline


Registered: 12/12/06
Posts: 1570
Loc: NY, NY
What are the plugs gapped at? They need to be at 20-22.

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#4626861 - 01/07/18 11:52 AM Re: Natural Gas GE/Briggs&Stratton Generator No Start [Re: NYEngineer]
Sam_Julier Offline


Registered: 05/22/12
Posts: 432
Loc: Connecticut
Originally Posted By: NYEngineer
What are the plugs gapped at? They need to be at 20-22.


Spec is .030. New plug installed today is exactly .030. Sam
_________________________
2005 Highlander 3.3L PC Duron 0W30, 47k
1993 Volvo 245 Delo 10W30, 140k
1993 Volvo 244 Delo 10W30, 152k


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#4626871 - 01/07/18 11:58 AM Re: Natural Gas GE/Briggs&Stratton Generator No Start [Re: Sam_Julier]
eljefino Offline


Registered: 06/15/03
Posts: 32637
Loc: ME
You potentially may not need an enriching circuit.

We have a choke on gasoline engines because some of the fuel doesn't atomize and remains as useless droplets that condense in the intake.

Natural gas is gas all the time and should be stoichometric. I tend to agree with the theory of your neighbors' houses using more gas for heat but we need to know what pressure is supposed to be at the street/ mainline level vs coming out of your meter.

I have a 3-way carb on my pull-cord generator, a chinese jobby. It came w/o instructions and has a choke but I assume just for gasoline use.

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#4626873 - 01/07/18 12:02 PM Re: Natural Gas GE/Briggs&Stratton Generator No Start [Re: Sam_Julier]
eljefino Offline


Registered: 06/15/03
Posts: 32637
Loc: ME
Originally Posted By: Sam_Julier
Originally Posted By: JTK
With the colder than normal ambient temps we're having and the draw on the natural gas infrastructure, it may not be getting quite enough NG to cold start. You could experiment by putting a heating pad around the carb/intake to see if it will (extreme) cold start easier.


During the manual start tests I shut off the heat and on demand hot water - 317,000btu's together. Maybe it started faster but hard to tell.

Sam


Do you switch (almost) the whole house over for the ten minute run? I thought they just exercised without much of a load during the self-checks.

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#4626889 - 01/07/18 12:11 PM Re: Natural Gas GE/Briggs&Stratton Generator No Start [Re: eljefino]
Sam_Julier Offline


Registered: 05/22/12
Posts: 432
Loc: Connecticut
Originally Posted By: eljefino
Originally Posted By: Sam_Julier
Originally Posted By: JTK
With the colder than normal ambient temps we're having and the draw on the natural gas infrastructure, it may not be getting quite enough NG to cold start. You could experiment by putting a heating pad around the carb/intake to see if it will (extreme) cold start easier.


During the manual start tests I shut off the heat and on demand hot water - 317,000btu's together. Maybe it started faster but hard to tell.

Sam


Do you switch (almost) the whole house over for the ten minute run? I thought they just exercised without much of a load during the self-checks.


The exercise cycle runs weekly for 20 minutes with no load. It's primary purpose is to recharge the battery (I think). On the first of every month I flip the switch on the main panel to simulate power loss from the grid and exercise the generator too.

Sam
_________________________
2005 Highlander 3.3L PC Duron 0W30, 47k
1993 Volvo 245 Delo 10W30, 140k
1993 Volvo 244 Delo 10W30, 152k


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#4626895 - 01/07/18 12:14 PM Re: Natural Gas GE/Briggs&Stratton Generator No Start [Re: Sam_Julier]
eljefino Offline


Registered: 06/15/03
Posts: 32637
Loc: ME
^ smart.

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