[Shop-talk] B&S mower engine, surging and dying. Ideas?

[David Hillman]

    Yes, it does, but I tried removing the cap to no avail.  Thanks.


On Mon, 20 May 2019, Scott Hall wrote:
> This. Sounds like it's running just long enough to get a vacuum on the fuel
> tank, then starving for gas. Then sitting until the tank reaches
> atmospheric again. Then repeat.
>
> On Mon, May 20, 2019, 7:43 PM Pat Horne via Shop-talk <
> shop-talk at autox.team.net> wrote:
>
>> Try leaving the fuel cap loose to see if that helps.
>>
>> Will it start up when it dies with starting fluid.
>>
>> Peace,
>> Pat
>>
>> Pat Horne
>> We support Habitat for Humanity
>>
>>
>> On May 20, 2019, at 4:57 PM, David Hillman via Shop-talk <
>> shop-talk at autox.team.net> wrote:
>>
>>
>>   Ok, I'm out of ideas.  Requesting new ones.
>>
>>   I have a Craftsman walk-behind mower with a 163cc Briggs & Stratton
>> 4-stroke engine ( engine: 104m02-0008-f1 to be precise ).  It's only 3 or 4
>> years old, but it will not run.  And it's starting to piss me off.
>>
>>   It starts normally ( no manual prime or choke, so it takes ~3 pulls but
>> it always has ), and runs fine for less than 5 minutes.  After that, it
>> surges rhythmically and after a minute or so of that, dies.  Following
>> that, it will not re-start until allowed to rest for a few minutes.
>>
>>   I have installed a new plug, new air filter, new carburetor, and new
>> ignitor.  I checked and set the gap on the plug and the ignitor to spec (
>> .030" and .006-.014" respectively ).  Has clean oil, and brand new gas.
>> Fuel screen in the tank is clean, as is the fuel hose to the carb. Carb
>> bowl has fuel.
>>
>>   What else can be wrong with it?  It seems to be heat-related, but it has
>> no cooling system.
>>
>>   Thanks.
>>
>> Obligatory Shop Content: I can't work on anything interesting until this
>> damn mower runs.
>>
>

--
  David Hillman