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

[Scott Hall]

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.
>
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