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Hi, I have an issue with my Briggs and Stratton engine it starts and then the engine suddenly dies after 10 seconds and the exhaust is red hot within a couple seconds, what could be causing the immediate cut off of the engine. Carb has been replaced and lawnmower has been serviced.

Brian58 said:

Hi, I have an issue with my Briggs and Stratton engine it starts and then the engine suddenly dies after 10 seconds and the exhaust is red hot within a couple seconds, what could be causing the immediate cut off of the engine. Carb has been replaced and lawnmower has been serviced.

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Failure within the muffler?

shiftsuper175607 said:

Failure within the muffler?

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The muffler itself? Would that cause the engine to just die suddenly?

If it is blocked or partially blocked.
If the valve lash has closed up then fuel burns inside the muffler which will cause the muffle to glow red very quickly.
The valve gets more sticky and eventually the engine stops.

A partially sheared flywheel key can cause the engine to be retarded a little so the charge is still burning when the exhaust valve opens, however keys generally fail advanced.
A coil too far from the flywheel also retards the spark with the came result and generally it will be a bit more difficult to start.

If you want us to help you more, then you have to help us
Engine model & code numbers ?

Where will I find the engine model number? I see numerous numbers on stickers on the mower?

The exhaust is not part of the engine so those numbers are not need to find your exhaust. You will have to have the mower model numbers or whatever your engine is on to find

Is this the code on here?

For the engine look on valve cover

Sorry for the delay, I've found the codes. Model: 1P777 Type: 0134B1 Code: 081118ZD.

Missing the first digit.
should be 21p 31p or 41p

Have you checked the valves ?

More than likely a 31 Single cylinder OHV I did one not long ago. Actually 20 or 30 this year........

Yeah your right it's a 31P