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why wont my 18 hp briges&straton engine start and stay runnung…

why won't my 18 hp...
why won't my 18 hp briges&straton engine start and stay runnung when it is hot from running?
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Answered in 41 minutes by:
9/14/2013
Technician: Curtis B., Technician replied 8 years ago
Curtis B.
Curtis B., Technician
Category: Small Engine
Satisfied Customers: 43,338
Experience: have worked on and around most engine models for 35 yrs./Polaris ATV expert
Verified

Curtis B. :

Welcome to JUST ANSWER small engines, let me try to help you !!

Curtis B. :

Model number of the engine? Example(NNN) NNN-NNNNE1

Curtis B. :

How old is mower? Ir starts and runs ok cold, but looses power and won't restart when hot?

Curtis B. :

Flat head engine or OHV engine?

Customer:

I will get that information tomorrow and forward it to you. Thank you for your time.

Curtis B. :

Thank you!

Customer:

earlier today i sent you the information you requested previously.

Curtis B. :

I see no information!

Customer:

here is that info again: craftsman lt 1ooo 18hp ohv intek family:YBSXS-5012VF 274826

Customer:

bought mower in 2003

Curtis B. :

That is a family number but not the model number. I assume it is single cylinder , overhead valve engine?

Curtis B. :

If that is the case, take a spare spark plug, and when it dies, remove the spark plug cable, attach the cold plug and with plug grounded, see if you have spark.

Curtis B. :

If you have no spark when hot, you have a bad coil/magneto and will need to replace the coil.

Curtis B. :

Here i show the Briggs ignition works, and all Briggs use the same type ignition.

Curtis B. :

give me the model number of the mower from under the seat and I will see if the engine is listed in the parts book. The model will be exampleNNN-NN-NNNN/p>

Customer:

the model number NNN-NN-NNNN/p>

Curtis B. :

31H777-0202-E1 looks like model of engine. The coil is








Briggs and Stratton 795315
Curtis B. :

This would cause engine to quit when hot and not restart until cold. Is this what is happening?

Curtis B.
Curtis B., Technician
Category: Small Engine
Satisfied Customers: 43,338
Experience: have worked on and around most engine models for 35 yrs./Polaris ATV expert
Verified
Curtis B. and 87 other Small Engine Specialists are ready to help you
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Customer reply replied 8 years ago

Curtis,


Your answer to the problem that the magneto needed to be replaced was exactly right. I changed out the magneto and the mower is running fine.


Thank you,


John Bowie

Technician: Curtis B., Technician replied 8 years ago
Good job! Thank you!
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Curtis B.
Curtis B.
Curtis B., Technician
Category: Small Engine
Satisfied Customers: 43,338
43,338 Satisfied Customers
Experience: have worked on and around most engine models for 35 yrs./Polaris ATV expert

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