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murray 18.5briggs

#1

E

exit1951

engine runs o.k. until it gets hot. then it backfires and dies.had it worked on. guy said he put on used coil,new sparkplug wire and adjusted valves.what can be wrong?


#2

I

ILENGINE

Get us the model number info off the engine. There are way too many possible engine combinations to give suggestions. Heck at this point the murray that you list has been made by three different companies.


#3

E

exit1951

ILENGINE said:
Get us the model number info off the engine. There are way too many possible engine combinations to give suggestions. Heck at this point the murray that you list has been made by three different companies.
Click to expand...

the model # on muffler is 31N707


#4

E

exit1951

exit1951 said:
the model # on muffler is 31N707
Click to expand...

Correction Model # is on valve cover


#5

I

ILENGINE

When the engine dies, try turning the key off and on a few times and listen for the click of the fuel solenoid on the carb. No click replace. if it does click then try restarting the mower. If it restarts there is a chance the plastic tip on the solenoid is coming off and shutting off the fuel, then when you turn the key off, it reseats the tip.


#6

E

exit1951

ILENGINE said:
When the engine dies, try turning the key off and on a few times and listen for the click of the fuel solenoid on the carb. No click replace. if it does click then try restarting the mower. If it restarts there is a chance the plastic tip on the solenoid is coming off and shutting off the fuel, then when you turn the key off, it reseats the tip.
Click to expand...

My son removed the solenoid already a couple of years ago.


#7

I

ILENGINE

Two things come to mind. Does it have a fuel pump, and if so may be quitting after it gets heat sinked. The other thing is the used ignition module is failing after it gets hot.


#8

E

exit1951

ILENGINE said:
Two things come to mind. Does it have a fuel pump, and if so may be quitting after it gets heat sinked. The other thing is the used ignition module is failing after it gets hot.
Click to expand...

Thanks,Ill check


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