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2006 JD L115 19hp B&S OHV Irratic Idle When Cold?

#1

J

JonnyBlaze

Can you guys listen to my youtube video and tell me what's going on with this? Thanks. I drained all the gas, changed fuel filter, let it run before hooking fuel line back up to make sure all the old gas was out of it, etc...

https://www.youtube.com/watch?v=EKsDgLKP7XY&feature=youtu.be


#2

B

bertsmobile1

It is called surging.
The mower runs short of fuel and starts to slow down so the governor opens the throttle wide and the engine picks up speed then the fuel level in the float bowl drops and the engine drops speed so the governor opens up the throttle again.
99,99% of the time is is because there is a blockage in the fuel supply.
Time to remove the carb and clean it , drain the fuel tank ( checking for water ) replace the fuel filter.
check the fuel tank for debris blocking off the fuel outlet.

There is a slim chance that the fuel pump is not working properly but most that get replaced are perfectly good as they rarely give problems.


#3

J

JonnyBlaze

bertsmobile1 said:
It is called surging.
The mower runs short of fuel and starts to slow down so the governor opens the throttle wide and the engine picks up speed then the fuel level in the float bowl drops and the engine drops speed so the governor opens up the throttle again.
99,99% of the time is is because there is a blockage in the fuel supply.
Time to remove the carb and clean it , drain the fuel tank ( checking for water ) replace the fuel filter.
check the fuel tank for debris blocking off the fuel outlet.

There is a slim chance that the fuel pump is not working properly but most that get replaced are perfectly good as they rarely give problems.
Click to expand...

I did everything but inspect the carb. Ordered a new one for $25. Cheap enough. Fuel pump works great. I saw the new fuel filter fill up when cranking it over after I drained all the old gas out of it.


#4

B

bertsmobile1

JonnyBlaze said:
I did everything but inspect the carb. Ordered a new one for $25. Cheap enough. Fuel pump works great. I saw the new fuel filter fill up when cranking it over after I drained all the old gas out of it.
Click to expand...

I do hope it was an original one and not a cheap Chinese copy off evil pay.
A lot of the cheapies have been what Kohler & Briggs rejected as being below acceptiable quality standards.
I have had some problems with customers fitting them then refusing to believe their new carb was not working properly.


#5

J

JonnyBlaze

bertsmobile1 said:
I do hope it was an original one and not a cheap Chinese copy off evil pay.
A lot of the cheapies have been what Kohler & Briggs rejected as being below acceptiable quality standards.
I have had some problems with customers fitting them then refusing to believe their new carb was not working properly.
Click to expand...
It had 5 star reviews. Ive bought 2 different cheap carbs in the last 2 weeks for different machines and bolted them right on and never had a problem. Didnt even have to adjust them.


#6

J

JonnyBlaze

I decided to go ahead and clean the carb while I was waiting for new one. Took it apart and of course the o ring gaskets didn't like the air exposure. Cant find a rebuild kit locally so I ordered it online.

Also, regarding that small jet that fell out when I took it apart. Which way does that go into the holder? I'm assuming the narrow end goes towards the gas solenoid plunger?

31P877 0110 E1 Carb part number 594593


#7

J

JonnyBlaze

Update, I rebuilt the factory carb and it started right up and runs perfect. Thanks for the info.


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