Riddle me this! Any ideas

[dustrtin1975]

i have a LA115 jd mower with a single cylinder briggs and strtton , i have a new oem carb, a new oem head , and a new oem coil,
this thing will run for about 8 to 10 minutes and then starts to flood out as if you were pushing the choke on and off with the throttle cable. jusr for a second or two,
any thoughts?

 

[dustrtin1975]

could to much crankcase pressure cause the fuel pump to push to much fuel?

 

[Rivets]

Please post all engine numbers so we have an idea which engine you have. Intek engines used one carb for use with gravity feed systems and another for those equipped with fuel pumps.

 

[dustrtin1975]

engine modle is 31p677-0123-b1

 

[Rivets]

Need the code number to see when the engine was built.

 

[Rivets]

Should have added, name on the both carbs and part number of the carb you purchased.

 

[dustrtin1975]

engine modle is 31p677-0123-b1

070607ZD

 

[Rivets]

Your engine was built in 2007 and should use a Nikki carb, Briggs part number 594605.

 

[dustrtin1975]

im not sure what carb i purchased, however it is the only one that JD has available for it

 

[Rivets]

Just because that was the only one your JD dealer had available, doesn’t mean it is the correct carb. You have a 16 year old unit and I’m willing to bet they never looked up which engine you have. They changed carbs in 2016. Look on your receipt or call the dealer for the carb number.