engine problem

[regeland]

John Deere LA 115 19.5 briggs and stratton starts cold runs 5 minutes and cuts off. loses spark. Has a new spark plug new gas filter, new air filter. Anyone else have this problem?

 

[bertsmobile1]

Pull the kill wire off the coil
If the problem remains the coil is bad
If the problem vanishes the wiring is faulty

 

[regeland]

Thanks I will try that .

 

[shadetree#1]

What is the engine model and type?

 

[regeland]

What is the engine model and type?

Model 31P677
Type 0132 B1
Code 071008ZD
Got it running but now it stalls when I engage the blades. Will not start again until it cools down.

 

[shadetree#1]

Has symptoms of the electronic possibly failing in the magneto. (if it's not the spark plug)
You can find a magneto for less than $20. If it turns out to not be the magneto, you need a spare anyway, because they are prone to failure eventually.
Be careful and keep a heads up when loosening the two magneto 5/16 headed screws, they can twist off and both are needed I take a small hammer and give them each a few light taps to free the steel screws threads in the aluminum block. You can watch a you tube video about such.

Set the air gap at .010.

 

[mechanizm]

do the simple stuff first. change the plugs.

also: how did you check for no-spark?

It's possible that it's running rich which is why it starts and runs good cold. if so buy a cheap carb on ebay.

 

[The Specialist]

I have come across this a few times. 1) ensure that the ground wires are secure and are making contact. It usually has a bolt going through an eye let at the back of the engine on the frame, and 2) if you have a pull switch to activate the blades, make sure that the loom part is pushed all the way onto the switch. These models have been known for the plastic plug with the wires vibrating apart. And 3) your ignition switch-is it in good condition. I have had it where the ignition switch breaks on the inside and as soon as it has power going through it, the tang inside grounds out the coil circuit.

 

[chuckpen]

You can also check the effective ground between the coil and the engine mounting point. also, clean both the coil contact point where it contacts the engine and the same place on the engine side. Make sure the coil is tight to the engine with good groud between. Do Not over tighten the mounting screws, you can damage the mounting bosses. Use a business card to set the gap between the coil and flywheel magnets after reattaching the coil.

 

[Zue]

John Deere LA 115 19.5 briggs and stratton starts cold runs 5 minutes and cuts off. loses spark. Has a new spark plug new gas filter, new air filter. Anyone else have this problem?

If the spark is going away after 5 minutes(or motor warming up) then consider the coil being a problem. Coils that are failing with sometime work when cold but stop working when hot.