522xi - Starts 2sec then stalls

[Fordiesel69 272]

I was not operating it, but in the middle of a mow it shut off like someone turned the key.  Once we towed it back, it just starts and within 2 sec dies.  If I hold the key in the start position, magically it still runs.  

 

Seat switch is good as I have parking brake fully set.  I jumped the switch just to be sure.  Oil level is at F.  Not sure how to check further.  

[gwest_ca-(File Mod) 12,304]

I don't know if all model years are the same or not.

Will guess at this one. Download the file and in it is a diagram for just the ignition. Easy to follow.

 

[Handy Don 16,815]

Deleted previous info. Misread the schematic...

Edited yesterday at 07:05 PM by Handy Don

[JoeM 10,066]

Make sure your red wire is hooked up the carb anti backfire solenoid and you can hear an audible click when turning it to the run position.

[Bill D 2,960]

34 minutes ago, Handy Don said:

Likely electrical and since it runs while being held in start (much to the dismay of the starter motor, I’m sure) I’d suspect the switch itself may be giving intermittent on the internal contact with the “I” terminal while in the Run position but being OK when in the Start position. 

I’d begin by voltage checking the wiring starting at the “I” (ignition) terminal on the switch. It should have 12v when the key is in Run or Start positions--and be sure to wiggle the key while it’s in the Run position to see if that affects anything! I’d also carry the voltmeter around and once it stalls out, immediately (without touching ANYTHING ELSE) check for voltage at the “+” terminal on the coil. No voltage there means no spark and gives you a starting place to find out why!

Does the xi series have a powered ignition?  I thought those had a magneto?

[Handy Don 16,815]

26 minutes ago, Bill D said:

Does the xi series have a powered ignition?  I thought those had a magneto?

You are correct. I saw an I terminal on the switch instead of the M and thought battery.

 

[gwest_ca-(File Mod) 12,304]

They use a battery style ignition switch to power a kill relay to control the magneto ignition.

[Handy Don 16,815]

3 minutes ago, gwest_ca said:

They use a battery style ignition switch to power a kill relay to control the magneto ignition.

Elegant, especially since it permitted combining other safety switches in that circuit. 

[953 nut 66,973]

Your charging system has a diode that feeds the fuel shut-off solenoid while the engine is running. The solenoid is fed directly from the key switch in the start position.

Take a look at the VIOLET colored wired from the charging system to the fuel solenoid and its diode.

[953 nut 66,973]

29 minutes ago, Handy Don said:

Elegant, especially since it permitted combining other safety switches in that circuit. 

That system has been used by Wheel Horse for years, primarily on Briggs powered B & C series tractors.

Here is a thread I did a few years ago that shows how simple it is.

 

[Bill D 2,960]

2 hours ago, gwest_ca said:

They use a battery style ignition switch to power a kill relay to control the magneto ignition.

That makes more sense.   Thanks for the clarification. Maybe change the kill relay. 

Edited yesterday at 10:09 PM by Bill D

[953 nut 66,973]

1 hour ago, Bill D said:

Maybe change the kill relay. 

I have helped several people with this "2 second run time" problem and in each case it was the wire or diode from the stator to the fuel solenoid. Kill relay couldn't do the 2 second trick but in the START position the fuel solenoid will open long enough to allow a couple seconds worth of fule into the carb.

9 hours ago, Fordiesel69 said:

If I hold the key in the start position, magically it still runs. 

The fact that holding the key in the start position allows the engine to run tells you the fuel solenoid works and the diode on that wire prevents back-feeding the ignition switch and if the kill relay was not working there would be no ignition.