[Southeast Power]

I have a long time friend with a Guardian 5262 that is vintage 2006.
It's a 3600 rpm unit.
It has an over speed alarm on it.
I had to replace the fuel solenoid a couple of weeks ago and then discovered the coil was not producing a spark.
Discovered by pulling the wire off of the rotor and looking for a spark between the end of the wire and the exhaust manifold.
I usually see a spark and then receive a nice shock.
None of that happened.
So I replaced the coil.
Still no spark.
I pulled the control board and the voltage regulator and tried them on another similar unit and they worked fine.
This unit is an hour drive so, it's a three hour " on my dime" kind of thing until I can get it running.
What controls the coil input?
Any Guardian Guru's out there?

When I bought the coil, it seemed to also belong on a Hyundai or something like that.

 

[Southeast Power]

I did change the position sensor.
Could this relate to the problem?

 

[nrp3]

Position sensor? It could be that the white harness that connects the coil or coils to the wiring harness is shorted to ground, ie its the shutdown and I believe where it gets its speed reference. I can get out the books tonight.

 

[8V71]

I did change the position sensor.
Could this relate to the problem?

Did you change it before or after no spark? It's an important part of the ignition system (spark timing) if it's what I think it is.

 

[nrp3]

Mmmm... liquid cooled maybe?

 

[Southeast Power]

Yes liquid cooled.

 

[Southeast Power]

Position sensor? It could be that the white harness that connects the coil or coils to the wiring harness is shorted to ground, ie its the shutdown and I believe where it gets its speed reference. I can get out the books tonight.

The two wires that supply the coil 9A and 25, seem to go directly to the plug on the main board.

 

[Southeast Power]

Did you change it before or after no spark? It's an important part of the ignition system (spark timing) if it's what I think it is.

I changed it before the coil, bottomed it out and then backed it off about 1/2 turn.
Does that sound like a correct installation?

 

[8V71]

I changed it before the coil, bottomed it out and then backed it off about 1/2 turn.
Does that sound like a correct installation?

Sorry, I can't say if that is right. No Generac experience, just going on general engine knowledge.

 

[8V71]

Most engines are shut down by killing the spark so I would be checking into whatever does that on this generator before replacing any parts. Maybe even a low oil sensor?

 

[nrp3]

You may also want bring this over to the forum at Ziller electric in the liquid cooled section of the forums.

 

[Southeast Power]

It turned out to be the magnetic pickup coil that is threaded into the top of the alternator.
It was the first part I replaced and, unknown to me at the time, I didnt seat it properly and the end of it was sheared off by the wheel.
I didnt suspect that part was bad out of the box but removed it and found my mistake.
I borrowed one from another generator.
$80 (plus shipping) lesson.
FWIW, to properly install the MPC, bump the engine until you position one of the fins under the mounting hole, bottom out the MPC, them back it off TWO full turns.

 

[RFguy]

I have found lots of good Generac info over at the Ziller forum. Some very knowledgeable guys that that don't mind sharing.