28 series runs with wire disconnected.

[Bogart]

Hi

Thanks for letting me join your forum first of all.

Now my query.

My Westwood mower has a 14.5HP BS 28 series engine. The other day it would not start but turns over fine. After checking I found there was no spark at the plug. So delving deeper I have found that if I disconnect the thin grey wire that goes to the Armature/magneto it starts and runs fine. As soon as I reconnect it fails to start. Not sure what this wire is doing and should it have 12volts on it with the ignition turned off? Seems odd it runs with it disconnected. Any thoughts on this?
Regards

 

[SeniorCitizen]

The reason it starts and runs fine is you have disconnected the wire that grounds the mag which was put there to kill the engine if the key is turned to OFF. Or if any one of the safety switches that calls for the engine not to start or die if one of those switches function is breached. The key switch is often changed by a WAG but is seldom the problem.

 

[Bogart]

Hi

Have checked the ignition switch and seems to be working okay so this wire is getting grounded somewhere else in the machine. As it is now dark it will have till wait until morning.
Thanks for replying.

Regards

 

[gainestruk]

Check all safety's, seat, clutch/brake if you have owners manual look in it to see where they all ar, I think one of the safety switches is your problem.

 

[SeniorCitizen]

With little knowledge of how advanced your in electric, please excuse me if I seem if I'm talking to a 1st grader, when I actually was just graduated from kenny garten myself, but you may encounter a dual switch in your trouble shooting of safety switches. It may look similar to the pictured with 4 wires, but don't allow it to intimidate you.

This switch has 2 sets of contacts to connect for two different purposes but not simultaneous . One set of contacts connect 2 wires to assist in completing the cranking circuit. The second set of contacts connect the other two wire ends to assist in completing the safety shut down circuit because you engaged the PTO either manual or electric.

This description is only an example and not an AS BUILT to depict your tractor in any way, shape or form.

 

[Tinkerer200]

That gray wire you mentioned that connects to the coil should never have 12 volts on it as that will destroy the ignition coil.

Walt Conner

 

[ALUCAN]

Hi

Thanks for letting me join your forum first of all.

Now my query.

My Westwood mower has a 14.5HP BS 28 series engine. The other day it would not start but turns over fine. After checking I found there was no spark at the plug. So delving deeper I have found that if I disconnect the thin grey wire that goes to the Armature/magneto it starts and runs fine. As soon as I reconnect it fails to start. Not sure what this wire is doing and should it have 12volts on it with the ignition turned off? Seems odd it runs with it disconnected. Any thoughts on this?
Regards

Hi There. Same fault on my Westwood S1400 with 14.5HP single cylinder B&S Engine. I have sorted most of this, but Magilla Gorilla (auto-electrician-failed, previous owner) had hard wired most of the safeties and removed the ignition cut-out. Engine stop was on the fuel solenoid only.

I am left with the final non-start problem to cure having put the wiring loom (mostly) back to original; just final fault finding.

Would it be an imposition to ask for your engine series ID (not the full number) as the B&S number on my engine cover has corroded away. That will allow me to get the correct B&S Parts List and Service Sheets without the current guesswork. (Countax/Westwood do not keep traceable engine numbers, only the engine type and date of tractor manufacture - which is July 2005 in my case).

Many Thanks.

 

[Bogart]

Hi

No problem will get later on today.

 

[Bogart]

It is a 280H00 series engine.

Sorry in the delay.

Regards

 

[bertsmobile1]

Hi There. Same fault on my Westwood S1400 with 14.5HP single cylinder B&S Engine. I have sorted most of this, but Magilla Gorilla (auto-electrician-failed, previous owner) had hard wired most of the safeties and removed the ignition cut-out. Engine stop was on the fuel solenoid only.

I am left with the final non-start problem to cure having put the wiring loom (mostly) back to original; just final fault finding.

Would it be an imposition to ask for your engine series ID (not the full number) as the B&S number on my engine cover has corroded away. That will allow me to get the correct B&S Parts List and Service Sheets without the current guesswork. (Countax/Westwood do not keep traceable engine numbers, only the engine type and date of tractor manufacture - which is July 2005 in my case).

Many Thanks.

If you clean off the cover with steel wool or scotchbright pad, not abrasive paper the take several photos at different angles with a digital camera on a stand of some kind so it will be in sharp focus.
Now load the photos into your computer and play with the contrast
Generally the number will become very apparent.
If not then invert the colours ( make a negative in some photo apps )

Note this needs to be done with a real camera set to the highest resolution, not a phone or I pad thingy.