Wiring or safety switch or something else?

[hrdman2luv]

I took a 19.5 briggs I/C Platinum (model 42E707) off of one frame and put it on another. I brought the wiring harness with it. The wiring harness one the newer frame was a little different, so I'm using the same one that was attached to that engine. The only thing I didn't transfer from the old frame to the new one, (as far as the wiring goes) are the safety switches. The safety switches are in the same place and have the same type plugs, that fit the harness. So, no modifications needed. At least none that I know of.

Let me explain a few things: I got this mower (LT1000) from someone who was tearing it apart because he couldn't get it to start.

I installed a new magneto because I wasn't getting spark from the original one. This particular model has two heads, but only one coil. (with two spark plug wires). From the main harness, there are 4 wires. In the engine harness there are 3. One is the kill wire for the coil. And the other two are together in their own plug. The go underneath the flywheel.

There is a red jumper wire going to the empty slot on the plug that connects the main harness to the engine harness.

Also, I've replaced the battery and the spark plugs.

The engine turns over great. Lots of RPM's. But no spark.

I have a voltage tester that has a lot of settings on it. I just don't know quite how to use it.

Any help would be greatly appreciated.

UPDATE>.. I forgot to mention that I haven't put the deck on it yet. But the lever to engage the mower is down. I turned it over, and tried to engage the blades, and it stopped turning over. So, I think that safety switch is right. Also, I released the clutch/break and tried to turn it over, and it wouldn't. Then sat in the seat to see if it would turn over, and it did. But wouldn't when I got up. So, I'm thinking that is OK also...

 

[BlazNT]

OK lets see if I can explain this. On safety switches there are 2 kinds.
1 Normally Open. This means that the wires are not touching each other until the switch is activated.
2 Normally Closed. This means the wires are touching each other until switch is activated.
I would check to see if the are different on each mower.

 

[hrdman2luv]

OK lets see if I can explain this. On safety switches there are 2 kinds.
1 Normally Open. This means that the wires are not touching each other until the switch is activated.
2 Normally Closed. This means the wires are touching each other until switch is activated.
I would check to see if the are different on each mower.

I understand what you're say, except I don't know how to check them. Do I need to use my test light?

 

[BlazNT]

Continuity tester would be better. It is part of a simple electrical tester.

 

[hrdman2luv]

Ok, so I took off the kill wire off the magneto, and still no fire.

I put my test light on the tab where the kill wire connects and turned the motor over, and I got flashes of light.

 

[hrdman2luv]

Ok, so I got a new mganeto installed. And I'm getting spark now. But, it won't it's not coming through the spark plug. I can touch the plug wire to the motor, frame, exhaust or just about anything grounded. But, when I touch it to the end of the spark plug, no spark at all... When I plug it in, and touch the spark plug to things like the exhaust, engine, head or anything else grounded, no spark at all..

When the plug is screwed in, and the wire connected, I put a little gas in the carb, and no fuel fires. Not even with starting fluid....

 

[BlazNT]

Check the gap on the spark plug.

 

[hrdman2luv]

Check the gap on the spark plug.

When I have the plug screwed in, but the wire off the plug, there's no spark when I make contact with the wire end, and the plug... Even if the gap was off a little (unless it was touching), there'd still be a spark between contacts.

I hope I'm not coming off rude. But this one little problem is driving me batty. I've got a lot of time and money into this, and have just about got it finished...

New carb parts, lots of deck parts (bearings, blades, springs) magneto, plugs, cables, and other things..

 

[BlazNT]

did you gap the magneto?

 

[hrdman2luv]

did you gap the magneto?

Yes, with a business card.