Put the starter back in but do not hook it up
Put your car ( or your car's battery ) next to it.
Run a jumper to the heavy + terminal on the starter solenoid and the other jumper lead to a good ground on the engine case.
If hooked up right, nothing should happen.
Now with a bit of hook up wire bridge the + terminal to the terminal where the yellow wire went.
If the engine cranks over normally, the starter is good.
Now do the exact same thing using the mowers battery.
If the engine cranks over normally the mowers battery is good.
Hook up the starter to the mowers wiring .
Leave the jumpers in place
turn the key
Engine cranks normally = starting circuit is good
Remove the ground jumper lead
Engine cranks over normally = ground wire is OK
Remove the + jumper
Engine cranks normally = power wire is OK
Because they are exposed to the elements, the power & ground cables on ZTR's suffer from corrosion.
I clean up the contact areas, bolt them up tight on a hot day in the sun so the connection is dry then paint them with liquid electrical tape to keep moisture out.
This includes the exposed ends of the battery leads.
Moisture can wick down the wire from where it is exposed then corrode the wire inside the insulation.
When you test a lead like this, it shows 0 ohms but when you try to push amps through it all it does is generate heat.
On a really damp place like Hawaii consider replacing both battery leads with tin plated marine cables and still slap the liquid electrical tape over all exposed contacts.
The stuff peels off really easily but will keep the area dry & prevent corrosion.
Testing showed:
1. "Now with a bit of hook up wire bridge the + terminal to the terminal where the yellow wire went.
If the engine cranks over normally, the starter is good."
Starter cranked and solenoid fired the starter gear to the top of starter.
2. "Now do the exact same thing using the mowers battery.
If the engine cranks over normally the mowers battery is good."
Engine cranked....and, I put the mower batteries on the charger over night.
3. Was stopped at third test:
See attached photo taken just to the side of the starter mower. Battery positive is connected to starter. Battery negative post is attached to negative black wire leading to ground on the engine,. The yellow wire is not yet plugged into the starter. The connector plug in the photo is separated with the male blades on the left and the insertion (female) portion on the right.
Starting from the connector plug on the left with the male blades:
Key off - no volts on any connector;
Key on - 12.8 volts on the top left male connector. 12.8 volts on the bottom left male connector. No volts on the other two.
The connector plug (female) on the right:
The wire above the yellow wire (red?...I'm color blind) connects to the top left male blade of the connector plug on the left and is hot when the key is on. But, it isn't the yellow wire that is supposed to energize the solenoid.
The yellow wire connects to the second to the top left male blade of the connector plug on the left and is not hot when the key is on. So the yellow wire is not being energized.
This is the way it was when I unplugged the connector. Doesn't make sense. Where should the yellow wire connect? Where does that hot red wire go and should it bring the power back to the yellow wire.
Almost there....what do you guys think?