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Get a knock when turning the key

#1

B

ba_50

31p977
0575 e1
Tried to start but the battery was dead. Put a charged one in and it ran for a few minutes. Got off and it quit. It only made a knocking sound on top left corner of the motor cowling. I noticed that when getting up and down on the seat it made the knocking sound.

Don't know what is wrong.
Thanks
Bob


#2

M

MParr

Have you checked the seat safety switch?


#3

B

ba_50

I unplugged it. Wouldn't that take it out of the equation? Used too.


#4

StarTech

StarTech

ba_50 said:
I unplugged it. Wouldn't that take it out of the equation? Used too.
Click to expand...
Just unplugging the seat connector can be a problem as many systems that ground the ignition system when the operator is off the seat now contain a shorting strip. Others requires 12v to be passed when the operator is on the seat to keep a relay closed.

As for the knocking noise first make the engines mounting bolts are tight. From there if the noise persists that I would suspect internal engine problem like a broken counter balance link. One other thing I seen just a few time is the top bushing to worn out allowing the flywheel flop around.


#5

M

MParr

ba_50 said:
I unplugged it. Wouldn't that take it out of the equation? Used too.
Click to expand...
No! Unplug it and make up a jumper wire to go into the wiring connector. Once you do that, sit n the seat with the parking brake on and try to start it. If it starts and remains running, you have a bad seat safety switch. Replace the switch and hook the wiring back up.


#6

StarTech

StarTech

MParr said:
No! Unplug it and make up a jumper wire to go into the wiring connector. Once you do that, sit n the seat with the parking brake on and try to start it. If it starts and remains running, you have a bad seat safety switch. Replace the switch and hook the wiring back up.
Click to expand...
Unless know we which safety system the OP has, unplugging, jumping, or other method is all guess work. The OP need to post the equipment make and model number from the serial number tag so someone here can look it up.


#7

S

slomo

StarTech said:
Unless know we which safety system the OP has, unplugging, jumping, or other method is all guess work. The OP need to post the equipment make and model number from the serial number tag so someone here can look it up.
Click to expand...
Great advice sir.

Mower might have 12 volts going through it and some jumper to ground could burn the mower to the ground. Garage in flames, kids bikes on fire, grand children playing in the yard, wife's shoes might get torched LOL.

slomo


#8

M

MParr

Then, I stand corrected.


#9

StarTech

StarTech

MParr said:
Then, I stand corrected.
Click to expand...
It was just advice as I have seen both systems here. Even JD uses both systems and you got know to which you are dealing with.

So far I only seen one ZTR burned to the ground.
2dm1dxF.jpg


#10

M

MParr

StarTech said:
It was just advice as I have seen both systems here. Even JD uses both systems and you got know to which you are dealing with.

So far I only seen one ZTR burned to the ground.
2dm1dxF.jpg
Click to expand...
I had two Toros and both of them had the cheapest seat safety switches imaginable. I had to jump both until I could replace them. Heck, my last one had a cheap reverse/brake switch. That was a constant headache.


#11

S

slomo

MParr said:
I had two Toros and both of them had the cheapest seat safety switches imaginable. I had to jump both until I could replace them. Heck, my last one had a cheap reverse/brake switch. That was a constant headache.
Click to expand...
Thanks for replacing the safety switches. Most people bypass them and could have problems in the future. As in serious problems.

slomo


#12

S

slomo



#13

B

ba_50

I am embarassed to say this, but the blade engage knob was still out. This is the first type of mower I have used so I didn't notice it under the steering wheel. Sorry to waste your time. Too many safety systems for one thing. Thankyou.


#14

B

bertsmobile1

No reason to be embarressed
We have all done it
I would get called out at least 5 times a season cause " the mower stopped while I was mowing & now won't start "


#15

StarTech

StarTech

MParr said:
I had two Toros and both of them had the cheapest seat safety switches imaginable. I had to jump both until I could replace them. Heck, my last one had a cheap reverse/brake switch. That was a constant headache.
Click to expand...
Most the Toro mowers uses a 12 v system through the seat switch. Just be thankful that either don't the electric brake module or that it hasn't fail. It is a very expensive part. The last one I replaced including the wiring harness failed while sitting on repair yard. It started cycling on its own and before I could the tools and disconnect the battery it release the magic smoke. My vendor didn't even want to warranty it, saying I should replace the wiring harness. I said why do you think I the harness when I ordered the module? Then okayed the replacement.


#16

M

MParr

StarTech said:
Most the Toro mowers uses a 12 v system through the seat switch. Just be thankful that either don't the electric brake module or that it hasn't fail. It is a very expensive part. The last one I replaced including the wiring harness failed while sitting on repair yard. It started cycling on its own and before I could the tools and disconnect the battery it release the magic smoke. My vendor didn't even want to warranty it, saying I should replace the wiring harness. I said why do you think I the harness when I ordered the module? Then okayed the replacement.
Click to expand...
My first one (MX5000) had an electric brake module. My second one (ZX5400) didn’t.


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