New husqvarna z254 , wont start after turning off with blades engaged

[cableguy1169]

was letting friend try new zero turn.
he shut key off while it was mowing.
it wont turn over , not even a noise.. It feels
like there is still tension on belt that engages blades.
I can hear click when trying to use pto switch. but still no turnover.
is there a manual way to disengage pto?
please help....

thanks

 

[BlazNT]

Sounds like you blew a fuse. Also make sure all the other parts are in starting position. You may be stressing over him turning with PTO on that you are over looking parking break, lap bars in neutral and butt in seat.

 

[cableguy1169]

Sounds like you blew a fuse. Also make sure all the other parts are in starting position. You may be stressing over him turning with PTO on that you are over looking parking break, lap bars in neutral and butt in seat.

idk..
I checked fuse , good
I checked both switches for park ,good
tried bypass seat sensor , no change
its weird..checked power to starter solenoid when turin g key to start , getting power
if I jump solenoid , motor turns over. I think its a safety thing?
I just bought it new , two weeks ago..i just think its something simple..

dazed and confused

 

[bertsmobile1]

The Seat switch has noting to do with starting a ride on engine

Just about universally the power goes from the live wire on the starter solenoid to the B ( battery) terminal on the ignition switch via a fuse .
From the B terminal the ignition switch sends power to the S (start ) terminal to the PTO switch and from there to the brake / lap bars and finally to the trigger terminal on the starter solenoid.
This type of starting circuit uses a 3 terminal starter solenoid.

The next most popular starting circuit uses a 4 pole starting solenoid.
In this type the power goes directly from the PTO switch to the solenoid
The ground terminal gets it's ground through the lap bar switches and brake switch.

The last type uses a relay to energise the starter solenoid .
Usually the wire from the PTO switch goes to the + trigger and the - ( ground ) goes to the negative trigger wire.

If you go to the Husqvarna web site, customer service section and download the parts book, the wiring diagram is in the back.
It should also be in the back of the owners manual.

 

[BlazNT]

The Seat switch has noting to do with starting a ride on engine

Just about universally the power goes from the live wire on the starter solenoid to the B ( battery) terminal on the ignition switch via a fuse .
From the B terminal the ignition switch sends power to the S (start ) terminal to the PTO switch and from there to the brake / lap bars and finally to the trigger terminal on the starter solenoid.
This type of starting circuit uses a 3 terminal starter solenoid.

The next most popular starting circuit uses a 4 pole starting solenoid.
In this type the power goes directly from the PTO switch to the solenoid
The ground terminal gets it's ground through the lap bar switches and brake switch.

The last type uses a relay to energise the starter solenoid .
Usually the wire from the PTO switch goes to the + trigger and the - ( ground ) goes to the negative trigger wire.

If you go to the Husqvarna web site, customer service section and download the parts book, the wiring diagram is in the back.
It should also be in the back of the owners manual.

I have to respectfully disagree with you on the seat switch not being needed to start a ride on. My brother bought a 60" Husqvarna commercial mower (3 years old) and it will crank but not start till butt is in seat. I do not know his model number but if he can remember it I will post. It is the first mower I have come across that requires it. You can get off the mower after you start it but it will just not start until you sit in the seat. Seeing this mower we are trying to fix is a Husqvarna I figured it might have the same thing going on.

 

[bertsmobile1]

Blaz, stop for a second and have a think about it.
How the hell do you service the mower if you can not start it without a bum on the seat ?
And then most dangerous place to be running a mower with the seat switch bypassed is in a service bay where the tech will be anywhere except in the drivers seat.

The seat switch is not in the starting circuit on any mower and will not be till the computer controlled fuel injected ones come out a bit later on.
The seat switch is in the safety circuit so the mower will not drive nor engage the blades without a bum on the seat and shortly the bum will have to be over 30 Kg ( 65 lbs) so children can not drive away on a mower.
Earth moving machines down here are currently being fitted with weight sensitive seats to stop kids joyriding in them on weekends when they are left on site.

I checked fuse , good
I checked both switches for park ,good
tried bypass seat sensor , no change
its weird..checked power to starter solenoid when turin g key to start , getting power
if I jump solenoid , motor turns over. I think its a safety thing?
I just bought it new , two weeks ago..i just think its something simple..

So he has a 4 pole solenoid and the safety GROUND circuits are preventing the solenoid from energizing by not grounding the trigger.
Page 30 on the owners manual shows very clearly the GROUND connection to the 4 pole starter solenoid passing through both lap bar switches then through the ( unnamed ) parking brake switch and finally to the GROUND terminal on the starter solenoid.

Now if Cableguy is still hanging around, he can verify this by hooking up a patch lead from any grounding point to the ground terminal on the solenoid ( the black wire ) which he should be able to find easily as he has already verified that the yellow wire is getting 12 V like it should.
Then he can work backwards to find which switch is not working or which ground wire is not making proper contact.