Question about Ariens 34 In 344 CC Briggs Stratton Hydrostatic Zero Turn Mower

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Won't turn over

Battery is good, seat safety switch has continuity, parking break shut off seems OK. Blade is turned off. What am I missing? Why won't it turn over. Mike

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If you have an ohm meter test the starters positive lead pole to the starters housing. if continuity is shown the starter is at fault

Posted on May 26, 2010

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Craftman 18 hp won't start with key


Check Battery. If headlight equipped turn key to headlight on position and see if headlights are lit. No light dead battery dead tractor,

Charge battery. If after charging weak or no start forget the battery and get new, Life of battery is two to three years,

If battery good make sure that parking brake set and blades are not engaged. Safety lockout will prevent tractor from cranking. The tracker has a safety interlock on the seat that requires a body warm or cold sitting on the seat if the parking brake is not set. The seat switch is known to fail. Try bouncing on the seat?

OK if battery OK and seat is sat or park brake set we can assume the safety interlock circuit is disabling the start circuit.

Need model to provide more answers
.
This website video shows how to check the component. Your model would be similar.
How to test lawn mower electrical safety switches

This electrical diagram is for a typical lawn tractor. Your model would be similar but different . This will give you an idea. The switch on the seat has two sets of contacts.26045611-oxnapdkevdwqbvzn03d44ye1-1-0.png

Jan 09, 2016 | Garden

1 Answer

Craftsman lawn mower 917270810 will not start


When the ignition key is turned to the start position you should have a 12 volt supply to the low tention wire at the solinoid, if not you need to check if there is a 12 volt supply to the back of the ignition switch, if not there is a break in the wiring to one of these components, also check that there is a good eart to the chassis from the black battary leed.

Jul 07, 2012 | Craftsman 42 in. Deck 19.5hp Lawn Tractor

1 Answer

My 50" troy bilt zero


All riding mowers have a seat safety, blade engage safety and a brake clutch safety, some mowers have a reverse mowing safety. Seat under the seat, blade and brake you will have to check the linkages underneath, and if there is a reverse mowing one I have seen them near the shifter handle right under the fender.

Aug 23, 2011 | Garden

1 Answer

YARD MAN 42 '' RIDEING MOWER WON'T START PROBABLY SAFETY PROBLEM


safety switches that all riding mowers seem to have include a seat/brake safety which means that you have to be sitting in the seat or the brake must be engaged for it to start. also there is the blade engaged safety, which means the mower will not start normally with the blades engaged.
if you meet those conditions check the switches themselves
non safety related, do you hear a click or a clunk when you turn the key to the start position, this is the starting coil pulling in to send power from the battery to the engine starter, all safety switches will interupt power from the key switch to the starting coil
if you hear the coil energize and the engine does not start you have low battery voltage or loose connection or some other mechanical problem

Jul 03, 2011 | Craftsman 25cc Gas Line Trimmer

1 Answer

Husqvarna 17530 stalls when engaging the blade. Seems to run fine else wise/


Does engaging the pedal for the PTO lug the engine down, or does it just die like turning off the key?
If it lugs the engine down, then you need to make sure you can spin the spindle and idler pulleys by pulling the belt by hand. You should be able to slip it around the engine pulley enough with the blade pedal disengaged. Pull the belt up tight so the slack is around the engine pulley and try to spin the blade spindle and idler pulleys.
If it dies like turning off the key, then its likely a safety switch and may require a meter to test which.

The seat switch is has a shunt in the circuit that must be satisfied in order for the rest of the circuit to be happy. Make sure the connections are good, the pins inside the amp connectors will sometimes spread, push out of the lock etc. and if connection is lost will not work. Otherwise a new seat switch will be needed. You might check the PTO switch for continuity, without a diagram or schematic I am not sure how your circuit is wired. you have to have the parking brake engaged to get off the mower while the engine is running and the PTO is Dis-engaged?
I don't know if your "go" pedal eliminated this switch or not. But if with the parking brake engaged and the PTO disengaged, you lift off the seat and it dies, then its the seat switch.

Hope this helped Tim

May 21, 2011 | Husqvarna 24HP 54" Yard Tractor ()

1 Answer

Leplease explainon the safety switchs on mtd models660-679 work? I beleave my model is an intek twin. thank you


Hi,

The safety switch beneath the seat is only one part of the several interconnecting safety features of the modern riding mower. If the system works properly, you must be seated for the mower deck to operate. The tractor will continue running with the Power Take Off disengaged if the parking brake is set before the operator leaves the seat.The seat switch consists of two electrical contacts normally separated by an air gap. A spring creates an open space between the two contacts. Mounted between two plates, the switch's spring compresses under the weight of the person sitting in the operator seat and completes an electrical circuit. With the switch closed the tractor's ignition system can be switched on with the ignition key. If the operator stands, the spring forces the gap open and interrupts the electrical ignition circuit. The safety circuit allows the riding mower motor to continue running if the PTO is not engaged. When the parking brake is set a second switch in electrical parallel with the OPS closes. This bypasses the safety switch under the seat. If the operator stands, the parking brake switch still completes the ignition circuit.The mower blade turns only when the PTO engages. If the operator should leave the seat with the blade turning and under power, injuries could result. The mower blade would even continue spinning at full power if the machine overturned. To prevent this type of accident, engaging the PTO deactivates a connection in the original circuit and completes a second circuit in series with the OPS switch.

If the operator leaves the seat with the PTO engaged, the ignition interrupts and the machine stops. Until the PTO is off, no combination of settings will restart the mower.

Apr 05, 2011 | Garden

1 Answer

Poulan Riding Mower won't crank, battery OK.


Forget the safety switches for now.The first thing I would check would be the fuse. It will be located on the battery side of the solenoid. Follow your positive battery cable to the solenoid. There will be a small red wire coming off of that post with an inline fuse. If the fuse is good, check your solenoid. There are two wires plugged into spade terminals at the bottom of the solenoid. Unplug the one that is insulated, the other one is a ground. Hook a test light from that wire to ground. When you turn the key to start (with the brake pedal held down), it should light. If it lights, your solenoid is bad. If not, then you can start looking at switches. Probably will be one of the two. Hope this helps. Dwain

May 20, 2009 | Poulan 42-Inch Steel Deck 17.5 HP Briggs &...

1 Answer

1998 craftsman mower w/19.5 hp Briggs and Stratton will not fire.


Hello B-N-L:

>>I Suggest you Check the Ign Module First and then the Safety Switches if the Ign Module (Coil) is Good. Remember that the Ign Module May Check Good, but if the Safety Switches Check Good, then Most likely the Coil is in the Early Stages of Breaking Down and will Cause this Problem.
>>You can Check the Ign Module (Coil) by Using the Following Instruction File.
The Following is an Instruction File I Made for Checking and Repairing this Problem.
>>Run the Engine Until it Quits, then Remove the Spark Plug. Wrap a Wire Around the Threads and Attach the Other End of the Wire to the Engine Block Turn the Engine and See if the Plug Fires.
>>If No, then Disconnect the Shut Off Wire at the Control Bracket First, Check for Fire at the Plug. If Still No Fire at the Plug; Then Disconnect the Shut Off Wire at the Coil (usually requires removal of the blower housing) and Check for Fire at the Plug.
>>If No Fire at the Plug , then the Coil/Ign Module is Bad. The Coil/Ign Module to Flywheel Gap is .020in.
>>On Some Model JD Engines, there is a Igniter that Goes Bad and Not the Coil. The Igniter is the Same as an Ignition Module. If the Plug Fires at Anytime During these 2 Checks, then a Safety Switch or Wire May be the Problem. Yes the Engine will Turn Even with a Bad Seat Safety Safety Switch. Usually if the Engine will Not Turn with the Ign Switch; the Blade Safety or Neutral/Clutch Safety Switch is Usually the Cause of this.
>>The Starter Turns and the Engine Doesn't Fire is an Indication of a Bad Coil/Ign Module or a Faulty Blade Safety Switch.
>>The Blade and Clutch Safety Switches Prevent the Starter from Engaging so the Blades or the Mower Does Not Move when the Starter Turns the Engine.
>>The Seat Safety is Designed to Stop the Engine if the Blades are Engaged or the Clutch Safety is Not Engaged when you Leave the Seat.
>>The Following is an Instruction File for the Safety Switch System. Any Input is Appreciated.
>>The Color Code of the Wires May be Different than those I Use as a Reference in the Instruction File.
>>**PLEASE REMEMBER THAT THE INSTRUCTIONS FOR CHECKING THE SAFETY SWITCHES IS JUST THAT!!! FOR CHECKING ONLY.
>>I NEVER Suggest a Mower be Operated with a Safety Device or Switch Disconnected or Bypassed.
>>**Now. On Some Model Mowers you can Simply Unplug the Safety Switch from the Harness. On Other Models you have to Place a Jumper Wire Between the Harness Terminals (on the 4 Post Switch (Clutch/Brake) Jumper from Same Color Wire (Example: White to White) First and then Check for Fire, Now Include the Black to Black Wires if No Fire.
>>Check the Clutch/Brake and the Blade/PTO Safety Switches First.
>>Check the Seat Safety Last. Usually the Seat Safety is Not in the System for Starting the Engine. Just to Ensure Someone is in the Seat when Engaging the Transaxle and/or Blades. Use a Paper Clip or a Short Wire to Make a Jumper.**
>>Use a Volt/OHM/Continuity Meter and Check the Continuity of the Switch. The Meter should Show when the Contacts are Closed and Open. The Meter will Swing All the Way Over when the Switch Contacts are Closed and Swing Back to the Rest Point when the Switch Contacts are Open.
>>If the Safety Switches Check Good, then Check the Ign Module (Coil).
>>Thanks.

Respectfully

John

Apr 11, 2009 | Craftsman 42 in. Deck 19.5hp Lawn Tractor

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