Repair guides and support for riding lawn tractors sold under the Murray brand name, currently owned by Briggs & Stratton.

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motor tries to start but will not turn over


We have change the starter, the coil, solenoid, new battery and fuse along with the fuel filter, air filter and spark plug and still it will not turn over completely. Also jumped with the battery cables to the starter from the battery. Also have changed the key switch twice. Plus jumped with a screw drive on the solenoid. It tries to start but still will not completely turn over. You had said something about a safety switch for the blades not sure where that is. Also have check the seat safety switch. When the key is turned still nothing. What do we do next?

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what model Murray is it?


model 405000x8F we will check for the blade safety switch next.


I hoping someone can help us with this problem. Now we have changed the safety switches also seat and blade engagement switch also. Does any one know of a ground we might be missing. This machine is still not turning over. model #on the engine 21B807 type 0296 E1 code

05040I7FD not sure what to do next Please help.


does it turn over when you remove the spark plugs? Does it turn over at least a few full rotations?


Thanks oldturkey03 for get back to me. It only tries to turn over when we try to start with the solenoid. It seems like we are missing a ground somewhere. So we will be changing the negative battery cable next. Plus we found 4 safety switches and we have replaced two of them already. When we turn the key still nothing at all.


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1 Answer

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Rose, this is a big job with all the parts that have already been replaced. Anyhow, you might start here. " Symptom: Engine will not start

• Disconnect wires at ([C and D] Fig. 51) and attempt an engine start.

If the engine does not start:

• Check the ignition armature (G) for grounds.

If the engine starts and runs:

• Reconnect the wire at (C).

If the engine does not stop:

• Reconnect the wire at (D).

If the engine dies:

• Check the ignition switch ([H] Fig. 51).

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Also, remember that the VANGUARD™ series engines are equipped with Oil Gard® low oil protection systems designed to prevent engine damage from running with insufficient oil. This oil float system is mounted inside the engine cylinder. Oil Gard® will shut down a running engine and prevent it from restarting if the oil level becomes too low. When the oil drops below the minimum level, a float pin contacts the sensor mounting bracket in the cylinder. This completes a circuit from the ignition coil, through the module, to the float sensor and then to ground. This grounds the ignition coil and prevents the spark plug from firing. When a restart is attempted, a light in the ON/OFF switch flashes to indicate LOW OI. So, check to make sure you have enough oil. I think the way I would proceed is by just trying to bypass everything ad focus on trying to start the engine. right now it may help to get the owners manual from here and the partslist for the engine from here. Also, take a look at the electrical diagram for your mower.

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You do not have to change the switches, just check their function with a multimeter. Hope this helps, good luck.

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Hi oldturkey03, thanks so much for all your help. My hubby will work on that today and let you know what happens. Rose


Hi oldturkey3,

Thanks again for all your help but nothing is working. So after the third and correct key switch and still nothing we decided to bring it to a shop. still waiting to see what the problem was. thanks again for all your help.



Any updates? Have kinda same issue


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Rose will be eternally grateful.
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