Have a Toro Lawn Tractor LX460, third season in use. Battery died 2 times while mowing. Jump started it once. Finally replaced battery, now it tries to start but doesn't. I spayed quick start in and it helps, there is gas in the fule tank and fuel lines but the gas is not kicking in. Could it be a spark plug or something with the carburator?
Best guess , blocked main jet or water in the carby
an overhaul would be in order
SOURCE: Toro Lawn Mower Won't Start
this is a very common problem with these toro mowers. the needle valve in the bowl of the carb. is plugged up with dirt or varnish from the fuel. just under the primer bulb there is the carb bowl. it has a nut under it that holds it on remove the bowl and make sure fuel flows constantly while the bowl is off. push up on the float to stop the gas flow. this could be messy and dangerous. careful with the gas. its flammable. best solution is to remove the carb and soak it overnight in a parts cleaner like gunk. caution small parts inside. this happins every year on mine no matter what i do. seems like the orifice is so small it clogs easily. good luck
SOURCE: Toro walk behind model 20025 Gas running through the carburetor
Carb. float must be stuck open. First if you have no fuel in the tank it must all be in the crankcase.Drain the oil and refill and also check the carb as the float has to be sticking open. Hope this will help you. Donnyb60
SOURCE: starts runs min. or two then stops....
Go to toro.com then click customer care, then click manuals and parts. Type in model no. and download the owners manual. This should get you the spark and flywheel gap. Probably still something in the carb. Some orifices are very hard to find and to clean but they must be clean. Also check for dirt dopper nest in the muffler.
SOURCE: Mower will not start. Makes a loud fast clicking noise when the key is turned.
Loud ticking usually indicates near dead battery, take it out and charge it. If it still ticks you may need to replace it as they are only good for a few years.
SOURCE: Toro TimeCutter z4200 will not start
Toro Timecutter Z4200 mounts gas tank under
seat and below carburetor. After first started, Z4200 will start
OK again during mowing this period. But after some time passes
(next mowing), gas evaporates from carburetor. Can run down
battery using battery/starter getting gas backup through carburetor to
start engine. This is poor Toro design, but good for service
charges when replacing good components while trying to fix this problem.
Better solution is to add an outboard motor
one-way squeeze bulb (approx. $15) between the fuel filter and the
carburetor. Using the squeeze bulb for first start will prime the
motor so that it will start without having to crank so long (which Toro
says will burn up the starter). Toro saves $15/mower as well as
selling new Z4200 starters.
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We have fixed the problem. There was a sensor that turns the gas off to the engine after you shut off the mower to prevent backfiring. It was replaced and now it works great! Thanks for your interest in helping!!
If the battery did die while mowing, the magneto is not generating current or, there is a faulty electrical connection from magneto or, there is a blown fuse in the magneto circuit. Could I get some additional info, please?: Why do you say the battery died while mowing? Why do you say the gas is not kicking in? What is the terminal voltage of the new battery now w/o engine running? What is battery terminal voltage with engine running? When you write that it tried to start, do you mean it cranks well but doesn't start or, that it cranks slowly? Could you describe what happens when you spray the carburetor? thanks... Charlie
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