That leaves compression
must be low
worn rings or valves issue
SOURCE: Craftsman riding lawn mower...engine dies when blade is engaged
Push the clutch all the way down and try to start, does it crank over?
Let me know.
Regards,
SOURCE: craftsman riding lawnmower shuts off after 15 - 20 mins.
I have a Troy-Bilt push mower that does the same.
Try this - Run the mower until the point of quitting. Keep the hood up and be ready to remove the gas cap. As soon as you feel it start to stutter like it's going to quit, unscrew the gas cap and see if it comes back to life and doesn't quit.
If that works, then what is happening is that the gas in the carburetor bowl is getting depleted faster than the tank can provide it, possibly because of a clogged vent that's supposed to allow air back into the gas tank as gas is used.
You can try running with the gas cap not quite tight, to let some air seep in that way, but that's more prone to sloshing leaks. You could also try drilling a hole in the gas cap - about 3/16" is plenty, and stuffing a piece of natural sponge in to keep the gas in and dirt out. Synthetic sponge will deteriorate in gas.
SOURCE: Riding mower having problems starting then runs roughly
I have a Scotts _ John Deere law mower tractor model S2048-S2554 Serial number 020-001, the engine runs but sounds like it is going to die or it needs air --- it runs unnevenly
SOURCE: Craftsman LT1000 ridign mower engine dies after 15 min-deadman on
There are several things that could be going on, but what you said in your description about the dead man switch in the seat may need your attention first. The switch it self could also be bad. After you rule this out the next thing I would check is the fuel shut off solenoid located on the carb when you turn the key on to run you should hear a click and feel it in the solenoid. After this you may have a fuel pump issue or a coil issue. but from what you I have described I believethe first 2 itmes I mentioned should fix your problem
SOURCE: Stalls after 20 mins. of running fine. (Starving for gas)
From the rear of machine look at the top left of fuel tank for the fuel line.Where line comes out of tank see if it is pinched where it goes down between frame and tank,grab line and see if it moves freely.If that is OK loosen fuel cap after 10 minutes of run time to see if your vent hole in cap is working.These are 2 common problems for the L series mowers.
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