John Deere 324 Runs for 15min then dies

dejado

New member
Joined
Jul 22, 2021
Messages
1
Tractor
John Deere 324
Hi,

I have a John Deere 324 riding lawn mover that starts up very reliably and runs for 15-20 minutes then starts to search with high revs and low revs then just stops. After waiting a minute it will start up and run for a few minutes and then stop again. Once it is warmed up it tends to die. Here is what I have troubleshooted so far. I replaced the spark plugs. I cleaned the air filter. I replaced the gas filter. I have used a quart of fuel stabilizer and carb cleaner in the gas.I also cleaned out the vent on the gas cap. It seems like it might be an electrical problem. I have read that it could be secondary to faulty ignition coils but have not tested them yet. Any thought on what might be causing this and if it is something I might be able to fix without a PhD in mechanics or electrical engineering.
 

Roadworthy

Veteran Member
Joined
Aug 24, 2019
Messages
1,938
Location
Southeast Washington
Tractor
Kubota L2501 HST,
When it stalls you could try removing the fuel tank cap. Many newer engines have a fuel stop solenoid in the carburetor. They are supposed to stop fuel flow when the key is turned off but on some the solenoid fails when hot and turns off the fuel. Heat can also affect ignition coils. Intermittent problems are the absolute worst to solve!!
 

DanMc77

Gold Member
Joined
Feb 3, 2015
Messages
264
Location
Conway, NH (camp), or Holden, MA (waiting for camp
Tractor
JD 4600, JD 2210, JD 332
@dejado: When debugging things like this, it's important to quickly figure out if it's an electrical problem (loss of spark), or a fuel problem. Your description of it quitting by first increasing RPM, then dying off sounds more like it's a fuel problem. Electrical problems tend to be instantaneous - it either runs or it doesn't and when it quits, it would just quit. So to confirm that it's fuel, get a can of starter fluid. When the engine starts to die off, spray that into the intake. With a fuel issue, the starting fluid will give the engine a boost of power. You can also do the same thing if you can add choke when it starts to die off. If you can't tweak the choke, then put your hand over the intake for just a moment, if you can get to it. That should also bring back some power as it dies off.

Assuming it's a fuel issue, then you could have water in the fuel, a stuck float in the carb bowl, a plugged up fuel filter (but you already changed that), or the gas cap vent. The easiest thing to try at this point may be to drain the fuel tank and put in fresh gas, because water in the gas will drive you crazy.

Incidentally, never use starter fluid with a diesel engine - starter fluid can create too much power in the cylinder and bend piston rods.
 

Diggin It

Super Member
Joined
Aug 12, 2018
Messages
9,701
Location
On A Hilltop
Tractor
LS MT125 TLBM
Is there a clear fuel filter so that you can see if there is fuel in it? If so, look when it dies and see if it's empty/dry, then watch to see if it fills slowly. You may have an obstruction in either the tank or the line between the tank and filter.
 
 
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