07-24-2011, 11:34 AM
John Deere 425 Won't Start
My name is Ricky, I have a John Deere 425 Mower that will not start. The motor turns over, getting plenty of fuel and the plugs are firing. Does anyone have any sugestions as to what would be causing my problem?
07-24-2011 11:34 AM
07-24-2011, 02:25 PM
Hello Ricky and WELCOME TO DT
Need a little more info.
Is it even trying to start?
Did it all of a sudden start acting up,or have you been having probelms?
Is it a good spark? Even though it sparks,if it's weak it won't fire.
How many hours? I take it this is a Kawasaki engine.
I had a Briggs with OHV's and due to a backfire from running it out of fuel, it refused to start up again,only to find I lost a pushrod.
Just a thought.
07-24-2011, 03:48 PM
It does have a Kawasaki 20 HP engine with about 900 hrs on it. It hasn't started in over a year and it was almost like it wasn't getting any fuel. Over the last week my brother and I have been trying to diagnose the problem. The fuel pump wasn't working at first, but we got it back to going and seems to be pushing a good amount of fuel. I was outside messing with it again earlier and noticed that it is getting spark, however I don't think it is getting enough to fire. Would the time delay module have anything to do with it or would it be another problem?
07-24-2011, 04:43 PM
If it hasn't been started in that long of a time,the cylinders could be dry of oil,and you're not getting any compression.
You could try squirting some oil in the cylinders to see if that would help.
That many hours,the compression might be low to begin with.
07-24-2011, 04:47 PM
I done a compression check and it seems to be getting enough. Any other suggestions?
07-24-2011, 04:57 PM
Just a guess.... If it has a gone bad low oil sending unit it could be whats keeping it from starting.
07-24-2011, 05:10 PM
The early 445's used a plastic cam gear. I believe that the 425 engine and the 445 engine are the same except that the 425 is carburated and the 445 is fuel injected. The replacement cam gear is steel. The John Deere parts catalog doesn't show a serial number break, but it does show that the 425 and 445 use the same cam and gear. The part number is AM124510.
When mine finally let go at 800 or 900 hours, it happened when I tried to start the engine. The JD parts website shows a list price of $150.00. I would have thought that Deere would have learned from the automotive industry that plastic cam gears don't last, but apparently they did not. I can't say for sure that this is your problem, but the symptoms are identical to mine.
2320, 54D MMM, 200CX FEL, 54 Front Blade with Artillian Extensions, Omni Transformer Hitch
445, 54 mower and 54 front blade
80 dump cart, 21 walk behind mower
07-24-2011, 09:04 PM
Hey Ricky, Welcome to DT.
Generally gas and spark and the engine will run. I will throw in the safety switches into this mix as well. Seat and PTO are usually the big ones. Make sure your PTO isn't engaged. When sitting for a period of time you just don't know who flipped a lever. Good luck.
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