Replace the time delay module. It's about $20 from your dealer

the problem u are havening is in the carburetor, you will have to remove the float and needle the is a o ring above the white cover that holes the needle and float to you will have to remove it from the carburetor and replace it john Deere have that part i just repair my 425, you can get the hole unit it's around 15 bucks, and make sure that the fuel shut off valve on the bowel isn't stuck. hope this help, I've repaired a few mower with that problem.

I finally got if fixed. The fuel shut off module in the bottom of the carb tested bad and was allowing fuel to leak into the manifold. I replaced the needle valve under the float and once correctly adjusted all is fine. Due to lack of rain it has been sitting for about 2 weeks and last night I thought I'd see how it started and was fine. It fired right up, ran fine at full throtle.

JD 425 won't start Cranks over , has gas, new igniter, the spark appears weak, Any suggestions?

Your question will get more attention if you start a new thread rather than resurrect a 2 year old one.