Flooding problem with John Deere gx345

clean rebuild or replace carb

Sounds like the float assembly is not shutting down and the engine is flooding. Check that out or get a new carb.

You just go to the link I attached I'm sure you will get the solution of your problem.
825i John Deere

need new coil pack or have short in harness grounding engine from running. check fuel line to carburator. 1. take float bowel off bottom of carb. do not touch float or pin holding float. crank engine over until fuel comes out of carb. If fuel comes out, you don't have fuel problem. put float bowel back on carb. 2. check for spark. take spark plug out of mower. put wire back on plug and place the threads on head [or metal of engine to ground the plug]. crank engine over for a few seconds to see if plug gets spark . [always double check with another spark plug that is good]. [[ Remember!!! you have to have someone sitting on the lawnmower to start. unless you by-pass safety switch [only do this if you understand how the safety switch works. NOT EXPLAINED HERE!!!]] If spark is present, there is no grounding problem. when engine is cool. 3. CHECK COIL PACK. for continuity. When the coil pack gets hot it will stop any juice to the plug. A>Check temp sensor B> Check Safety switches grounding out. C> Check for cut wiring harnes. [loose wires rubbing against pulleys, wires cut by rodents]. Hope this helps.........................GAS

sounds like the needle valve in the carb is not sealing

Sounds like you may have a problem with Choke adjustment, or perhaps a broken choke cable. Do you have a workshop manual?

need carb kit with nedle and seat

if it coming out from there then it's flooding sounds like the float is stuck open you will need to rebuild this carb and clean out all the small holes inside with a small blow gun or can of compressed air...good luck