JD X 300 ,wont start

Thanks for your suggestion,it worked. Took the original carb ,took it apart soaked it in Kem Dip for 4 hrs.rinsed with water,let dry put it back on ran on full choke for a few minutes then it calmed down and is running like new. I had no idea that a brand new carb would not work.A lesson learned.Amazon is going to get a bad carb back soon.It is rewarding to fix stuff yourself ,but i could not have done it without your help,Thanks again for taking the time to reply.

Dixie, In my 55+ years of wrenching, I've pulled quite a few carbs apart, cleaned, rebuilt, and reinstalled, and they've always worked fine! Waay back in the 60's, Permatex had a carb cleaner that made the carbs look brand new, would burn the hair off of your arm too as well as burning your skin! EPA didn't like it though and now we have so so-so cleaners... most work, but not like in "the good ol' days"! I've never used Kem Dip, but from your reply it sounds pretty good! I would have used a parts cleaner or carb spray to rinse, but that's only to save drying time... patience is NOT one of my virtues!

Carbs typically don't wear out, they simply become clogged with a piece of debris from tank, pump or fuel line, or restricted from a varnish build up. Now a carb CAN be damaged in the "rebuild" process, especially the jets! I've run across some carbs that have jets cast right into the carb body, and others that have removable jets. The removable is where you can get into trouble! These are often VERY tight and the average Joe grabs a screwdriver and tries to remove the jet... sometimes it comes out and sometimes the screwdriver slips and puts a burr on the corners of the screwdriver slot. As small as that burr is, it can alter the air or fuel flow and your "rebuilt carb" can run worse! If you plan on rebuilding several carbs, I'd suggest a set of "gunsmith" screwdrivers. A normal screwdriver is tapered from the shank to the tip. This taper tends to WANT to slip out of the screw slot. Gunsmith screwdrivers are ground with a flat on the sides, so you have a flat surface grabbing the flat surface of the slot.

OK, enough of my "useless information"! Well, maybe a bit or two more! Your carb may have been clogged with a build-up, USE a fuel stabilizer! These help prevent degrading of the rubber type fuel lines, preserve the octane rating over a longer period of time, and will break down the varnish build-ups! Last (I promise!) is that you've got a 50/50 chance of getting a new carb unless you pay 3 or 4 times the price for an OEM carb.

Glad everything worked out for you! Bob