What is the valve clearance for a John Deere 1020 gas burning 3 cyl. Tractor

SOURCE: john deere 420 trouble starting getting gas and

The engine needs air, so be sure the air filter is clean. If it is not, replace it.

The engine needs spark. Replace the spark plug and be sure that the battery has a complete charge.

The engine needs good fuel so be sure the gas is newly purchased, not gas that has been sitting around for months.

SOURCE: gas tamk removal john deere 115

I had the same thing happen. I got the tank out, but it wasn't easy. Take out the bolts out that hold the rear end on. Take off the two springs that support the seat. Take out the battery and the battery tray. Take out the 6 bolts that hold the black cowling and the front of the green platform to the frame. This will allow you to lift the seat platform far enough off the rear end to allow the tank to be pulled out through the side. You also have to remove the metal bracket which holds the front of the tank and has caused the tank to leak in the first place. New tank is $56.00 not installed. I used a soldering gun and melted the plastic back together. I think it will hold quit a while. I know this is a little sketchy, but It worked for me.

SOURCE: 3020 carburetor ? john deere gas tractor, 3020

those carbs are real simple you will not have any problem

SOURCE: can't get front wheel off my john deere lawn tractor

remove the cap on wheel then there is a ring or cotter pin to remove then pull wheel off

SOURCE: problem with John Deere L120 tractor

Park brake switch is the most likely culprit,any other would cause the tractor to not turn over in the crank position.