John deere lt133 kohler 13hp starts ok then

a weak spark indicates a coil problem
that problem can come from a faulty condenser in the ignition system or incorrect timing for the system
if it has an electronic ignition system test / replace it
if it has a points system replace the condenser and set the points to the correct gap
I

try this

john deere service web site

the carb needs power to open the solenoid on the bottom and if the charging system doesn't work without a battery

If its the same starter, check part no.

Hi, what are you calling proper voltage? If its a gap tester it should jump at least 8mm. If its a peak voltage tester it should be at least 12,000 volts. If not the ignition module is faulty, which is very common on kohler engines. Hope this helps, regards Phil.

A ten year old mower that probably cost about $1500.00 at least twn years ago that has not been taken care of is not worth much.

John Deere is a good name as in Kohler. How much is it worth? It is currently worth what you paid for it, you just made it worth that much.

I had the same mower in my shop with the same prob. Last week, here is what i did to correct the problem, take the fuel line apart at the fuel filter, open the fuel cap and drain the gas from the tank, once it stops i took couple old walmart bags and compressed air to slowly blow air in to the tank to blow the residue and trash out of the fuel tank. Next using compressed air to blow through the fuel line from where the filter was toward the carb. Next unbolt the carb and remove the fuel bowl, take the small pin holding the float out and slowly remove the float pulling strait up as the needle will be attached via a small channel on the float. There is where you will find the seat which the needle you extracted sets in to stop or allow the fuel to flow. Clean these parts and area WELL. i usually take the air screws out and use carb cleaner to clean those areas as well. Reinstall the needle and float, pin assembly and the bowl. Reinstall the carb , and make SURE to install a new fuel filter not exceeding the last filters micron flow, double check all connections, clamps, and hardware, add new FRESH gasoline with no less than 89 octane at any time, engine should fire and run as intended.

This model is known for shearing the flywheel key.

make sure the tank has fuel and replace the fuel filter