Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Where to start! The belt has to be tight when the brake clutch is up. With engine off, can you slip the belt over the drive pulleys? Belt has to be tight for optimum drive. This is hydrostat transmission and has no real place to add fluid, though it does have a vent that can be removed, and small amount of oil 15w50 can be added.
As for engine dieing, with twin engine, if the engine has the Kohler Oil Guard system, the oil pressure switch can kill the spark. But if not spark, the carburetor has a fuel solenoid in the base of it. It has to have 12 volts at all times the key is on. Do you have any battery issues that would indicate the voltage would be low?
Is fuel supply adequate to the carburetor? Can you remove the fuel solenoid and plug the hole for a test?
Did you find problem?