Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Hi, my name is***** will be assisting you.
Does the engine try to turn over when you hit the ignition key? Can you provide the model and type or spec from the engine so that I can better assist you?
We can start by checking the alternator. The red wire coming from under the flywheel is the VDC charging line that provides voltage back to the battery in order to keep it charged. If you have a volt meter you can touch the black test lead to the red wire in that connector and the red test lead to the positive post of the battery, with the engine running full throttle you should see 14 - 15 volts DC there. If you aren't getting that then the alternator or magnets inside the flywheel are bad and will need to be replaced. If you are getting that reading then the battery is bad and not holding a charge.