Small Engine Troubleshooting Problems? Ask a Mechanic Now.
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No, the light being on or the indicator saying svc oil will not keep it from starting. It is a reminder however that the machine has come upon the normally recommend hours to change the oil. This normally will happen at presets times based on manufacture settings, most of the time this is at 50 hour intervals. The system will alert one beginning at like 49 hours and will continue until it turns 51 hours and then again at 99 hours and go off at 101 hours for instance. It is not something that you can change or reset, it is the way that the machine is designed.
What happens when you try to start it?
Did it make any difference with the charger attached?
If it is only making a buzzing noise then the battery either has a bad cell in it so that when you put a load on it trying to start the engine it is holding enough amperage to turn the engine over or the starter solenoid is bad which is probably where the buzzing is coming from. I would first have the battery load tested before I went any further into trying to get it to start. One would think that jumping it with a vehicle would start it but if the battery has a bad cell it may not be enough to crank the engine.