Small Engine Troubleshooting Problems? Ask a Mechanic Now.
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Locate the normally yellow wire that is coming out of the side of the engine block opposite of the carburetor and unplug the wire from the rest of the wiring at the connector this will eliminate the oil sensor and if it were a problem you should now have spark when checked. If you still have no spark then my next step would be to replace the little igniter box that is located on the side of the engine block and the wires go into it.
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