Johnson, now Johnson/Evinrude, is synonymous with boats and boating. Its engines are known worldwide. However, as with most machines that are exposed to the elements, wear and tear does occur. The problems are relatively easy to troubleshoot, whether it be an issue with the fuel line assembly or an oil leak. Before taking your 115 HP outboard engine in for service, there are a few basic troubleshooting steps you can do on your own.
If you have trouble starting the engine, remove the spark plug cover and using the wrench, remove the plug. Check for excessive dirt or corrosion and clean the plug as necessary. Replace the spark plug if needed.