When an outboard repair doesn’t start, it can ruin a day on the water. The good news is that many problems are quick, easy fixes. Start with the obvious: Make sure your fuel line hasn’t been compromised by a cracked filter or a hole. Also check that the mounting bolts on your transom and jack plate are tight and that there are no visible signs of wear.
Next, see that the throttle-and-shift cable is properly adjusted and lubricated. Even though many outboards have digital throttle-and-shift systems, these still require regular inspection and maintenance. If yours isn’t responding, it may be time to replace the spark plugs. Carry spares and the tools to change them on board, if possible.
Troubleshooting Your Outboard: Tips for DIY Repair
Another common problem is lack of water flow through the engine cooling loop. This can be caused by weeds, dirt or other obstructions, or by a burst clamp or loose hose. Make it a habit to check the water intake and clear away any obstructions on a regular basis, especially after each use.
Thermostats regulate the engine’s temperature, and a malfunctioning one can lead to overheating. During the 100-hour service, technicians inspect and replace thermostats as needed, to ensure your motor operates within the optimal temperature range.