Yamaha Outboard Spark Plug Socket Size
Overview
When it comes to maintaining your Yamaha outboard motor, one important task is checking and replacing the spark plugs. To do this, you will need the right spark plug socket size to ensure a proper fit and avoid damaging the plugs. In this article, we will guide you through determining the correct socket size for your Yamaha outboard spark plugs.
Determining the Socket Size
To determine the correct spark plug socket size for your Yamaha outboard motor, you can refer to the owner’s manual or follow these steps:
- Locate the spark plugs on your Yamaha outboard motor. They are usually found on the cylinder head.
- Inspect the spark plugs and note their size. The size is typically indicated on the ceramic insulator at the top of the plug.
- Measure the diameter of the spark plug’s hexagonal base using a caliper or ruler.
- Refer to the chart below to find the corresponding socket size for your spark plugs.
Spark Plug Socket Size Chart
| Spark Plug Size (inches) | Socket Size (inches) |
|---|---|
| 5/8 | 13/16 |
| 3/4 | 13/16 |
| 13/16 | 13/16 |
Note: The above chart provides common spark plug sizes and their corresponding socket sizes. However, it is always recommended to consult your Yamaha outboard motor’s owner’s manual for the exact socket size.
Using the Correct Socket Size
Once you have determined the correct socket size for your Yamaha outboard spark plugs, follow these steps to safely remove and replace them:
- Ensure the engine is turned off and cool before starting any maintenance.
- Disconnect the spark plug wire by firmly grasping the boot and pulling it off the spark plug.
- Insert the spark plug socket onto the spark plug and turn it counterclockwise to loosen and remove the plug.
- Inspect the old spark plug for signs of wear or damage. If necessary, replace it with a new one of the same size and type.
- Apply a small amount of anti-seize compound to the threads of the new spark plug to prevent seizing in the future.
- Insert the new spark plug into the socket and carefully thread it into the spark plug hole by hand. Once hand-tight, use the socket to tighten it further, but avoid overtightening.
- Reconnect the spark plug wire by pushing the boot firmly onto the new spark plug until it clicks into place.
By using the correct spark plug socket size and following these steps, you can ensure proper maintenance of your Yamaha outboard motor and keep it running smoothly.