* Specific models vary: There were different variations of the 15hp Johnson in 1983. Each model may have different spark plug specifications.
* Manufacturer's manual is key: The most reliable information is in your engine's owner's manual. It will state the correct spark plug gap for your specific model.
Here's how to find the right information:
1. Locate your engine's model number: This is usually found on a sticker or plate on the engine itself.
2. Look up your manual online: Search for "1983 Johnson 15hp [your model number] manual" on the internet. You might find a free downloadable PDF version or need to purchase one.
3. Check a reputable online parts resource: Websites like Boats.net or MarineEngine.com may have information on spark plug gaps for your specific engine model.
Remember: Always refer to the manufacturer's specifications for your specific engine model when setting spark plug gaps. Using the wrong gap can lead to poor performance and even engine damage.
